CN112575448A - Preparation method of porous non-woven fabric with antibacterial function - Google Patents
Preparation method of porous non-woven fabric with antibacterial function Download PDFInfo
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- CN112575448A CN112575448A CN202011453162.2A CN202011453162A CN112575448A CN 112575448 A CN112575448 A CN 112575448A CN 202011453162 A CN202011453162 A CN 202011453162A CN 112575448 A CN112575448 A CN 112575448A
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/005—Synthetic yarns or filaments
- D04H3/007—Addition polymers
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/24—Formation of filaments, threads, or the like with a hollow structure; Spinnerette packs therefor
- D01D5/247—Discontinuous hollow structure or microporous structure
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/10—Other agents for modifying properties
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/10—Other agents for modifying properties
- D01F1/103—Agents inhibiting growth of microorganisms
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/44—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds
- D01F6/46—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds of polyolefins
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Abstract
本发明公开了一种具有抗菌功能多孔无纺布的制备方法，其特征是，包括以下步骤：(1)锌掺杂二氧化钛纳米粉体的制备；(2)锌掺杂二氧化钛纳米粉体与致孔剂的复配技术；(3)抗菌/高致孔母粒的制备：将经步骤(2)表面修饰后的纳米抗菌/高致孔粉体与树脂粉体混合均匀，混好的原料经双螺杆挤出共混造粒挤出，得到抗菌/高致孔母粒；(4)将抗菌/高致孔母粒干燥后与树脂切片混合均匀，喂入纺丝机的喂料器进行熔体纺丝，经拉伸‑成网‑固结成型工艺得到抗菌/高致孔纺粘无纺布。本发明通过纳米抗菌/高致孔粉体制备及表面修饰制备功能母粒并进行纺丝，制备具有白色的抗菌/高致孔纺粘无纺布。
The invention discloses a preparation method of a porous non-woven fabric with antibacterial function, which is characterized by comprising the following steps: (1) preparation of zinc-doped titanium dioxide nano-powder; (2) zinc-doped titanium dioxide nano-powder and preparation Compounding technology of porosity agent; (3) Preparation of antibacterial/high porosity masterbatch: Mix the nano antibacterial/high porosity powder and resin powder after surface modification in step (2) evenly, and the mixed raw materials are treated Twin-screw extrusion, blending, granulation and extrusion to obtain antibacterial/high porosity masterbatch; (4) After drying the antibacterial/high porosity masterbatch, mix it with resin chips evenly, and feed it to the feeder of the spinning machine for melting Body spinning, and the antibacterial/highly porous spunbond non-woven fabric is obtained by stretching-web-forming-consolidation molding process. The invention prepares functional master batches by preparing nanometer antibacterial/highly porosity powder and surface modification and spinning them to prepare white antibacterial/highly porosity spunbond non-woven fabric.
Description
Technical Field
The invention belongs to the field of functional textile materials, and particularly relates to a preparation method of a porous non-woven fabric with an antibacterial function.
Background
On the basis of improving the barrier efficiency, other functionalities are added to meet the requirements of nonwoven fabrics which are gradually developed, and some solutions are provided at present, for example, the solution is from the original source of fibers, and nanofibers can be prepared to improve the barrier efficiency, but the corresponding air permeability is also greatly reduced.
The air permeability is also an important index in the production of filter materials for masks, air conditioners, and the like. Therefore, research on improving the barrier efficiency of the filter material without affecting the air permeability is a current research hotspot.
As is known, the outer layer of the mask is made of spun-bonded non-woven fabric, the raw material of the mask can be polypropylene or polyester, and in a common mask, the main function of the outer layer structure is water resistance rather than barrier filtration. In the epidemic and post-epidemic times, the prevention and control of bacteria and viruses become an important direction of concern, so the demand for protective materials is greatly increased, and new demands for the quality of the protective materials are also provided.
The application of the antibacterial material to the medical protective material is always in standard configuration, but with the development of epidemic situations, the civil protective articles also put forward the requirements of antibiosis and even antivirus, which stimulates the development of the antibacterial protective material.
Disclosure of Invention
This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. In this section, as well as in the abstract and the title of the invention of this application, simplifications or omissions may be made to avoid obscuring the purpose of the section, the abstract and the title, and such simplifications or omissions are not intended to limit the scope of the invention.
The present invention has been made keeping in mind the above and/or other problems occurring in the prior art.
Therefore, the present invention is directed to overcome the disadvantages of the prior art and to provide a method for preparing a porous non-woven fabric with antibacterial function.
In order to solve the technical problems, the invention provides the following technical scheme: a preparation method of a porous non-woven fabric with an antibacterial function comprises the following steps,
preparing nano antibacterial/high pore-foaming powder: mixing zinc-doped titanium dioxide and nano silicon dioxide in a jet milling mode, wherein the jet milling pressure is 7-9 kg;
surface modification of nano antibacterial/highly porous powder: carrying out surface modification on the nano antibacterial/high-porosity pore-forming powder by a high-speed kneading machine, wherein the temperature is 60-80 ℃, the stirring speed is 1500-2500 r/min, a surface modifier is sprayed in by an atomizing device and mixed with the nano antibacterial/high-porosity pore-forming powder, the adding amount of the surface modifier is 0.5-1 wt% of the mass of the nano antibacterial/high-porosity pore-forming powder, and the high-speed mixing is 40-60 min;
preparing the antibacterial/high-porosity master batch: uniformly mixing the surface-modified nano antibacterial/high-porosity pore-forming powder with resin powder, wherein the nano antibacterial/high-porosity pore-forming powder accounts for 30-50 wt% of the whole mass, and extruding the mixed raw materials through twin-screw extrusion, blending, granulating and extruding to obtain antibacterial/high-porosity pore-forming master batches;
drying the antibacterial/high-porosity master batch at the temperature of 120-150 ℃ for 3-6 h;
and uniformly mixing the antibacterial/high-porosity master batches with the resin slices, and feeding the mixture into a feeder of a spinning machine through a separate metering device for spinning to obtain the antibacterial/high-porosity spun-bonded non-woven fabric.
As a preferable embodiment of the method for preparing a porous non-woven fabric having an antibacterial function according to the present invention, wherein: the preparation method of the zinc-doped titanium dioxide comprises the following steps,
selecting titanium dioxide with the particle size of 10-20 nm as a base material, mixing the base material with distilled water to prepare a nano titanium dioxide aqueous solution, wherein the concentration of the nano titanium dioxide is 5-15%, and adding zinc chloride to prepare a mixed solution, wherein the concentration of the zinc chloride is 0.1-3%;
dropwise adding 0.1% sodium hydroxide solution, adjusting the pH value to 6-10, reacting for 2-10 h at 120-220 ℃ through a hydrothermal kettle, and performing rotary evaporation to obtain the zinc-doped titanium dioxide.
As a preferable embodiment of the method for preparing a porous non-woven fabric having an antibacterial function according to the present invention, wherein: the jet milling mode is characterized in that the number of jet milling is 2.
As a preferable embodiment of the method for preparing a porous non-woven fabric having an antibacterial function according to the present invention, wherein: the zinc-doped titanium dioxide and the nano silicon dioxide are mixed, wherein the mass ratio of the zinc-doped titanium dioxide to the nano silicon dioxide is 10: 1-1: 10.
As a preferable embodiment of the method for preparing a porous non-woven fabric having an antibacterial function according to the present invention, wherein: the particle size of the nano silicon dioxide is 20-60 nm.
As a preferable embodiment of the method for preparing a porous non-woven fabric having an antibacterial function according to the present invention, wherein: the surface modifier comprises one or more of active organosilicon series surface modifiers or titanate series surface modifiers.
As a preferable embodiment of the method for preparing a porous non-woven fabric having an antibacterial function according to the present invention, wherein: the resin powder is one or more of PP, PBT and PET powder.
As a preferable embodiment of the method for preparing a porous non-woven fabric having an antibacterial function according to the present invention, wherein: the basic resin slice is a spinning-grade resin slice and comprises one or more of PP, PBT and PET resin slices.
As a preferable embodiment of the method for preparing a porous non-woven fabric having an antibacterial function according to the present invention, wherein: in the spinning process, the spinning temperature is 170-290 ℃.
As a preferable embodiment of the method for preparing a porous non-woven fabric having an antibacterial function according to the present invention, wherein: the monofilament titer of the antibacterial/high-porosity fiber is 5-20 um.
The invention has the beneficial effects that:
the invention adopts a brand-new antibacterial/high pore-forming mechanism to prepare the novel spun-bonded non-woven fabric, improves the filtration efficiency through micropores in the fiber without changing the diameter of the original fiber, does not influence the air permeability of the non-woven fabric, can improve the functions of preventing and killing bacteria and viruses of the non-woven fabric through the addition of the antibacterial nano powder, improves the added value of the spun-bonded non-woven fabric, and is particularly suitable for the development of masks and air-conditioning filter materials.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise. Wherein:
FIG. 1 is an SEM image of the antibacterial/highly porous fiber obtained by the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, specific embodiments thereof are described in detail below with reference to examples of the specification.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
Furthermore, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
Example 1:
a preparation method of a porous spun-bonded non-woven fabric with an antibacterial function comprises the following steps:
(1) selecting titanium dioxide with the particle size of 20nm as a base material, mixing the titanium dioxide with distilled water to prepare a nano titanium dioxide aqueous solution, wherein the concentration of the nano titanium dioxide is 8%, and adding zinc chloride to prepare a mixed solution, wherein the concentration of the zinc chloride is 0.8%; dropwise adding 0.1% sodium hydroxide solution, adjusting the pH value to 6, reacting for 6 hours at 200 ℃ through a hydrothermal kettle, and performing rotary evaporation to obtain zinc-doped titanium dioxide; mixing zinc-doped titanium dioxide and nano silicon dioxide (40nm), and crushing for 2 times, wherein the pressure of air flow crushing is 7 kg;
(2) surface modification of nano antibacterial/highly porous powder: carrying out surface modification on the nano antibacterial/high-porosity porous powder by a high-speed kneading machine according to the ratio of 1:1, wherein the temperature is 80 ℃, the stirring speed is 2500 r/min, a surface modifier is sprayed in by an atomizing device and mixed with the nano antibacterial/high-porosity porous powder, the adding amount of the surface modifier is 0.5 wt% of the mass of the nano antibacterial/high-porosity porous powder, and the high-speed mixing is 60 min; the surface modifier is an active organic silicon series surface modifier, namely a silane coupling agent KH 560;
(3) preparing the antibacterial/high-porosity master batch: uniformly mixing the nano antibacterial/high-porosity pore-forming powder subjected to surface modification in the step (2) with resin powder, wherein the resin powder is PP resin powder, the nano antibacterial/high-porosity pore-forming powder accounts for 30 wt% of the whole mass, and the mixed raw materials are subjected to twin-screw extrusion, blending, granulation and extrusion, wherein the processing temperature is 170 ℃ to obtain an antibacterial/high-porosity pore-forming master batch;
(4) drying the antibacterial/high-porosity master batch at the temperature of 100 ℃ for 8 hours; uniformly mixing the antibacterial/high-porosity master batch and basic resin slices in a mass ratio of 1:19, feeding the mixture into a feeder of a spinning machine for melt spinning, wherein the basic resin slices are PP slices, the spinning temperature is 205 ℃, and the antibacterial/high-porosity spun-bonded non-woven fabric is obtained, and the color of the antibacterial/high-porosity fiber is white. The particle size of the obtained nano antibacterial/high-porosity porous material is 170nm through a laser particle analyzer test, the antibacterial effect of the prepared spun-bonded non-woven fabric is tested according to the test standard of GB/T20944.3-2008, the antibacterial effect of escherichia coli, staphylococcus aureus and white entwisteria is 87/88/85, the filtration barrier efficiency is tested according to the test standard of GB/T19083-2010, and a test sample is prepared into an SMS type mask, wherein S is the spun-bonded non-woven fabric disclosed by the invention, M is a melt-blown layer, and the filtration efficiency is 92%.
Example 2:
a preparation method of a porous spun-bonded non-woven fabric with an antibacterial function comprises the following steps:
(1) selecting titanium dioxide with the particle size of 20nm as a base material, mixing the titanium dioxide with distilled water to prepare a nano titanium dioxide aqueous solution, wherein the concentration of the nano titanium dioxide is 8%, and adding zinc chloride to prepare a mixed solution, wherein the concentration of the zinc chloride is 0.8%; dropwise adding 0.1% sodium hydroxide solution, adjusting the pH value to 6, reacting for 6 hours at 200 ℃ through a hydrothermal kettle, and performing rotary evaporation to obtain zinc-doped titanium dioxide; mixing zinc-doped titanium dioxide and nano silicon dioxide (40nm), and crushing for 2 times under the crushing pressure of 8 kg;
(2) surface modification of nano antibacterial/highly porous powder: carrying out surface modification on the nano antibacterial/high-porosity porous powder by a high-speed kneading machine according to the ratio of 1:1, wherein the temperature is 80 ℃, the stirring speed is 2500 r/min, a surface modifier is sprayed in by an atomizing device and mixed with the nano antibacterial/high-porosity porous powder, the adding amount of the surface modifier is 0.5 wt% of the mass of the nano antibacterial/high-porosity porous powder, and the high-speed mixing is 90 min; the surface modifier is an active organic silicon series surface modifier;
(3) preparing the antibacterial/high-porosity master batch: uniformly mixing the nano antibacterial/high-porosity pore-forming powder subjected to surface modification in the step (2) with resin powder, wherein the resin powder is PP resin powder, the nano antibacterial/high-porosity pore-forming powder accounts for 30 wt% of the whole mass, and the mixed raw materials are subjected to twin-screw extrusion, blending, granulation and extrusion, wherein the processing temperature is 170 ℃ to obtain an antibacterial/high-porosity pore-forming master batch;
(4) drying the antibacterial/high-porosity master batch at the temperature of 100 ℃ for 8 hours; uniformly mixing the antibacterial/high-porosity master batch and basic resin slices in a mass ratio of 1:19, feeding the mixture into a feeder of a spinning machine for melt spinning, wherein the basic resin slices are PP slices, the spinning temperature is 205 ℃, and the antibacterial/high-porosity spun-bonded non-woven fabric is obtained, and the color of the antibacterial/high-porosity fiber is white. The particle size of the obtained nano antibacterial/high-porosity porous material is 120nm through a laser particle analyzer test, the antibacterial effect of the prepared spun-bonded non-woven fabric is tested according to the test standard of GB/T20944.3-2008, the antibacterial effect of escherichia coli, staphylococcus aureus and white entwisteria is 89/89/87, the filtration barrier efficiency is tested according to the test standard of GB/T19083-2010, and a test sample is prepared into an SMS type mask, wherein S is the spun-bonded non-woven fabric disclosed by the invention, M is a melt-blown layer, and the filtration efficiency is 95%.
Example 3:
a preparation method of a porous non-woven fabric with an antibacterial function comprises the following steps:
(1) selecting titanium dioxide with the particle size of 20nm as a base material, mixing the titanium dioxide with distilled water to prepare a nano titanium dioxide aqueous solution, wherein the concentration of the nano titanium dioxide is 8%, and adding zinc chloride to prepare a mixed solution, wherein the concentration of the zinc chloride is 0.8%; dropwise adding 0.1% sodium hydroxide solution, adjusting the pH value to 6, reacting for 6 hours at 200 ℃ through a hydrothermal kettle, and performing rotary evaporation to obtain zinc-doped titanium dioxide; mixing zinc-doped titanium dioxide and nano silicon dioxide (40nm), and crushing for 2 times at the crushing pressure of 9 kg;
(2) surface modification of nano antibacterial/highly porous powder: carrying out surface modification on the nano antibacterial/high-porosity porous powder by a high-speed kneading machine according to the ratio of 1:1, wherein the temperature is 80 ℃, the stirring speed is 2500 r/min, a surface modifier is sprayed in by an atomizing device and mixed with the nano antibacterial/high-porosity porous powder, the adding amount of the surface modifier is 0.5 wt% of the mass of the nano antibacterial/high-porosity porous powder, and the high-speed mixing is 90 min; the surface modifier is an active organic silicon series surface modifier;
(3) preparing the antibacterial/high-porosity master batch: uniformly mixing the nano antibacterial/high-porosity pore-forming powder subjected to surface modification in the step (2) with resin powder, wherein the resin powder is PP resin powder, the nano antibacterial/high-porosity pore-forming powder accounts for 30 wt% of the whole mass, and the mixed raw materials are subjected to twin-screw extrusion, blending, granulation and extrusion, wherein the processing temperature is 170 ℃ to obtain an antibacterial/high-porosity pore-forming master batch;
(4) drying the antibacterial/high-porosity master batch at the temperature of 100 ℃ for 8 hours; uniformly mixing the antibacterial/high-porosity master batch and basic resin slices in a mass ratio of 1:19, feeding the mixture into a feeder of a spinning machine for melt spinning, wherein the basic resin slices are PP slices, the spinning temperature is 205 ℃, and the antibacterial/high-porosity spun-bonded non-woven fabric is obtained, and the color of the antibacterial/high-porosity fiber is white. The particle size of the obtained nano antibacterial/high-porosity porous material is 90nm through a laser particle analyzer test, the antibacterial effect of the prepared spun-bonded non-woven fabric is tested according to the test standard of GB/T20944.3-2008, the antibacterial effect of escherichia coli, staphylococcus aureus and white entwisteria is 91/90/89, the filtration barrier efficiency is tested according to the test standard of GB/T19083-2010, and a test sample is prepared into an SMS type mask, wherein S is the spun-bonded non-woven fabric disclosed by the invention, M is a melt-blown layer, and the filtration efficiency is 93%.
It can be seen that increasing the pulverizing pressure effectively reduces the particle size of the nanomaterial, but the particle size is too small, the filtration and blocking efficiency is not increased, and the antibacterial/high pore-forming master batch may be caused by too small particle size, uneven pore distribution and lower porosity, so the pulverizing pressure is preferably set to 8 Kg.
Example 5:
a preparation method of a porous non-woven fabric with an antibacterial function comprises the following steps:
(1) selecting titanium dioxide with the particle size of 20nm as a base material, mixing the titanium dioxide with distilled water to prepare a nano titanium dioxide aqueous solution, wherein the concentration of the nano titanium dioxide is 8%, and adding zinc chloride to prepare a mixed solution, wherein the concentration of the zinc chloride is 0.8%; dropwise adding 0.1% sodium hydroxide solution, adjusting the pH value to 6, reacting for 6 hours at 200 ℃ through a hydrothermal kettle, and performing rotary evaporation to obtain zinc-doped titanium dioxide; mixing zinc-doped titanium dioxide and nano silicon dioxide (40nm), and crushing for 2 times under the crushing pressure of 8 kg;
(2) surface modification of nano antibacterial/highly porous powder: carrying out surface modification on the nano antibacterial/high-porosity porous powder by a high-speed kneading machine according to the ratio of 1:1, wherein the temperature is 80 ℃, the stirring speed is 2500 r/min, a surface modifier is sprayed in by an atomizing device and mixed with the nano antibacterial/high-porosity porous powder, the adding amount of the surface modifier is 0.5 wt% of the mass of the nano antibacterial/high-porosity porous powder, and the high-speed mixing is 90 min; the surface modifier is an active organic silicon series surface modifier;
(3) preparing the antibacterial/high-porosity master batch: uniformly mixing the nano antibacterial/high-porosity pore-forming powder subjected to surface modification in the step (2) with resin powder, wherein the resin powder is PP resin powder, the nano antibacterial/high-porosity pore-forming powder accounts for 40 wt% of the whole mass, and the mixed raw materials are subjected to twin-screw extrusion, blending, granulation and extrusion, wherein the processing temperature is 170 ℃ to obtain an antibacterial/high-porosity pore-forming master batch;
(4) drying the antibacterial/high-porosity master batch at the temperature of 100 ℃ for 8 hours; uniformly mixing the antibacterial/high-porosity master batch and basic resin slices in a mass ratio of 1:19, feeding the mixture into a feeder of a spinning machine for melt spinning, wherein the basic resin slices are PP slices, the spinning temperature is 205 ℃, and the antibacterial/high-porosity spun-bonded non-woven fabric is obtained, and the color of the antibacterial/high-porosity fiber is white. The particle size of the obtained nano antibacterial/high-porosity porous material is 90nm through a laser particle analyzer test, the antibacterial effect of the prepared spun-bonded non-woven fabric is tested according to the test standard of GB/T20944.3-2008, the antibacterial effect of escherichia coli, staphylococcus aureus and white entwisteria is 96/95/93, the filtration barrier efficiency is tested according to the test standard of GB/T19083-2010, and a test sample is prepared into an SMS type mask, wherein S is the spun-bonded non-woven fabric disclosed by the invention, M is a melt-blown layer, and the filtration efficiency is 97%.
Example 6:
a preparation method of a porous non-woven fabric with an antibacterial function comprises the following steps:
(1) selecting titanium dioxide with the particle size of 20nm as a base material, mixing the titanium dioxide with distilled water to prepare a nano titanium dioxide aqueous solution, wherein the concentration of the nano titanium dioxide is 8%, and adding zinc chloride to prepare a mixed solution, wherein the concentration of the zinc chloride is 0.8%; dropwise adding 0.1% sodium hydroxide solution, adjusting the pH value to 6, reacting for 6 hours at 200 ℃ through a hydrothermal kettle, and performing rotary evaporation to obtain zinc-doped titanium dioxide; mixing zinc-doped titanium dioxide and nano silicon dioxide (40nm), and crushing for 2 times under the crushing pressure of 8 kg;
(2) surface modification of nano antibacterial/highly porous powder: carrying out surface modification on the nano antibacterial/high-porosity porous powder by a high-speed kneading machine according to the ratio of 1:1, wherein the temperature is 80 ℃, the stirring speed is 2500 r/min, a surface modifier is sprayed in by an atomizing device and mixed with the nano antibacterial/high-porosity porous powder, the adding amount of the surface modifier is 0.5 wt% of the mass of the nano antibacterial/high-porosity porous powder, and the high-speed mixing is 90 min; the surface modifier is an active organic silicon series surface modifier;
(3) preparing the antibacterial/high-porosity master batch: uniformly mixing the nano antibacterial/high-porosity pore-forming powder subjected to surface modification in the step (2) with resin powder, wherein the resin powder is PP resin powder, the nano antibacterial/high-porosity pore-forming powder accounts for 50 wt% of the whole mass, and the mixed raw materials are subjected to twin-screw extrusion, blending, granulation and extrusion, wherein the processing temperature is 170 ℃ to obtain an antibacterial/high-porosity pore-forming master batch;
(4) drying the antibacterial/high-porosity master batch at the temperature of 100 ℃ for 8 hours; uniformly mixing the antibacterial/high-porosity master batch and basic resin slices in a mass ratio of 1:19, feeding the mixture into a feeder of a spinning machine for melt spinning, wherein the basic resin slices are PP slices, the spinning temperature is 205 ℃, and the antibacterial/high-porosity spun-bonded non-woven fabric is obtained, and the color of the antibacterial/high-porosity fiber is white. The particle size of the obtained nano antibacterial/high-porosity porous material is 90nm through a laser particle analyzer test, the antibacterial effect of the prepared spun-bonded non-woven fabric is tested according to the test standard of GB/T20944.3-2008, the antibacterial effect of escherichia coli, staphylococcus aureus and white entwisteria is 100/100/100, the filtration barrier efficiency is tested according to the test standard of GB/T19083-2010, and a test sample is prepared into an SMS type mask, wherein S is the spun-bonded non-woven fabric disclosed by the invention, M is a melt-blown layer, and the filtration efficiency is 99%.
Example 7:
a preparation method of a porous non-woven fabric with an antibacterial function comprises the following steps:
(1) selecting titanium dioxide with the particle size of 20nm as a base material, mixing the titanium dioxide with distilled water to prepare a nano titanium dioxide aqueous solution, wherein the concentration of the nano titanium dioxide is 8%, and adding zinc chloride to prepare a mixed solution, wherein the concentration of the zinc chloride is 0.8%; dropwise adding 0.1% sodium hydroxide solution, adjusting the pH value to 6, reacting for 6 hours at 200 ℃ through a hydrothermal kettle, and performing rotary evaporation to obtain zinc-doped titanium dioxide; mixing zinc-doped titanium dioxide and nano silicon dioxide (40nm), and crushing for 2 times under the crushing pressure of 8 kg;
(2) surface modification of nano antibacterial/highly porous powder: carrying out surface modification on the nano antibacterial/high-porosity porous powder by a high-speed kneader according to the ratio of 10:1, wherein the temperature is 80 ℃, the stirring speed is 2500 r/min, a surface modifier is sprayed in by an atomizing device and mixed with the nano antibacterial/high-porosity porous powder, the addition amount of the surface modifier is 0.5 wt% of the mass of the nano antibacterial/high-porosity porous powder, and the high-speed mixing is 90 min; the surface modifier is an active organic silicon series surface modifier;
(3) preparing the antibacterial/high-porosity master batch: uniformly mixing the nano antibacterial/high-porosity pore-forming powder subjected to surface modification in the step (2) with resin powder, wherein the resin powder is PP resin powder, the nano antibacterial/high-porosity pore-forming powder accounts for 50 wt% of the whole mass, and the mixed raw materials are subjected to twin-screw extrusion, blending, granulation and extrusion, wherein the processing temperature is 170 ℃ to obtain an antibacterial/high-porosity pore-forming master batch;
(4) drying the antibacterial/high-porosity master batch at the temperature of 100 ℃ for 8 hours; uniformly mixing the antibacterial/high-porosity master batch and basic resin slices in a mass ratio of 1:19, feeding the mixture into a feeder of a spinning machine for melt spinning, wherein the basic resin slices are PP slices, the spinning temperature is 205 ℃, and the antibacterial/high-porosity spun-bonded non-woven fabric is obtained, and the color of the antibacterial/high-porosity fiber is white. The particle size of the obtained nano antibacterial/high-porosity porous material is 90nm through a laser particle analyzer test, the antibacterial effect of the prepared spun-bonded non-woven fabric is tested according to the test standard of GB/T20944.3-2008, the antibacterial effect of escherichia coli, staphylococcus aureus and white entwisteria is 100/100/100, the filtration barrier efficiency is tested according to the test standard of GB/T19083-2010, and a test sample is prepared into an SMS type mask, wherein S is the spun-bonded non-woven fabric disclosed by the invention, M is a melt-blown layer, and the filtration efficiency is 94%.
Example 8:
a preparation method of a porous non-woven fabric with an antibacterial function comprises the following steps:
(1) selecting titanium dioxide with the particle size of 20nm as a base material, mixing the titanium dioxide with distilled water to prepare a nano titanium dioxide aqueous solution, wherein the concentration of the nano titanium dioxide is 8%, and adding zinc chloride to prepare a mixed solution, wherein the concentration of the zinc chloride is 0.8%; dropwise adding 0.1% sodium hydroxide solution, adjusting the pH value to 6, reacting for 6 hours at 200 ℃ through a hydrothermal kettle, and performing rotary evaporation to obtain zinc-doped titanium dioxide; mixing zinc-doped titanium dioxide and nano silicon dioxide (40nm), and crushing for 2 times under the crushing pressure of 8 kg;
(2) surface modification of nano antibacterial/highly porous powder: carrying out surface modification on the nano antibacterial/high-porosity porous powder by a high-speed kneading machine according to the ratio of 1:10, wherein the temperature is 80 ℃, the stirring speed is 2500 r/min, a surface modifier is sprayed in by an atomizing device and mixed with the nano antibacterial/high-porosity porous powder, the addition amount of the surface modifier is 0.5 wt% of the mass of the nano antibacterial/high-porosity porous powder, and the high-speed mixing is 90 min; the surface modifier is an active organic silicon series surface modifier;
(3) preparing the antibacterial/high-porosity master batch: uniformly mixing the nano antibacterial/high-porosity pore-forming powder subjected to surface modification in the step (2) with resin powder, wherein the resin powder is PP resin powder, the nano antibacterial/high-porosity pore-forming powder accounts for 50 wt% of the whole mass, and the mixed raw materials are subjected to twin-screw extrusion, blending, granulation and extrusion, wherein the processing temperature is 170 ℃ to obtain an antibacterial/high-porosity pore-forming master batch;
(4) drying the antibacterial/high-porosity master batch at the temperature of 100 ℃ for 8 hours; uniformly mixing the antibacterial/high-porosity master batch and basic resin slices in a mass ratio of 1:19, feeding the mixture into a feeder of a spinning machine for melt spinning, wherein the basic resin slices are PP slices, the spinning temperature is 205 ℃, and the antibacterial/high-porosity spun-bonded non-woven fabric is obtained, and the color of the antibacterial/high-porosity fiber is white. The particle size of the obtained nano antibacterial/high-porosity porous material is 90nm through a laser particle analyzer test, the antibacterial effect of the prepared spun-bonded non-woven fabric is tested according to the test standard of GB/T20944.3-2008, the antibacterial effect of escherichia coli, staphylococcus aureus and white entwisteria is 93/95/94, the filtration barrier efficiency is tested according to the test standard of GB/T19083-2010, and a test sample is prepared into an SMS type mask, wherein S is the spun-bonded non-woven fabric disclosed by the invention, M is a melt-blown layer, and the filtration efficiency is 99%.
Example 9:
a preparation method of a porous non-woven fabric with an antibacterial function comprises the following steps:
(1) selecting titanium dioxide with the particle size of 20nm as a base material, mixing the titanium dioxide with distilled water to prepare a nano titanium dioxide aqueous solution, wherein the concentration of the nano titanium dioxide is 8%, and adding zinc chloride to prepare a mixed solution, wherein the concentration of the zinc chloride is 0.8%; dropwise adding 0.1% sodium hydroxide solution, adjusting the pH value to 6, reacting for 6 hours at 200 ℃ through a hydrothermal kettle, and performing rotary evaporation to obtain zinc-doped titanium dioxide; mixing zinc-doped titanium dioxide and nano silicon dioxide (40nm), and crushing for 2 times under the crushing pressure of 8 kg;
(2) surface modification of nano antibacterial/highly porous powder: carrying out surface modification on the nano antibacterial/high-porosity porous powder by a high-speed kneading machine according to the ratio of 5:1, wherein the temperature is 80 ℃, the stirring speed is 2500 r/min, a surface modifier is sprayed in by an atomizing device and mixed with the nano antibacterial/high-porosity porous powder, the adding amount of the surface modifier is 0.5 wt% of the mass of the nano antibacterial/high-porosity porous powder, and the high-speed mixing is 90 min; the surface modifier is an active organic silicon series surface modifier;
(3) preparing the antibacterial/high-porosity master batch: uniformly mixing the nano antibacterial/high-porosity pore-forming powder subjected to surface modification in the step (2) with resin powder, wherein the resin powder is PP resin powder, the nano antibacterial/high-porosity pore-forming powder accounts for 50 wt% of the whole mass, and the mixed raw materials are subjected to twin-screw extrusion, blending, granulation and extrusion, wherein the processing temperature is 170 ℃ to obtain an antibacterial/high-porosity pore-forming master batch;
(4) drying the antibacterial/high-porosity master batch at the temperature of 100 ℃ for 8 hours; uniformly mixing the antibacterial/high-porosity master batch and basic resin slices in a mass ratio of 1:19, feeding the mixture into a feeder of a spinning machine for melt spinning, wherein the basic resin slices are PP slices, the spinning temperature is 205 ℃, and the antibacterial/high-porosity spun-bonded non-woven fabric is obtained, and the color of the antibacterial/high-porosity fiber is white. The particle size of the obtained nano antibacterial/high-porosity porous material is 90nm through a laser particle analyzer test, the antibacterial effect of the prepared spun-bonded non-woven fabric is tested according to the test standard of GB/T20944.3-2008, the antibacterial effect of escherichia coli, staphylococcus aureus and white entwisteria is 100/100/100, the filtration barrier efficiency is tested according to the test standard of GB/T19083-2010, and a test sample is prepared into an SMS type mask, wherein S is the spun-bonded non-woven fabric disclosed by the invention, M is a melt-blown layer, and the filtration efficiency is 97%.
Example 10:
a preparation method of a porous non-woven fabric with an antibacterial function comprises the following steps:
(1) selecting titanium dioxide with the particle size of 20nm as a base material, mixing the titanium dioxide with distilled water to prepare a nano titanium dioxide aqueous solution, wherein the concentration of the nano titanium dioxide is 8%, and adding zinc chloride to prepare a mixed solution, wherein the concentration of the zinc chloride is 0.8%; dropwise adding 0.1% sodium hydroxide solution, adjusting the pH value to 6, reacting for 6 hours at 200 ℃ through a hydrothermal kettle, and performing rotary evaporation to obtain zinc-doped titanium dioxide; mixing zinc-doped titanium dioxide and nano silicon dioxide (40nm), and crushing for 2 times under the crushing pressure of 8 kg;
(2) surface modification of nano antibacterial/highly porous powder: carrying out surface modification on the nano antibacterial/high-porosity porous powder by a high-speed kneading machine according to the ratio of 1:5, wherein the temperature is 80 ℃, the stirring speed is 2500 r/min, a surface modifier is sprayed in by an atomizing device and mixed with the nano antibacterial/high-porosity porous powder, the addition amount of the surface modifier is 0.5 wt% of the mass of the nano antibacterial/high-porosity porous powder, and the high-speed mixing is 90 min; the surface modifier is an active organic silicon series surface modifier;
(3) preparing the antibacterial/high-porosity master batch: uniformly mixing the nano antibacterial/high-porosity pore-forming powder subjected to surface modification in the step (2) with resin powder, wherein the resin powder is PP resin powder, the nano antibacterial/high-porosity pore-forming powder accounts for 50 wt% of the whole mass, and the mixed raw materials are subjected to twin-screw extrusion, blending, granulation and extrusion, wherein the processing temperature is 170 ℃ to obtain an antibacterial/high-porosity pore-forming master batch;
(4) drying the antibacterial/high-porosity master batch at the temperature of 100 ℃ for 8 hours; uniformly mixing the antibacterial/high-porosity master batch and basic resin slices in a mass ratio of 1:19, feeding the mixture into a feeder of a spinning machine for melt spinning, wherein the basic resin slices are PP slices, the spinning temperature is 205 ℃, and the antibacterial/high-porosity spun-bonded non-woven fabric is obtained, and the color of the antibacterial/high-porosity fiber is white. The particle size of the obtained nano antibacterial/high-porosity porous material is 90nm through a laser particle analyzer test, the antibacterial effect of the prepared spun-bonded non-woven fabric is tested according to the test standard of GB/T20944.3-2008, the antibacterial effect of escherichia coli, staphylococcus aureus and white entwisteria is 96/98/97, the filtration barrier efficiency is tested according to the test standard of GB/T19083-2010, and a test sample is prepared into an SMS type mask, wherein S is the spun-bonded non-woven fabric disclosed by the invention, M is a melt-blown layer, and the filtration efficiency is 99%.
The invention provides a preparation method of a porous non-woven fabric with an antibacterial function, which comprises the following steps: (1) preparing zinc-doped titanium dioxide nano powder; (2) compounding zinc-doped titanium dioxide nano powder and a pore-foaming agent; (3) preparing the antibacterial/high-porosity master batch: uniformly mixing the nano antibacterial/high-porosity pore-forming powder subjected to surface modification in the step (2) with resin powder, and extruding the mixed raw materials by twin-screw extrusion, blending, granulating and extruding to obtain antibacterial/high-porosity pore-forming master batches; (4) drying the antibacterial/high-porosity master batch, uniformly mixing the dried antibacterial/high-porosity master batch with resin slices, feeding the mixture into a feeder of a spinning machine for melt spinning, and obtaining the antibacterial/high-porosity spun-bonded non-woven fabric through a stretching-web forming-consolidation forming process. The invention prepares the functional master batch through the preparation of nano antibacterial/high pore-foaming powder and the surface modification and carries out spinning to prepare the white antibacterial/high pore-foaming spun-bonded non-woven fabric.
The mask outer layer is arranged through a special material or structure, the overall filtering performance of the mask can be improved undoubtedly due to the filtering function, the porosity of fibers can be increased on the basis of not changing the fiber diameter through the high-pore-forming structure, and therefore the filtering performance of the spun-bonded non-woven fabric is improved.
It should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (10)
1. A preparation method of a porous non-woven fabric with an antibacterial function is characterized by comprising the following steps: comprises the steps of (a) preparing a mixture of a plurality of raw materials,
preparing nano antibacterial/high pore-foaming powder: mixing zinc-doped titanium dioxide and nano silicon dioxide in a jet milling mode, wherein the jet milling pressure is 7-9 kg;
surface modification of nano antibacterial/highly porous powder: carrying out surface modification on the nano antibacterial/high-porosity pore-forming powder by a high-speed kneading machine, wherein the temperature is 60-80 ℃, the stirring speed is 1500-2500 r/min, a surface modifier is sprayed in by an atomizing device and mixed with the nano antibacterial/high-porosity pore-forming powder, the adding amount of the surface modifier is 0.5-1 wt% of the mass of the nano antibacterial/high-porosity pore-forming powder, and the high-speed mixing is 40-60 min;
preparing the antibacterial/high-porosity master batch: uniformly mixing the surface-modified nano antibacterial/high-porosity pore-forming powder with resin powder, wherein the nano antibacterial/high-porosity pore-forming powder accounts for 30-50 wt% of the whole mass, and extruding the mixed raw materials through twin-screw extrusion, blending, granulating and extruding to obtain antibacterial/high-porosity pore-forming master batches;
drying the antibacterial/high-porosity master batch at the temperature of 120-150 ℃ for 3-6 h;
and uniformly mixing the antibacterial/high-porosity master batches with the resin slices, and feeding the mixture into a feeder of a spinning machine through a separate metering device for spinning to obtain the antibacterial/high-porosity spun-bonded non-woven fabric.
2. The method for preparing a porous non-woven fabric having an antibacterial function according to claim 1, wherein: the preparation method of the zinc-doped titanium dioxide comprises the following steps,
selecting titanium dioxide with the particle size of 10-20 nm as a base material, mixing the base material with distilled water to prepare a nano titanium dioxide aqueous solution, wherein the concentration of the nano titanium dioxide is 5-15%, and adding zinc chloride to prepare a mixed solution, wherein the concentration of the zinc chloride is 0.1-3%;
dropwise adding 0.1% sodium hydroxide solution, adjusting the pH value to 6-10, reacting for 2-10 h at 120-220 ℃ through a hydrothermal kettle, and performing rotary evaporation to obtain the zinc-doped titanium dioxide.
3. A method for preparing a porous non-woven fabric having an antibacterial function according to claim 1 or 2, characterized in that: the jet milling mode is characterized in that the number of jet milling is 2.
4. A method for preparing a porous non-woven fabric having an antibacterial function according to claim 1 or 2, characterized in that: the zinc-doped titanium dioxide and the nano silicon dioxide are mixed, wherein the mass ratio of the zinc-doped titanium dioxide to the nano silicon dioxide is 10: 1-1: 10.
5. The method for preparing a porous non-woven fabric with an antibacterial function according to claim 4, wherein the method comprises the following steps: the particle size of the nano silicon dioxide is 20-60 nm.
6. A method for preparing a porous non-woven fabric having an antibacterial function according to claim 1 or 2, characterized in that: the surface modifier comprises one or more of active organosilicon series surface modifiers or titanate series surface modifiers.
7. The method for preparing a porous non-woven fabric with an antibacterial function according to claim 1, which is characterized in that: the resin powder is one or more of PP, PBT and PET powder.
8. The method for preparing a porous non-woven fabric with an antibacterial function according to claim 1, which is characterized in that: the basic resin slice is a spinning-grade resin slice and comprises one or more of PP, PBT and PET resin slices.
9. The method for preparing a porous non-woven fabric with an antibacterial function according to claim 1, which is characterized in that: in the spinning process, the spinning temperature is 170-290 ℃.
10. The method for preparing a porous non-woven fabric with an antibacterial function according to claim 1, which is characterized in that: the monofilament titer of the antibacterial/high-porosity fiber is 5-20 um.
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