Thermal insulation tent fabric and preparation method thereof
Technical Field
The invention relates to the technical field of outdoor tents, in particular to the field of IPC D06N3/06, and more particularly relates to a heat insulation tent fabric and a preparation method thereof.
Background
Tents are an outdoor travel, camping, and must be prepared prop for weather, sunlight, and to provide temporary occupancy. However, the outdoor day and night temperature difference is large, so that the problem that the temperature in the tent is low due to sudden drop of the temperature at night, which is difficult to endure due to the fact that the tent is exposed in the morning, is easy to occur, and the user experience is affected. Therefore, a novel tent fabric is needed, which can insulate heat in daytime and heat at night.
In order to solve the problems, aerogel is mostly used for being compounded with tent fabric, so that the heat insulation effect of the fabric can be improved. In the prior art, the use method of aerogel in tent products is mostly an interlayer method, for example, chinese patent application document CN113774682A discloses that polyimide modified silica aerogel is used as a coating, the coating is coated between two layers of polyurethane modified polybenzimidazole fiber fabrics, and a heat-insulating tent composite fabric is prepared through hot pressing; chinese patent application CN111114057a discloses a method of adhering two adhesive coated cloths to the surface of an aerogel-fiber composite tent fabric; chinese patent application CN217293824U discloses a method for preparing a thermal fabric with composite phase change by filling aerogel between a common fabric and a fabric finished with a phase change material. The fabric realized by the method has good heat insulation effect, but the fabric with the heat insulation effect achieved by designing the double-layer fabric cannot meet the light-weight requirement of a tent, and the phenomenon that aerogel falls off and powder is easy to occur, so that the health of a user is influenced.
Secondly, a coating method, such as 'preparation and performance study of SiO 2 aerogel thermal insulation coated fabrics' of Donghua university He Xiangmei, is adopted to disperse SiO 2 aerogel in a polyacrylate adhesive, and finally the mixture is coated on cotton fabrics, so that the thermal insulation effect of the fabrics is improved, the lightweight requirement can be met, but the thermal conductivity of the polyacrylic resin is far higher than that of the fabrics, the air and moisture permeability is poor, and the inside of the tent is easy to be heavy and stuffy. Chinese patent CN112553914A discloses a preparation method of a waterproof thermal-insulation coating agent, hydrophobic SiO 2 aerogel is dispersed in a polyvinylidene fluoride-hexafluoropropylene/solvent/water system, micro-nano composite micropores formed by separating PVDF-HFP/hydrophobic SiO 2 aerogel particles in a water phase provide channels for water vapor scattered by a human body, so that the water vapor has good moisture permeability, the problem of ventilation and moisture permeability existing in the prior art can be solved by the method of phase separation pore forming, but the hydrophobic SiO 2 aerogel is dispersed in the solvent system, so that solvent molecules are easy to enter the holes of the aerogel to cause the damage of the nano porous structure of the aerogel, and the thermal insulation effect of the fabric is affected.
Therefore, although the heat insulation and light weight effects of the fabric can be improved by compositing the aerogel and the tent fabric, the problem of 'early heat and late cold' of the traditional tent is solved, but the composite of the aerogel and the fabric is realized by a multi-purpose interlayer method in the prior art, but the interlayer method cannot meet the light weight requirement of the tent, dust is easy to appear, and the moisture permeability and the heat insulation effects of the fabric are easy to influence by a coating method.
Disclosure of Invention
In order to solve the problems, the novel heat-insulating tent fabric with heat-insulating function, which is composed of the waterproof finishing agent, the aerogel heat-insulating finishing agent and the light-absorbing and heating antibacterial fabric, has good heat-insulating effect, can solve the problems that the interior of a tent is stuffy and difficult to resist in the morning due to insolation and the interior temperature is lower due to sudden temperature drop at night, integrates the functions required by a series of outdoor supplies such as ultraviolet resistance, far infrared emission, antibacterial and mildew-proof self-cleaning, water resistance, ventilation and moisture permeability and the like, and greatly improves the use comfort of people.
In order to achieve the aim, the first subsection of the invention provides a heat-insulating tent fabric, which sequentially comprises a waterproof layer, an aerogel heat-insulating layer and a light-absorbing heat-generating antibacterial fabric from outside to inside.
Preferably, the waterproof layer is one or more of a paraffin waterproof coating, an organic silicon resin waterproof coating, a fluorocarbon waterproof coating, a fluorine-free waterproof coating and a PVC waterproof coating.
In order to improve the water resistance of the tent, it is further preferable that the waterproof layer is a waterproof silicone resin coating, so that the fabric has excellent water resistance. Still more preferably, the thickness of the waterproof coating of the organic silicon resin is 10-100 μm, so that the waterproof function of the fabric is achieved, and the problem that the aerogel heat-insulating coating is not resistant to water washing is solved.
Further preferably, the thickness of the silicone resin waterproof coating is 30 μm.
Further preferably, the organic silicon resin waterproof coating is prepared by impregnating a light-absorbing and heat-generating antibacterial fabric with waterproof finishing liquid, wherein the waterproof finishing liquid is organic silicon resin, and the dynamic viscosity is 300-3500cps.
Further preferably, the silicone resin is purchased from Shenzhen synchronous electronic materials Inc., model TB-1577.
Preferably, the aerogel heat insulation layer is prepared by coating an aerogel heat insulation finishing agent on a light-absorbing and heat-generating antibacterial fabric, and the aerogel heat insulation finishing agent comprises the following raw materials in parts by weight: 10-50 parts of aerogel powder, 5-20 parts of titanium dioxide, 10-60 parts of aqueous emulsion, 0.5-5 parts of dispersing agent, 0.5-5 parts of defoaming agent, 1-3 parts of thickening agent, 0.1-1 part of mildew inhibitor, 0.1-1 part of pH regulator and 120-200 parts of water.
Preferably, the aerogel powder comprises one or more of carbon aerogel, silica aerogel, graphene oxide aerogel, fullerene aerogel, fiber/silica aerogel, aluminum oxide aerogel, titanium oxide aerogel, copper oxide aerogel, zirconium oxide aerogel and polymer aerogel.
Further preferably, the aerogel powder is silica aerogel.
Further preferably, the silica aerogel is a hydrophobic silica aerogel.
Further preferably, the aerogel heat insulation finishing agent comprises the following preparation raw materials in parts by weight: 35-45 parts of aerogel powder, 10-20 parts of titanium dioxide, 25-50 parts of aqueous emulsion, 0.5-5 parts of dispersing agent, 0.5-5 parts of defoaming agent, 1-3 parts of thickening agent, 0.1-1 part of mildew inhibitor, 0.1-1 part of pH regulator and 120-200 parts of water.
Further preferably, the average particle diameter of the hydrophobic silica aerogel is 1 to 100. Mu.m, and still further preferably, the average particle diameter of the hydrophobic silica aerogel is 5 to 50. Mu.m.
Silica aerogel has good heat insulation effect, but has a certain brittleness. In addition, the heat insulation effect is affected by the small particle size of the silica aerogel, and agglomeration is more likely to occur when the addition amount is too large, so that the heat insulation effect is reduced; too large a particle size tends to roughen the coating. In the invention, the hydrophobic silica aerogel with the average particle size of 5-50 mu m is selected, the adding amount is controlled to be 35-45 parts, the silica aerogel with specific particle size and adding amount has better dispersibility in a macromolecular chain, is not easy to agglomerate, effectively improves the heat insulation and sound insulation effects of the coating, and is not easy to crack.
Further preferably, the thermal conductivity of the hydrophobic silica aerogel is less than or equal to 0.026W/(m.K); still more preferably, the hydrophobic silica aerogel has a thermal conductivity of 0.013W/(m.K) or less and is purchased from Hebei Co., ltd.
Preferably, the titanium dioxide is modified macroporous titanium dioxide microsphere, and the preparation method comprises the following steps:
(1) Tetrabutyl titanate and glacial acetic acid are added into absolute ethyl alcohol to be stirred;
(2) Stirring for 12h, adding PMMA microspheres, aging at 40 ℃ for 24h, cooling to room temperature, and drying;
(3) Placing the mixture in a muffle furnace for roasting for 2 hours at 300 ℃ and for roasting for 3 hours at 500 ℃ to obtain the macroporous titanium dioxide microspheres with the particle size of 0.5-10 mu m and the average pore diameter of 0.4-2 mu m.
The PMMA microspheres are polymethyl methacrylate microspheres with an average particle size of 5 mu m and are purchased from North Korea nanotechnology Co.
Further preferably, the mass ratio of the aerogel powder to the modified macroporous titanium dioxide microspheres is (2-3): 1.
The reflection effect of the titanium dioxide can improve the heat insulation effect of the fabric, but when the addition amount of the titanium dioxide is too large, the heat insulation effect is reduced because the titanium dioxide belongs to metal ions and has certain heat conductivity. According to the invention, the aerogel and the titanium dioxide are compounded in a specific amount, the modified macroporous titanium dioxide microsphere compensates the infrared emission capability of the aerogel, the heat insulation effect of the fabric is further improved, and the fabric also has certain antibacterial, ultraviolet-resistant and self-cleaning capabilities. In addition, the surface of the macroporous structure of the modified macroporous titanium dioxide microsphere can be provided with a micro-scale and nano-scale pore canal structure, and the modified macroporous titanium dioxide microsphere has the functions of unidirectional moisture guiding and ventilation.
Preferably, the aqueous emulsion comprises one or more of an acrylic emulsion, an acrylate emulsion, a polyacrylic emulsion, a polyurethane emulsion, and a silicone emulsion.
Further preferably, the aqueous emulsion is an acrylic emulsion, a polyurethane emulsion.
Further preferably, the acrylic emulsion contains silicone and has a dynamic viscosity (25 ℃) of 50 to 500 mPas
Still more preferably, the acrylic emulsion has a dynamic viscosity (25 ℃) of 200 to 350 mPas, and is commercially available from Shanghai Baituo New Material Co., ltd., product number 48262.
Further preferably, the dynamic viscosity (25 ℃) of the polyurethane emulsion is 200 to 500 mPas.
Still more preferably, the polyurethane emulsion has a dynamic viscosity (25 ℃) of 210 mPas and is available from Guangzhou Ruilin New Material Co., ltd., model RL-8402.
In order to improve the moisture permeability of the fabric, it is further preferable that the mass ratio of the acrylic emulsion to the polyurethane emulsion is (4-6): and 3, compounding a specific amount of acrylic emulsion and polyurethane emulsion, so that the fabric has good adhesive force, and the waterproof property and the moisture permeability are regulated, so that the moisture permeability of the fabric is improved and the durability of the coating is improved on the basis of certain waterproof property of the fabric. In addition, polyurethane is easy to form a compact film, so that the heat insulation effect of the fabric is affected, under the combined action of a specific amount of the polyurethane and the silicon dioxide aerogel, the titanium dioxide and the silicon dioxide are uniformly dispersed in an extended macromolecular chain, the heat insulation effect of the fabric is improved, and the macromolecular film can share a part of external force, so that the mechanical property of the fabric is improved.
Still more preferably, the mass ratio of the acrylic emulsion to the polyurethane emulsion is 5:3.
Preferably, the dispersing agent is an aqueous system dispersing agent.
Further preferably, the dispersant comprises one or more of dispersant 5040, EDO-2800, BYK-191, YL-5040, S590, BYK-110.
Further preferably, the dispersant is BYK-191 purchased from Meixin trade in Buddha City, fleenship.
Preferably, the defoamer is an aqueous system defoamer.
Further preferably, the defoamer comprises one or more of BOF-defoamer TEGO Airex 902W,TEGO Airex 901W,Foarmx 822,Foarmx 825,BYK-024, BYK-028,FoamStar ST 2400.
Further preferably, the defoamer is BYK-024 purchased from Guangzhou national source of lucky new energy Co.
Preferably, the thickener is a thickener for aqueous systems.
Further preferably, the thickener comprises one or more of carboxymethylcellulose, BP-188X, coapur 830W, ming Ling PUR44, hamming HX6008, BYK420, viscoPlus3060, SN-THICKENER 621N.
Further preferably, the thickener is carboxymethyl cellulose.
In order to improve the heat insulation effect of the heat insulation layer, it is further preferable that the mass ratio of the carboxymethyl cellulose to the aerogel powder is 1: (15-35), the addition amount of the aerogel powder is too large, the viscosity of the slurry is too large, the aerogel particles occupy the original air position, the internal air is reduced, the heat insulation effect is reduced, the specific amount of carboxymethyl cellulose and the aerogel powder act together, the dispersion of the aerogel is improved, the viscosity of the system is regulated, the adhesion force to the fabric and the heat insulation effect of the heat insulation layer are improved, the leveling property of the heat insulation layer is good, and the heat insulation layer has a certain performance of resisting hot water at 100 ℃. Still more preferably, the mass ratio of the carboxymethyl cellulose to the aerogel powder is 1:20.
Preferably, the mildew preventive is an aqueous system mildew preventive.
Further preferably, the mildew preventive comprises one or more of Langsheng VFB1, FL-A26, dow ROCIMA 623,AQUCAR BP 100MUP,KATHON LX-150.
Further preferably, the mildew preventive is KATHON LX-150 purchased from Shanghai Ji Shengya (Shenzhen) technology Co., ltd.
Preferably, the pH regulator is a conventional regulator.
Further preferably, the pH regulator comprises one or more of BG 95, AMP-95 and DeuAdd MA-95.
Further preferably, the pH adjustor is AMP-95, purchased from Henan Utility chemical products Co.
Preferably, the aerogel insulation layer has a thickness of 30-300 μm.
Further preferably, the aerogel insulation layer has a thickness of 50 to 150 μm, and still further preferably, the aerogel insulation layer has a thickness of 100 μm. The waterproof layer with specific thickness is combined, the air and the water vapor can pass through moderately between the two layers, the air permeability and the moisture permeability are prevented from being poor due to the fact that the coating is too thick on the premise of guaranteeing the heat insulation effect, the durability deterioration caused by the fact that the water vapor is remained in the layer is improved, the waterproof tent has excellent waterproof effect, and the light weight requirement of the tent can be met.
Preferably, the material of the light-absorbing and heat-generating antibacterial fabric comprises one or more of cesium tungsten bronze antibacterial heat-generating yarns, carbon antibacterial heat-generating yarns and zirconium carbide antibacterial heat-generating yarns.
In order to improve the warm-keeping effect of the tent, it is further preferable that the light-absorbing and heat-generating antibacterial fabric is made of cesium tungsten bronze antibacterial heat-generating yarns and 40S yarns. The antibacterial heating fabric can efficiently absorb human infrared rays at night to heat, further improve the warm-keeping effect inside the tent at night, and can emit far infrared rays, so that the sleep quality is improved, the color of the fabric is lighter relative to other kinds of light-absorbing heating fibers, and the fabric meets market demands.
The invention provides a preparation method of a tent fabric with heat insulation and preservation functions, which comprises the following steps:
(1) And (3) treating the light-absorbing and heating antibacterial fabric: wiping the light-absorbing and heat-generating antibacterial fabric with alcohol and drying to realize the water and oil removal treatment of the surface of the fabric;
(2) Aerogel heat insulation finishing agent preparation: preparing a solution A with the weight percent of 1-5% by using 50% of dispersing agent and water, mixing and dispersing 20% of aerogel powder with the solution A, wherein the rotating speed is 500-1500rpm, the time is 10-30min, obtaining a pre-dispersion liquid, mixing all the pre-dispersion liquid and 40% of aqueous emulsion, dispersing for 5-10min at the rotating speed of 1000-2000rpm, adding all the rest components, dispersing for 30-40min at the rotating speed of 1500-4000rpm, adding all the thickening agent, and dispersing for 10-20min at the rotating speed of 1000-2000rpm, thus obtaining the aerogel heat insulation finishing agent;
(3) Preparing an aerogel heat insulation layer: coating the aerogel finishing agent on the surface of the fabric by using a spraying or blade coating method, drying for 2-4 hours at normal temperature, and then drying for 1-2 hours at 70-80 ℃ in an oven;
(4) Preparing a waterproof layer: coating waterproof finishing liquid on the surface of the composite fabric for waterproof modification treatment, rolling the composite fabric coated with the waterproof finishing liquid by using a padder, rapidly passing through two rollers under the pressure of 0.2-0.4MPa, and then performing heat setting at the temperature of 50-60 ℃.
The beneficial effects are that:
Compared with the prior art, the three-layer structure composite fabric with the waterproof layer as the surface layer, the aerogel heat insulation layer as the middle layer and the antibacterial light-absorbing and heating fabric as the bottom layer has the advantages that:
1. The waterproof layer serving as the surface layer can endow the fabric with a waterproof function, and solves the problem that the aerogel thermal insulation coating is not resistant to water washing; the aerogel heat insulation layer can play a good role in heat preservation and heat insulation so as to solve the problem of 'early heat and late cold' of the traditional tent; the antibacterial heating fabric serving as the bottom layer can absorb infrared rays in daytime, block the infrared rays from entering, further improve the heat insulation effect on the basis of the heat insulation layer, emit far infrared rays, and contribute to improving sleeping quality.
2. The aerogel heat insulation layer with the thickness of 50-150 mu m is combined with the waterproof coating with the thickness of 10-100 mu m, so that the air permeability and the moisture permeability are prevented from being deteriorated due to the fact that the coating is too thick on the premise of guaranteeing the heat insulation effect, and meanwhile, the waterproof coating has an excellent waterproof effect.
3. The aerogel heat insulation layer used as the middle layer adopts hydrophobic silica aerogel with the average particle diameter of 5-50 mu m, and simultaneously controls the addition amount, thereby effectively improving the heat insulation and sound insulation effects of the coating, being not easy to crack, and avoiding the inconvenience in application caused by too thick and heavy fabric.
4. The aerogel heat insulation layer contains macroporous titanium dioxide microspheres, and the mass ratio of the aerogel powder to the modified macroporous titanium dioxide microspheres is (2-3): 1, the heat insulation effect is further improved, and the heat insulation material also has the functions of antibiosis, ultraviolet resistance, self-cleaning, unidirectional moisture conduction and ventilation.
5. The mass ratio of the film-forming emulsion acrylic emulsion to the polyurethane emulsion of the aerogel heat insulation layer is (4-6): 3, the adhesive force to the fabric is improved, the moisture permeability of the fabric is improved on the basis of certain water resistance, and the heat insulation effect and the mechanical property of the fabric are further improved.
6. The mass ratio of thickener carboxymethyl cellulose to aerogel powder in the aerogel heat insulation layer preparation raw material is 1: (15-35), has better adhesive force and heat insulation effect, better leveling property and certain 100 ℃ hot water resistance.
Detailed Description
Example 1
The first part of the embodiment provides a heat-insulating tent fabric, which sequentially comprises a waterproof layer, an aerogel heat-insulating layer and a light-absorbing, heating and antibacterial fabric from outside to inside.
The waterproof layer is an organic silicon resin waterproof coating with the thickness of 30 mu m.
The organic silicon resin waterproof coating is prepared by impregnating light-absorbing and heating antibacterial fabric with waterproof finishing liquid, wherein the waterproof finishing liquid is organic silicon resin, the dynamic viscosity is 300-3500cps, and the waterproof finishing liquid is purchased from synchronous electronic materials of deep market, model TB-1577.
The aerogel heat insulation layer is prepared by coating an aerogel heat insulation finishing agent on a light-absorbing and heat-generating antibacterial fabric, and the aerogel heat insulation finishing agent comprises the following raw materials in parts by weight: 40 parts of aerogel powder, 15 parts of titanium dioxide, 40 parts of aqueous emulsion, 2 parts of dispersing agent, 1 part of defoaming agent, 2 parts of thickening agent, 0.5 part of mildew inhibitor, 0.5 part of pH regulator and 150 parts of water.
The aerogel powder is hydrophobic silica aerogel, the average particle size is 30 mu m, and the heat conductivity coefficient is 0.013W/(m.K).
The titanium dioxide is modified macroporous titanium dioxide microspheres, and the preparation method comprises the following steps:
(1) Adding 10ml of tetrabutyl titanate into 70ml of absolute ethyl alcohol, stirring, slowly dropwise adding 4ml of glacial acetic acid, and dropwise adding for 15 min;
(2) Stirring for 12h, adding 0.3g PMMA microspheres, aging at 40 ℃ for 24h, cooling to room temperature, and drying;
(3) Placing the mixture in a muffle furnace for roasting for 2 hours at 300 ℃ and for roasting for 3 hours at 500 ℃ to obtain the macroporous titanium dioxide microspheres with the average particle size of 5 mu m and the average pore size of 1 mu m.
The PMMA microspheres are polymethyl methacrylate microspheres with an average particle size of 5 mu m and are purchased from North Korea nanotechnology Co.
The aqueous emulsion comprises the following components in percentage by mass: 3 and polyurethane emulsion.
The dynamic viscosity (25 ℃) of the acrylic emulsion is 200-350 mPa.s, and the acrylic emulsion is purchased from Shanghai Baituo New Material Co., ltd, product number 48262; the dynamic viscosity (25 ℃) of the polyurethane emulsion was 210 mPas and was purchased from Guangzhou Ruilin New Material Co., ltd., model RL-8402.
The dispersing agent is BYK-191 and is purchased from Meixin trade in Buddha city.
The defoamer is BYK-024 and is purchased from Guangzhou national auspicious new energy Co.
The thickener is carboxymethyl cellulose, and is purchased from Qingfengfeng fine materials factory, model HR001.
The mildew preventive is KATHON LX-150, purchased from Shanghai Ji Shengya (Shenzhen) technology Co., ltd.
The pH regulator is AMP-95, which is purchased from Henan Utility chemical products Co.
The thickness of the aerogel heat insulation layer is 100 mu m.
The light-absorbing and heat-generating antibacterial fabric is made of cesium tungsten bronze antibacterial heat-generating yarns, 40S is a yarn count, and the yarn count is purchased from Shandong Wei bridge Innovative group.
The invention provides a preparation method of a tent fabric with heat insulation and preservation functions, which comprises the following steps:
(1) And (3) treating the light-absorbing and heating antibacterial fabric: wiping the light-absorbing and heat-generating antibacterial fabric with alcohol and drying to realize the water and oil removal treatment of the surface of the fabric;
(2) Aerogel heat insulation finishing agent preparation: preparing 50% dispersing agent and water into 2wt% solution A, mixing 20% aerogel powder with the solution A for dispersion, wherein the rotation speed is 1000rpm, the time is 20min, obtaining pre-dispersion liquid, mixing all pre-dispersion liquid and 40% aqueous emulsion, dispersing for 8min at the rotation speed of 1500rpm, adding all the rest components, dispersing for 35min at the rotation speed of 2000rpm, then adding all thickener, dispersing for 15min at the rotation speed of 1500rpm, and obtaining aerogel heat insulation finishing agent;
(3) Preparing an aerogel heat insulation layer: coating the aerogel finishing agent on the surface of the fabric by using a spraying or blade coating method, drying for 2 hours at normal temperature, and then drying for 1 hour at 80 ℃ in an oven;
(4) Preparing a waterproof layer: immersing the composite fabric in the waterproof finishing liquid for waterproof modification treatment, rolling the immersed composite fabric by using a padder, rapidly passing through two rollers under the pressure of 0.2-0.4MPa, and then performing heat setting at the temperature of 60 ℃.
Example 2
Specific embodiment the same as example 1, different from example 1, the aerogel heat insulation finishing agent preparation raw materials comprise, in parts by weight: 35 parts of aerogel powder, 12 parts of titanium dioxide, 25 parts of aqueous emulsion, 1 part of dispersing agent, 0.5 part of defoaming agent, 1 part of thickening agent, 0.1 part of mildew inhibitor, 0.1 part of pH regulator and 120 parts of water;
the aqueous emulsion comprises the following components in percentage by mass: 3 with polyurethane emulsion.
Example 3
Specific embodiment the same as example 1, different from example 1, the aerogel heat insulation finishing agent preparation raw materials comprise, in parts by weight: 45 parts of aerogel powder, 20 parts of titanium dioxide, 50 parts of aqueous emulsion, 4 parts of dispersing agent, 2 parts of defoaming agent, 3 parts of thickening agent, 1 part of mildew inhibitor, 1 part of pH regulator and 200 parts of water;
the aqueous emulsion comprises the following components in percentage by mass: 3 with polyurethane emulsion.
Example 4
Specific embodiment the same as example 1, different from example 1, the aerogel heat insulation finishing agent preparation raw materials comprise, in parts by weight: 35 parts of aerogel powder, 20 parts of titanium dioxide, 40 parts of aqueous emulsion, 2 parts of dispersing agent, 1 part of defoaming agent, 2 parts of thickening agent, 0.5 part of mildew inhibitor, 0.5 part of pH regulator and 150 parts of water.
Example 5
Specific embodiment the same as example 1, different from example 1, the aerogel heat insulation finishing agent preparation raw materials comprise, in parts by weight: 43 parts of aerogel powder, 12 parts of titanium dioxide, 40 parts of aqueous emulsion, 2 parts of dispersing agent, 1 part of defoaming agent, 2 parts of thickening agent, 0.5 part of mildew inhibitor, 0.5 part of pH regulator and 150 parts of water.
Example 6
The specific embodiment is the same as example 1, and the difference from example 1 is that the aqueous emulsion adopted in the preparation of the aerogel heat insulation finishing agent in this example is that the mass ratio is 3:3 and polyurethane emulsion.
Example 7
Specific embodiment the same as in example 1, and different from example 1, the aqueous emulsion adopted in the preparation of aerogel heat insulation finishing agent in this example is mass ratio 7:3 and polyurethane emulsion.
Example 8
Specific embodiment the titanium dioxide used in the preparation of the aerogel heat insulation finishing agent of this example was 500nm in average particle diameter and 30nm in average pore diameter, unlike example 1.
Example 9
Specific embodiment the same as example 1, different from example 1, the aerogel heat insulation finishing agent preparation raw materials comprise, in parts by weight: 40 parts of aerogel powder, 15 parts of titanium dioxide, 40 parts of aqueous emulsion, 2 parts of dispersing agent, 1 part of defoaming agent, 4 parts of thickening agent, 0.5 part of mildew inhibitor, 0.5 part of pH regulator and 148 parts of water.
Example 10
Specific embodiment the same as example 1, different from example 1, the aerogel heat insulation finishing agent preparation raw materials comprise, in parts by weight: 40 parts of aerogel powder, 15 parts of titanium dioxide, 40 parts of aqueous emulsion, 2 parts of dispersing agent, 1 part of defoaming agent, 1 part of thickening agent, 0.5 part of mildew inhibitor, 0.5 part of pH regulator and 151 parts of water.
Example 11
Specific embodiment the same as in example 1, and different from example 1, the thickener used in the preparation of aerogel heat insulation finishing agent in this example is polyurethane thickener SN-THICKENER 621N, purchased from tin-free Handersen chemical products Co.
Comparative example 1
Specific embodiment the present comparative example was conducted by using, as the modified macroporous titanium dioxide in example 1, macroporous silica microspheres having an average particle diameter of 5 μm and an average pore diameter of 1 μm in place of the modified macroporous titanium dioxide in example 1, and the preparation method of the macroporous silica microspheres was as follows:
(1) Adding 20 parts of tetrabutyl orthosilicate into 140 parts of absolute ethyl alcohol, stirring, slowly dropwise adding 8 parts of glacial acetic acid, and dropwise adding for 15 min;
(2) Stirring for 12h, adding 0.6 part of PMMA microspheres, aging at 40 ℃ for 24h, cooling to room temperature, and drying;
(3) Placing the mixture in a muffle furnace for roasting for 2 hours at 300 ℃ and for roasting for 3 hours at 500 ℃ to obtain the macroporous silica microspheres with the average particle size of 5 mu m and the average pore size of 1 mu m.
Performance testing
The fabrics of each example and comparative example were tested for performance and the results are reported in table 1.
(1) Waterproof property
The water repellency was tested with reference to AATCC 127.
(2) Anti-ultraviolet properties
The anti-ultraviolet performance test is described in GB/T18830-2009.
(3) Thermal insulation performance
And (3) heat insulation and cooling performance, placing the tent fabric on a self-made heating table with the temperature set to 40 ℃ for 1 hour, and then testing the surface temperature of the tent fabric.
The test sample is paved on a test board of the flat-plate type thermal insulation instrument, the same temperature is maintained by adopting electrothermal control, and the temperature is kept unchanged by switching on and off, so that the heat of the test board can be emitted only in the direction of the test sample. During testing, the heating time required by the test board to maintain the temperature unchanged in a certain time is measured to calculate the thermal index Crohn value of the tent fabric.
(4) Air permeability
Air permeability test reference is made to GB/T5453-1997 determination of air permeability of textile fabrics.
(5) Moisture permeability
Air permeability test reference GB/T12704.1-2009 textile fabric moisture permeability test method part 1: and (5) a wet sucking method.
TABLE 1
As can be seen from Table 1, the tent fabrics prepared in examples 1-13 have good waterproof performance, can be normally used in rainy days, and are convenient for people to go out to play; the above test results also show that the water repellency of examples 1-13 can reach 3000mmH 2 O; at the same time, examples 1 to 13 also all exhibited excellent properties in terms of the anti-ultraviolet function, UPF is 20++, can shield ultraviolet rays for people, and is also suitable for outdoor activities under burning sun.
From a comparison of example 1 and example 4, it can be seen that the mass ratio of aerogel powder to modified macroporous titanium dioxide microspheres in the shell fabric intermediate aerogel heat insulation finishing agent is 1.75:1, the titanium dioxide content of the fabric prepared in the example 4 is improved, and although the ultraviolet resistance and the air and moisture permeability are good, the reduction of the aerogel content leads to poor waterproof, heat insulation and heat preservation effects and lower Kroll value results; from a comparison of example 1 and example 5, it can be seen that the mass ratio of aerogel powder to modified macroporous titanium dioxide microspheres in the shell fabric intermediate aerogel heat insulation finishing agent is 3.58: in the case of 1, the aerogel content is too much, the fabric prepared in the example 5 has better heat insulation and warmth retention effects and higher Kroll value results, but the ultraviolet resistance is obviously reduced due to the reduction of the content of the titanium dioxide, and the water resistance is improved due to the hydrophobic effect of the aerogel, but the air permeability and the moisture permeability are reduced due to the reduction of the content of the macroporous titanium dioxide, so that the effect of unidirectional moisture guiding is further proved, and the air permeability and the moisture permeability are improved. The analysis of the embodiment shows that the heat insulation performance of the fabric is endowed by a large amount of aerogel particles; meanwhile, the mass ratio of the aerogel powder to the modified macroporous titanium dioxide is controlled within a certain range, so that better air permeability, moisture permeability, ultraviolet resistance and heat insulation performance can be obtained at the same time.
By comparing the examples 1, 6 and 7, it can be found that the quality ratio of acrylic emulsion to polyurethane emulsion in the aerogel heat insulation finishing agent of the middle layer of the fabric is changed, and the waterproof property, the anti-ultraviolet capability and the heat insulation capability of the fabric all show a trend of decreasing. In addition, polyurethane is easy to form a compact film, so that the heat insulation effect of the fabric is affected, and under the combined action of a specific amount of the polyurethane and the silicon dioxide aerogel and titanium dioxide are uniformly dispersed in an extended macromolecular chain, so that the heat insulation effect of the fabric is improved.
It can be found from comparative examples 1 and 8 that the substitution of macroporous silica with mesoporous silica significantly worsens the air and moisture permeability of the fabric, and the decrease in heat insulating ability due to the lower internal porosity further proves that macroporous silica can have the functions of unidirectional moisture guiding and heat insulating improvement.
According to the method, the situation that when the addition amount of carboxymethyl cellulose in tent fabric is too large, the viscosity of slurry is too large, aerogel particles occupy the original air position, the internal air is reduced, the heat insulation effect is reduced, the dispersibility of the aerogel is insufficient if the carboxymethyl cellulose is too small, the heat insulation effect is also reduced, the coaction of the specific amount of carboxymethyl cellulose and aerogel powder is further proved, the dispersion of the aerogel is improved, the viscosity of a system is regulated, the adhesion force to the fabric and the heat insulation effect of the heat insulation layer are improved, and the leveling property of the heat insulation layer is good can be found.
Example 11 the polyurethane thickener SN-THICKENER 621N was used instead of carboxymethyl cellulose in example 1, and the waterproof property, the anti-uv ability, the heat insulation effect and the cromet value of the tent fabric were all reduced. The effect of the coaction of the specific amount of carboxymethyl cellulose and the aerogel powder is obviously better than that of the coaction of the polyurethane thickener SN-THICKENER 621N and the aerogel powder.
Comparative example 1 uses macroporous silica microspheres with the same average particle diameter and average pore diameter to replace the modified macroporous titanium dioxide in example 1, and the prepared tent fabric still has better air permeability, moisture permeability and waterproofness, but the ultraviolet resistance is reduced because the ultraviolet resistance of the silica is poor, and the heat insulation performance of comparative example 1 is poor, which indicates that the silica does not help or helps to improve the heat insulation performance of the fabric less, and the side surface reflects the reflection effect of the titanium dioxide to improve the heat insulation effect of the fabric.
In summary, according to the embodiments, the comparative examples and the table 1, the heat-insulating tent fabric provided by the invention not only effectively solves the problems that the conventional tent fabric is easy to cause stuffy heat and difficult to resist in a tent due to insolation in the morning and the temperature in the tent is lower due to sudden drop in the evening, but also integrates the functions required by a series of outdoor supplies such as ultraviolet resistance, far infrared emission, antibacterial mildew-proof self-cleaning, sound insulation, water proofing, ventilation and moisture permeability and the like, greatly improves the use comfort of people, is suitable for popularization in the chemical fiber field, and has wide development prospect.