WO2013159668A1 - 含银的抗菌性纤维、织物和伤口敷料及其制备方法 - Google Patents
含银的抗菌性纤维、织物和伤口敷料及其制备方法 Download PDFInfo
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- WO2013159668A1 WO2013159668A1 PCT/CN2013/074345 CN2013074345W WO2013159668A1 WO 2013159668 A1 WO2013159668 A1 WO 2013159668A1 CN 2013074345 W CN2013074345 W CN 2013074345W WO 2013159668 A1 WO2013159668 A1 WO 2013159668A1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
- A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
- A61L15/22—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons containing macromolecular materials
- A61L15/28—Polysaccharides or their derivatives
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/00051—Accessories for dressings
- A61F13/00063—Accessories for dressings comprising medicaments or additives, e.g. odor control, PH control, debriding, antimicrobic
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/00987—Apparatus or processes for manufacturing non-adhesive dressings or bandages
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
- A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
- A61L15/42—Use of materials characterised by their function or physical properties
- A61L15/46—Deodorants or malodour counteractants, e.g. to inhibit the formation of ammonia or bacteria
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B5/00—Packaging individual articles in containers or receptacles, e.g. bags, sacks, boxes, cartons, cans, jars
- B65B5/04—Packaging single articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B55/00—Preserving, protecting or purifying packages or package contents in association with packaging
- B65B55/02—Sterilising, e.g. of complete packages
- B65B55/12—Sterilising contents prior to, or during, packaging
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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
- D01F9/00—Artificial filaments or the like of other substances; Manufacture thereof; Apparatus specially adapted for the manufacture of carbon filaments
-
- 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
- D01F9/00—Artificial filaments or the like of other substances; Manufacture thereof; Apparatus specially adapted for the manufacture of carbon filaments
- D01F9/04—Artificial filaments or the like of other substances; Manufacture thereof; Apparatus specially adapted for the manufacture of carbon filaments of alginates
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2300/00—Biologically active materials used in bandages, wound dressings, absorbent pads or medical devices
- A61L2300/10—Biologically active materials used in bandages, wound dressings, absorbent pads or medical devices containing or releasing inorganic materials
- A61L2300/102—Metals or metal compounds, e.g. salts such as bicarbonates, carbonates, oxides, zeolites, silicates
- A61L2300/104—Silver, e.g. silver sulfadiazine
Definitions
- the present invention relates to a method of preparing silver-containing antimicrobial fibers and wound dressings thereof, and silver-containing antimicrobial fibers prepared by the method, and fabrics and wound dressings thereof. Background technique
- Metal type antibacterial dressings are metal silver, such as metallic silver coating or nano silver, in or on the surface of the material (fiber). Metallic silver releases silver ions and kills bacteria.
- the ionic antibacterial dressing is to add a silver compound to the inside or the surface of the material. After the dressing encounters water, the silver compound releases silver ions and kills the bacteria.
- Chinese patent application CN1895683A discloses a nano silver antibacterial dressing and a preparation method thereof.
- the invention adopts a padding method to apply a coating liquid containing nano silver on a fabric to prepare a nano silver content of 0.05-2.9% by weight. dressing.
- Chinese patent CN100346840C discloses a composite nano antibacterial medical dressing which combines silver-containing nanoparticles on a nonwoven fabric or a carbon fiber adsorbent material, having a particle diameter of 1 to 15 nm.
- Chinese Patent Application No. CN1066783A discloses a method of preparing an antibacterial material containing an antibacterial metal by forming an antibacterial material containing an antibacterial metal of silver, copper or the like and an alloy thereof by a physical method such as vapor deposition.
- U.S. Patent No. 7,462,753 discloses a nanosilver wound dressing having a four-layer structure, the first layer being composed of a hydrophilic cloth, the second layer being composed of activated carbon cloth impregnated with nanosilver, and the third layer being super A nonwoven fabric composed of a water-absorbent polymer is formed, and the fourth layer is composed of a pore-like fabric covering the third layer.
- U.S. Patent No. 7,385,101 discloses an antibacterial textile material suitable for use in a wound dressing and a wound dressing thereof which is obtained by mixing a textile fiber having a metallic silver coating on the surface with alginate fibers by a nonwoven method. .
- European Patent EP 1 095 179 discloses a process for the preparation of a nonwoven fabric for wound dressing which utilizes a lamination process to composite alginate webs on both sides of a silver coated fiber mesh.
- Chinese patent application CN1673425A describes a process for preparing an antimicrobial viscose fiber containing 0.1-1% by weight of nanosilver, wherein the nanosilver metal is added to the spinning dope.
- the above patents mainly incorporate metal silver particles into the fiber structure.
- the mechanism of action of the metallic antibacterial dressing is that the dressing releases a small amount of silver ions when it encounters water, so a large proportion of silver is required to achieve the desired antibacterial effect.
- U.S. Patent No. 6,897,349 and European Patent No. 1,216,065 disclose the preparation of a silver-containing antibacterial material by dispersing silver chloride in the fibers during the preparation of the fibers.
- a silver-containing medical dressing is prepared by blending a silver-containing fiber with a non-silver-containing fiber, and the resulting wound dressing contains 0.01 to 5.0% by weight of silver ions, as disclosed in US Patent No. US20030180346 and European Patent Application No. 1,319,842.
- Chinese Patent No. CN1308509C discloses a silver-containing chitosan fiber having an antibacterial action and a preparation method thereof, which comprises mixing a silver compound particle having a particle diameter of 1 ⁇ m or less, that is, sodium zirconium hydrogen phosphate (trade name: Alphasan), in spinning. In the solution, the silver compound contains silver in an amount of from 3.0 to 4.0% by weight.
- a method of adding a silver compound (silver carbonate) to the inside of a fiber by blending a silver compound in a fiber spinning solution is described in the European Patent No. EP 1 849 464 and the US Patent No. 2007 275 043.
- Ionic antibacterial dressings have a high efficiency in the use of silver, and most of the silver-containing antibacterial dressings on the market are ionic.
- most of the silver compounds used in ionic silver-containing dressings are very low in water solubility, such as silver chloride, silver carbonate, etc., because of their low solubility in water, only a small amount of silver ions are ionized after water to reach a dissolution equilibrium. When these small amounts of silver ions are consumed, the insoluble silver compound re-ionizes a small amount of silver ions, and the effect of sustained release of silver ions is achieved by such a dissolution balance.
- the use of a low-water-soluble ionic silver-containing dressing can release silver ions continuously, but it releases less silver ions after exposure to water, so relatively more silver compounds are still needed to achieve the desired antibacterial effect.
- the present invention utilizes the principle that a carboxyl group, an amino group or the like in a fiber material is chemically bound to a silver ion, and a method of directly adding silver ions to a spinning solution of solution spinning (in which silver ions are preferred)
- Silver nitrate which accounts for about 60% of the total silver nitrate, achieves the purpose of uniformly distributing silver ions in the fiber structure, and the utilization rate of the silver raw material is more than 70%.
- the object of the present invention is to use a silver nitrate solution mixed with a spinning solution, which can uniformly distribute silver in the fiber structure, thereby producing a highly effective antibacterial fabric and dressing. To achieve long-lasting antibacterial (effective antibacterial time up to 7 days or more).
- the object of the present invention is to use a silver nitrate solution mixed with a spinning solution, which can uniformly distribute silver in the fiber structure, thereby producing a highly effective antibacterial fabric and dressing. To achieve long-lasting antibacterial (effective antibacterial time up to 7 days or more).
- One of the objects of the present invention is to provide a silver-containing fiber wound dressing prepared by wet spinning, characterized in that the silver-containing fiber is directly stirred in a high-polymer spinning solution by silver nitrate, followed by wet spinning.
- the ratio of the silver ions to the high polymer is 0.01 to 10% by weight, preferably 0.1 to 7% by weight, more preferably 0.5 to 5% by weight, based on the effective silver content.
- the high polymer is a chitosan fiber or an alginate fiber.
- the alginate fiber is a high mannuronic acid type or a high guluronic acid type or a mannuronic acid/guluronic acid mixed type fiber, and the alginate fiber is a calcium alginate fiber or a seaweed Calcium/sodium fiber.
- the chitosan fiber is a silver-containing chitosan fiber having a degree of deacetylation of 80% or more, and the chitosan fiber is chemically modified by carboxymethylation or acylation to improve absorption performance thereof,
- the modified fiber is, for example, a silver-containing carboxymethylated chitosan fiber and a silver-containing chitosan fiber.
- the silver-containing fiber has a certain linear density and curl, and its linear density It is l-5dtex and the fiber length is 5-125mm.
- the wound dressing of the present invention can be prepared by a fabric obtained by a needle punching nonwoven process or a chemical bonding nonwoven process or a weaving process or a knitting process. If the needle-punched nonwoven process is used, the fiber length can be longer, 30-100 mm ; if the chemical bonding nonwoven process is used, the fiber length can be shorter, 3-15 mm; if using a weaving or knitting process, The fiber length can be 20-85 mm.
- the absorption amount of the solution A is 1200% or more
- the longitudinal wet strength (MD) is not less than 0.3 N/cm
- the transverse wet strength (CD) is not less than 0.4 N. /cm.
- Another object of the present invention is to provide a method of preparing a silver fiber wound dressing comprising the steps of:
- the ratio of silver ions to high polymer is 0.01-10% by weight, preferably 0.1-0.7 % by weight, more preferably 0.5 to 5% by weight;
- step a) and step b) of the above method sodium hypochlorite is added to the silver nitrate solution, and sodium hypochlorite accounts for 0.005% to 2% of the polymer; or chlorine is added to the silver nitrate solution.
- Sodium hydride, sodium chloride accounts for 0.001% to 11.0% of polymer, so that silver ions can be uniformly dispersed inside and on the surface of the fiber.
- the present invention also provides a method of preparing a silver fiber-containing wound dressing comprising the steps of: a) dissolving silver nitrate in water;
- the present invention also provides a method of preparing a silver fiber-containing wound dressing comprising the steps of: a) dissolving silver nitrate in water;
- the resulting fabric was cut, sterilized, and packaged to obtain the dressing. Since the silver nitrate solution used in the present invention is added to the spinning polymer solution before the spinning process, it is ensured that the silver ions can be uniformly distributed in the obtained fiber structure.
- silver ions are first released from the outer surface of the dressing fiber, and the silver ions in the fiber structure can be wounded in the wound as the internal structure of the fiber is wetted. During the process, it is slowly released and maintains an effective silver ion concentration for a long time.
- the present invention also provides a method for preparing a solution-type antibacterial fiber containing silver ions, in particular, a part of the spinning polymer is first dissolved in a stirring vessel, and the amount of the pre-dissolved polymer is required to make the container
- the viscosity of the solution reaches between 200 and 1000 centipoise, and the silver ion solution is added to the stirring vessel under continuous stirring, and a part of the spinning polymer is dissolved in the stirring vessel under continuous stirring.
- the pre-dissolved polymer is used in an amount such that the viscosity of the solution in the vessel reaches 500-1000 centipoise, stirred for 20-90 minutes, and finally the remaining spun polymer is added, followed by defoaming and spinning.
- the wound dressing of the present invention is composed of a fabric composed of fibers having silver ions distributed inside and on the surface, the silver ions are uniformly distributed throughout the cross section of the fibers. Accordingly, the present invention also relates to the use of the silver-containing fibrous wound dressing for the preparation of a medicament for use in wounds and surgical hemostasis.
- the fiber wound dressing has the ability to continuously release a sufficient amount of silver ions, is particularly suitable for chronic wound treatment, and can provide long-term and effective antibacterial function, and can effectively prevent various bacteria or other microorganisms from being wounded. Infection. DRAWINGS
- Figure 1 shows the zone of inhibition for a dressing containing 0.5% by weight of silver ions after 1 day in a S. aureus culture dish.
- Figure 2 shows the zone of inhibition of the dressing containing 0.5% by weight of silver ions after 5 days in a S. aureus culture dish.
- Figure 3 shows the zone of inhibition of the dressing containing 0.5% by weight of silver ions after 7 days in a S. aureus culture dish.
- Figure 4 shows the zone of inhibition of a dressing containing 1% by weight of silver ions in an E. coli dish for 1 day.
- Figure 5 shows the zone of inhibition of the dressing containing 1% by weight of silver ions in E. coli dishes for 5 days.
- Figure 6 shows the zone of inhibition of the dressing containing 1% by weight of silver ions in E. coli dishes after 7 days.
- Figure 7 shows the inhibition zone after 1 day in a B. subtilis culture dish containing a 10% by weight silver ion dressing.
- Figure 8 shows the inhibitory zone of the dressing containing 10% by weight of silver ions in the B. subtilis culture dish.
- Figure 9 shows the zone of inhibition of the dressing containing 0.05% by weight of silver ions after 1 day in a S. aureus culture dish.
- Figure 10 shows the zone of inhibition of the dressing containing 0.05% by weight of silver ions after 7 days in a S. aureus culture dish.
- Figure 11 shows the zone of inhibition of a dressing containing 0.01% by weight of silver ions after 1 day in a S. aureus culture dish.
- Figure 12 shows the zone of inhibition of the dressing containing 0.01% by weight of silver ions in the S. aureus culture dish after 7 days.
- Figure 13 is a graph showing the trend of silver release in the 10 ml wound simulant of the dressing of Example 1. detailed description
- sodium alginate powder has a dry weight of 6 kg and a water content of 11%.
- the wet weight of sodium alginate powder is
- the stirring vessel was taken out from the agitator, and the agitated mixture was allowed to stand in a stirring vessel for about 24 hours to carry out natural defoaming. At this time, silver ions are uniformly distributed in the sodium alginate solution;
- the obtained spinning dope can be prepared according to the general calcium alginate fiber extrusion process, that is, the sodium alginate is converted into calcium alginate through a spinning bath. Drafting bath and traction roller are used to stretch molecular chains, clean, dry, oil, curl and cut;
- the spun fibers are grayish white and have a silver content of about 0.5% by weight;
- Example 3 shows the zone of inhibition of the dressing containing 0.5% by weight of silver ions in the S. aureus culture dish after 7 days. It can be seen that the dressing containing 0.5% by weight of silver ions still has good antibacterial properties after 7 days.
- Example 3 shows the zone of inhibition of the dressing containing 0.5% by weight of silver ions in the S. aureus culture dish after 7 days. It can be seen that the dressing containing 0.5% by weight of silver ions still has good antibacterial properties after 7 days.
- the obtained spinning dope can be converted into alginate by the ordinary calcium alginate fiber extrusion process, that is, through the spinning bath. Bath and traction rolls are stretched to align molecular chains, clean, dry, oil, curl and cut;
- the spun fiber is grayish white and has a silver content of about 1% by weight
- Example 5 shows the inhibition zone of a dressing containing 1% by weight of silver ions in an E. coli dish for 1 day
- Figure 5 shows a dressing containing 1% by weight of silver ions in E. coli.
- Figure 6 shows the zone of inhibition of the dressing containing 1% by weight of silver ions in E. coli dishes for 7 days. It can be seen that the silver-containing dressing containing 1% by weight still has good antibacterial properties after 7 days.
- Example 5 shows the inhibition zone of a dressing containing 1% by weight of silver ions in an E. coli dish for 1 day
- Figure 5 shows a dressing containing 1% by weight of silver ions in E. coli.
- Figure 6 shows the zone of inhibition of the dressing containing 1% by weight of silver ions in E. coli dishes for 7 days. It can be seen that the silver-containing dressing containing 1% by weight still has good antibacterial properties after 7 days.
- Example 5 shows the inhibition zone
- the obtained spinning dope can be converted into alginate by the ordinary calcium alginate fiber extrusion process, that is, through the spinning bath. Bath and traction rolls are stretched to align molecular chains, clean, dry, oil, curl and cut;
- the spun fibers are grayish white and have a silver content of about 10% by weight;
- Example 7 shows the inhibition zone of a dressing containing 10% by weight of silver ions in a Bacillus subtilis culture dish after 1 day
- Figure 8 shows the antibacterial activity of a dressing containing 10% by weight of silver ions in a Bacillus subtilis culture dish. ring. It can be seen that the 10% by weight silver-containing dressing still has good antibacterial properties after the day.
- the obtained spinning dope can be converted into alginate by the ordinary calcium alginate fiber extrusion process, that is, through the spinning bath. Bath and traction rolls are stretched to align molecular chains, clean, dry, oil, curl and cut;
- the spun fibers are grayish white and have a silver content of about 0.05% by weight;
- Example 9 shows the zone of inhibition of a dressing containing 0.05% by weight of silver ions in a Staphylococcus aureus culture dish after 1 day, and Figure 10 shows a dressing containing 0.05% by weight of silver ions in a Staphylococcus aureus culture dish after 7 days. Inhibition zone. It can be seen that the silver-containing dressing containing 0.05% by weight still has good antibacterial properties after 7 days.
- Example 9 shows the zone of inhibition of a dressing containing 0.05% by weight of silver ions in a Staphylococcus aureus culture dish after 1 day
- Figure 10 shows a dressing containing 0.05% by weight of silver ions in a Staphylococcus aureus culture dish after 7 days. Inhibition zone. It can be seen that the silver-containing dressing containing 0.05% by weight still has good antibacterial properties after 7 days.
- Example 9 shows the zone of inhibition of a dressing containing 0.05% by weight of silver ions in a Staphylococcus aureus
- the stirrer is taken out and allowed to stand in the stirring vessel for about 24 hours for natural defoaming. At this time, the silver ions are uniformly distributed in the sodium alginate solution; 6.
- the obtained spinning dope can be converted into alginate by the ordinary calcium alginate fiber extrusion process, that is, through the spinning bath. Bath and traction rolls are stretched to align molecular chains, clean, dry, oil, curl and cut;
- the spun fiber is grayish white and has a silver content of about 0.01% by weight
- Example 11 shows the zone of inhibition of the dressing containing 0.01% by weight of silver ions in the S. aureus culture dish after 1 day
- Figure 12 shows the dressing containing 0.01% by weight of silver ions in the S. aureus culture dish after 7 days. Inhibition zone. It can be seen that 0.01% by weight of the silver-containing dressing still has good antibacterial properties after 7 days.
- the chitin raw material has a moisture content of 10% by weight
- the spinning dope requires a solid content of 5% by weight
- 200 g of the chitin raw material powder requires 3420 ml of a 2% by weight aqueous acetic acid solution.
- the dry weight of the chitin raw material powder is 180 g;
- the obtained spinning dope can be formed into a tow by a general chitin fiber extrusion process, that is, a spinning bath of 5 wt% sodium hydroxide.
- the bath and traction rolls are stretched to rearrange, clean, dry, oil, curl and cut the molecular chains;
- the spun fiber is light yellow, and the silver content is about 1.1% by weight;
- the stirrer is taken out and allowed to stand in the stirring vessel for about 24 hours for natural defoaming. At this time, the silver chloride particles are evenly distributed in the sodium alginate solution; 5.
- the obtained spinning dope can be extruded according to the general calcium alginate fiber, that is, Sodium alginate is converted into calcium alginate through a spinning bath, molecular chains are drawn through a drawing bath and a pulling roll, washed, dried, oiled, crimped and cut;
- the spun fibers are grayish white and have a silver content of about 0.05% by weight;
- the obtained spinning dope can be converted into alginate by the ordinary calcium alginate fiber extrusion process, that is, through the spinning bath. Bath and pull The draw rolls are arranged to align the molecular chains, clean, dry, oil, curl and cut;
- the spun fibers are grayish white and have a silver content of about 0.05% by weight;
- the stirrer is taken out and allowed to stand in the stirring vessel for about 24 hours for natural defoaming. At this time, the silver chloride particles are uniformly distributed in the sodium alginate solution;
- the obtained spinning dope can be converted into alginate by the ordinary calcium alginate fiber extrusion process, that is, through the spinning bath. Bath and traction rolls are stretched to align molecular chains, clean, dry, oil, curl and cut;
- the spun fiber is grayish white and has a silver content of about 1% by weight
- Example 15 A silver-containing dressing containing 1% by weight is obtained.
- the obtained spinning dope can be converted into alginate by the ordinary calcium alginate fiber extrusion process, that is, through the spinning bath. Bath and traction rolls are stretched to align molecular chains, clean, dry, oil, curl and cut;
- the spun fiber is grayish white and has a silver content of about 1% by weight
- the stirrer is taken out and allowed to stand in the stirring vessel for about 24 hours for natural defoaming. At this time, the silver chloride particles are uniformly distributed in the sodium alginate solution;
- the obtained spinning dope can be converted into alginate by the ordinary calcium alginate fiber extrusion process, that is, through the spinning bath. Bath and traction rolls are stretched to align molecular chains, clean, dry, oil, curl and cut;
- the spun fiber is grayish white and has a silver content of about 1% by weight
- the obtained spinning dope can be converted into alginate by the ordinary calcium alginate fiber extrusion process, that is, through the spinning bath. Bath and traction rolls are stretched to align molecular chains, clean, dry, oil, curl and cut;
- the spun fiber is grayish white and has a silver content of about 1% by weight
- Example 1 In order to observe the release of silver ions dressing properties, the embodiment of Example 1 after the silver-containing dressing was cut into 2.5 C mx2.5cm, simulated wound fluid into 10ml, 37 ° C water bath, 60-80rpm continuous oscillation seven days, and in Samples were taken at 24 hours, 72 hours, and 168 hours, and the amount of silver released in the 10 ml wound simulant was tested.
- Table 1 shows the amount of silver released from the dressing in 10 ml of wound simulating solution. It can be seen that the amount of silver released from the dressing in 7 days is increasing, and the release of silver in the dressing reaches 38.4 ppm in 168 hours (ie, 7 days).
- Table 1 Silver release time (hours) of dressing in 10ml wound simulant Silver release (ppm)
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Description
含银的抗菌性纤维、 织物和伤口敷料及其制备方法 技术领域
本发明涉及一种制备含银的抗菌性纤维及其伤口敷料的方法, 以及通过所述 方法制备的含银的抗菌性纤维及其织物和伤口敷料。 背景技术
目前, 最常见的抗菌性含银敷料分为金属型和离子型, 金属型抗菌敷料是在 材料 (纤维) 中或表面加入金属银, 如金属银涂层或纳米银, 在遇到水后, 金属 银释放出银离子并杀灭细菌。 而离子型抗菌敷料是将银化合物加到材料内部或表 面, 在敷料遇到水后, 银化合物释放出银离子并杀灭细菌。
中国专利申请 CN1895683A公开了一种纳米银抗菌敷料及其制备方法, 该发 明采用浸轧方法使含有纳米银的涂覆液涂覆于织物上, 制备成纳米银的含量为 0.05-2.9重量%的敷料。
中国专利 CN100346840C公开了一种复合纳米抗菌医用敷料, 该发明在无纺 布或碳纤维吸附材料上复合含银的纳米颗粒, 粒径为 1-15纳米。
中国专利申请 CN1066783A 公开了一种制备含有抗菌金属的抗菌材料的方 法, 该方法是通过气相沉积等物理方法形成含有银、 铜等及其合金的抗菌金属的 抗菌材料。
美国专利 US7,462,753公开了一种纳米银伤口敷料, 该敷料为四层结构, 第 一层由亲水性布构成, 第二层由浸渍了纳米银的活性碳布构成, 第三层由超级吸 水聚合物构成的无纺布形成, 第四层由覆盖于第三层的气孔状织物构成。
美国专利 US7,385,101公开了一种适用于伤口敷料的抗菌纺织材料及其伤口 敷料, 该抗菌敷料是将表面带有金属银涂层的纺织纤维与海藻酸盐纤维混合, 通 过非织造方法制得。
欧洲专利 EP1095179公开了一种用于伤口敷料的无纺织物的制备方法, 该方 法采用层压复合工艺将海藻酸盐纤维网复合在涂有银的纤维网格布的两面。
中国专利申请 CN1673425A介绍了一种制备含 0.1-1重量%纳米银的抗菌粘 胶纤维的方法, 其中纳米银金属是加在纺丝原液中的。 上述专利主要是将金属银 粒子加入纤维结构。 金属型抗菌敷料的作用机理是敷料遇到水后释放出少量银离 子, 因此需要较大比例的银才能实现所需的抗菌效果。
美国专利 US6,897,349和欧洲专利 EP1216065公开了制备含银抗菌材料的方 法, 该方法通过在制备纤维过程中, 使氯化银分散于纤维之中。
美国专利 US20030180346和欧洲专利申请 EP1318842公开了一种含银医用敷 料, 该敷料通过含银纤维与非含银纤维混纺而制得, 所得伤口敷料含有 0.01-5.0 重量%的银离子。
中国专利 CN1308509C公开了一种具有抗菌作用的含银甲壳胺纤维及其制备 方法, 该方法将粒径为 1 微米以下的银化合物颗粒即银磷酸锆氢钠 (商品名为 Alphasan) 混合于纺丝溶液中, 该银化合物含银量为 3.0-4.0重量%。
欧洲专利 EP1849464和美国专利 US2007275043介绍了一种把银化合物 (银 碳酸盐) 加入到纤维内部的方法, 即把银化合物掺混在纤维纺丝液中。
离子型抗菌敷料对银的使用效率较高, 市场上主要含银抗菌敷料大都是离子 型的。但是目前离子型含银敷料使用的银化合物大都是水溶性很低的,如氯化银、 碳酸银等, 由于它们在水中的溶解度低, 遇水后仅电离出少量的银离子便达到溶 解平衡, 当这些少量的银离子被消耗完后, 不溶的银化合物才重新电离出少量的 银离子, 通过这样的溶解平衡达到持续释放银离子的效果。 使用水溶性低的离子 型含银敷料虽然可以持续地释放银离子, 但其遇水后银离子释放量较少, 因此仍 然需要相对较多的银化合物才能实现需要的抗菌效果。
为了解决上述存在的问题, 本发明利用纤维材料中的羧基、 氨基等对银离子 产生化学束缚作用的原理, 采用把银离子直接加入到溶液纺丝的纺丝原液中的方 法 (其中银离子优选硝酸银, 其银含量占硝酸银总量的 60%左右), 实现了把银 离子均匀分布于纤维结构中的目的, 并且其中银原料的利用率达到 70%以上。
不同于使用颗粒状含银化合物制得的敷料, 本发明的目的是采用硝酸银溶液 与纺丝液混合的方式, 其能将银均匀地分布在纤维结构中, 从而制得高效抗菌织 物及敷料, 以实现长效抗菌 (有效抗菌时间最长可达 7天以上)。
因此, 本发明的目的是能够有效地使含量较高的硝酸银溶液均匀地分布于纤 维结构中, 从而得到含有高浓度银离子的抗菌性纤维、 织物以及伤口敷料。 发明内容
不同于使用颗粒状含银化合物制得的敷料, 本发明的目的是采用硝酸银溶液 与纺丝液混合的方式, 其能将银均匀地分布在纤维结构中, 从而制得高效抗菌织 物及敷料, 以实现长效抗菌 (有效抗菌时间最长可达 7天以上)。
本发明的目的之一是提供一种经湿法纺丝制备的含银纤维伤口敷料, 其特征 在于含银纤维是将硝酸银直接搅拌在高聚物纺丝液中, 随后经湿法纺丝制备的, 按有效含银量计算, 所述银离子占高聚物的比例为 0.01-10重量%, 优选 0.1-7重 量%, 更优选 0.5-5重量%。
其中, 所述高聚物是壳聚糖纤维或海藻酸盐纤维。 所述海藻酸盐纤维为高甘 露糖醛酸型或者高古洛糖醛酸型或者甘露糖醛酸 /古洛糖醛酸混合型纤维,并且所 述海藻酸盐纤维为海藻酸钙纤维或者海藻酸钙 /钠纤维。所述壳聚糖纤维是脱乙酰 度在 80%以上的含银壳聚糖纤维, 并且所述壳聚糖纤维通过羧甲基化或酰化进行 化学改性, 以提高其吸收性能, 所述改性纤维例如含银羧甲基化壳聚糖纤维和含 银酰化壳聚糖纤维。 此外, 所述含银纤维具有一定的线密度和卷曲度, 其线密度
为 l-5dtex, 纤维长度为 5-125mm。
本发明所涉及的伤口敷料可以通过采用针刺非织造工艺或者化学粘合非织造 工艺或者机织工艺或者针织工艺所制得的织物来制备。 如果采用针刺非织造工艺 时, 纤维长度可以长些, 为 30-100mm; 如果采用化学粘合非织造工艺时, 纤维 长度可以短些, 为 3-15mm; 如果采用机织或针织工艺时, 纤维长度可以为 20-85mm。当所述伤口敷料是一种针刺非织造布时,其对 A溶液的吸收量为 1200% 以上, 纵向湿强度 (MD) 不小于 0.3N/cm, 横向湿强度 (CD) 不小于 0.4 N/cm。
本发明的另一个目的是提供一种制备含银纤维伤口敷料的方法, 其包括下列 步骤:
a) 将硝酸银溶解在水中;
b)将高聚物(如海藻酸钠、壳聚糖)加入到所得硝酸银溶液中并搅拌成纺丝 液, 银离子占高聚物的比例为 0.01-10重量%, 优选为 0.1-0.7重量%, 更优选为 0.5-5重量%;
c) 将所得纺丝液通过溶液纺丝工艺制备成含银的抗菌性纤维;
d) 将所得纤维通过非织造、 机织或针织工艺或者化学粘合工艺加工成织物; e) 将所得织物切割, 并灭菌、 包装, 得到所述的敷料。
优选地, 在上述方法的步骤 a)和步骤 b)之间, 向所述硝酸银溶液中加入次 氯酸钠, 次氯酸钠占高聚物比例为 0.005%-2%; 或者向所述硝酸银溶液中加入氯 化钠, 氯化钠占高聚物比例为 0.001%-11.0%, 以便银离子可以均匀分散于纤维内 部和表面。
因此, 本发明还提供一种制备含银纤维伤口敷料的方法, 其包括下列步骤: a) 将硝酸银溶解在水中;
b)向所得硝酸银溶液中加入次氯酸钠,次氯酸钠占高聚物比例为 0.005%-2%; c)将高聚物加入到所得硝酸银溶液中并搅拌成纺丝液,银离子占高聚物的比 例为 0.01-10重量%;
d) 将所得纺丝液通过溶液纺丝工艺制备成含银的抗菌性纤维;
e) 将所得纤维通过非织造、 机织或针织工艺或者化学粘合工艺加工成织物; 0 将所得织物切割, 并灭菌、 包装, 得到所述的敷料。
本发明还提供一种制备含银纤维伤口敷料的方法, 其包括下列步骤: a) 将硝酸银溶解在水中;
b) 向所得硝酸银溶液中加入氯化钠, 氯化钠占高聚物比例为 0.001%-11.0%; c)将高聚物加入到所得硝酸银溶液中并搅拌成纺丝液,银离子占高聚物的比 例为 0.01-10重量%;
d) 将所得纺丝液通过溶液纺丝工艺制备成含银的抗菌性纤维;
e) 将所得纤维通过非织造、 机织或针织工艺或者化学粘合工艺加工成织物;
0 将所得织物切割, 并灭菌、 包装, 得到所述的敷料。
由于在纺丝工序之前, 本发明所使用的硝酸银溶液就被加入到纺丝聚合物溶 液中, 这就确保了银离子能够均匀地分布于制得的纤维结构内。 当制得的含有银 离子的抗菌性伤口敷料接触到伤口渗出液时, 首先从敷料纤维外表面释放出银离 子, 随着纤维内部结构被沾湿, 纤维结构内的银离子能够在伤口护理过程中, 被 缓慢地释放出来并长期保持有效的银离子浓度。
此外, 本发明还提供一种制备含有银离子的溶液型抗菌性纤维的方法, 具体 是先将一部分纺丝高聚物加入搅拌容器中溶解, 所述预先溶解的高聚物的用量要 使容器中溶液的粘度达到 200-1000厘泊之间,再在持续搅拌的条件下将银离子溶 液加入到搅拌容器中, 再在持续搅拌的条件下将一部分纺丝高聚物加入搅拌容器 中溶解, 所述预先溶解的高聚物的用量要满足使容器中溶液的粘度达到 500-1000 厘泊, 搅拌 20-90分钟, 最后再加入剩余纺丝高聚物, 然后脱泡、 纺丝。
由于本发明涉及的伤口敷料是由结构内部和表面分布有银离子的纤维构成的 织物所构成, 所述银离子均匀地分布于纤维的整个横截面内。 因此, 本发明还涉 及所述含银纤维伤口敷料在制备用于伤口和手术止血的医药制品中的用途。 作为 伤口治疗敷料, 该纤维类伤口敷料具有持续地释放出足够量的银离子的能力, 特 别适合慢性伤口治疗, 可以提供长期而有效的抗菌功能, 能够有效地防止各种细 菌或其他微生物对伤口的感染。 附图说明
图 1显示为含有 0.5重量%银离子的敷料在金黄色葡萄球菌培养皿中 1天后 的抑菌圈。
图 2显示为含有 0.5重量%银离子的敷料在金黄色葡萄球菌培养皿中 5天后 的抑菌圈。
图 3显示为含有 0.5重量%银离子的敷料在金黄色葡萄球菌培养皿中 7天后 的抑菌圈。
图 4显示为含有 1重量%银离子的敷料在大肠杆菌培养皿中 1天后的抑菌圈。 图 5显示为含有 1重量%银离子的敷料在大肠杆菌培养皿中 5天后的抑菌圈。 图 6显示为含有 1重量%银离子的敷料在大肠杆菌培养皿中 7天后的抑菌圈。 图 7显示为含有 10重量%银离子的敷料在枯草芽孢杆菌培养皿中 1天后的抑 菌圈。
图 8显示为含有 10重量%银离子的敷料在枯草芽孢杆菌培养皿中 Ί天后的抑 菌圈。
图 9显示为含有 0.05重量%银离子的敷料在金黄色葡萄球菌培养皿中 1天后 的抑菌圈。
图 10显示为含有 0.05重量%银离子的敷料在金黄色葡萄球菌培养皿中 7天 后的抑菌圈。
图 11显示为含有 0.01重量%银离子的敷料在金黄色葡萄球菌培养皿中 1天 后的抑菌圈。
图 12显示为含有 0.01重量%银离子的敷料在金黄色葡萄球菌培养皿中 7天 后的抑菌圈。
图 13显示为实施例 1的敷料在 10ml伤口模拟液中的银释放量趋势图。 具体实施方式
下面通过附图以及具体实施例, 进一步对本发明的技术方案做出具体说明。 本发明所涉及的伤口敷料中主要成分的用量和计算方式如下:
例如, 海藻酸钠粉的干重为 6kg, 其含水率为 11%, 则海藻酸钠粉的湿重为
银离子占硝酸银的重量比为 60%。 以 0.5%的含银量为例,海藻酸钠干粉中银 的重量为 6kgx0.5%=0.03kg, 则实际所用硝酸银的重量为 0.03÷60%=0.05kg, 即 50g。 实施例 1
制备含有 0.5重量%银离子的抗菌性纤维及其伤口敷料的方法:
1. 在搅拌容器中加入 114升的水;
2. 对于含有 0.5重量%的银离子和干重 6千克的海藻酸钠的产品, 按照上述 计算方式, 需要硝酸银 50克, 海藻酸钠粉 6.74千克, 用水 114升;
3. 称量 50克硝酸银和 6.74千克海藻酸钠粉, 在装有 114升水的搅拌容器中 加入 50克硝酸银, 启动搅拌器, 使硝酸银均匀分散在溶液中。再加入 1千克海藻 酸钠粉末, 持续搅拌;
4. 在保持搅拌器进行搅拌的同时, 向搅拌容器中缓慢加入剩余的海藻酸钠粉 末;
5. 在所有海藻酸钠充分地分散后, 将搅拌容器从搅拌器中取出, 并且使搅拌 混合物在搅拌容器中静置 24小时左右, 进行自然消泡。此时, 银离子均匀地分布 在海藻酸钠溶液中;
6. 当纺丝原液中的绝大部分气泡消失后, 所得纺丝原液就可以按一般的海藻 酸钙纤维挤出工艺进行制备, 即经过纺丝浴使海藻酸钠转化成海藻酸钙、 通过牵 伸浴和牵引辊抽伸排列分子链、 清洗、 干燥、 上油、 卷曲和切断;
7. 纺出的纤维为灰白色, 且其中银含量约为 0.5重量%;
8. 使用传统的无纺工艺将纤维制备成无纺布。 将制得的布切成 10xl0cm, 并 包装到纸袋中。 得到的该敷料将通过 25-40千戈瑞的伽马辐照进行灭菌;
9. 得到含 0.5重量%银离子的敷料。 实施例 2
为了观察敷料的抗菌性能,在培养皿中均匀地涂布一定量的金黄色葡萄球菌, 然后分别将实施例 1所得的敷料切成 2x2cm放入其中,在恒温 37°C下连续培养 7 天, 每天观察平板上的细菌生长情况。 图 1显示了含 0.5重量%银离子的敷料在 金黄色葡萄球菌培养皿中 1天后的抑菌圈, 图 2显示了含 0.5重量%银离子的敷 料在金黄色葡萄球菌培养皿中 5天后的抑菌圈。 图 3显示了含 0.5重量%银离子 的敷料在金黄色葡萄球菌培养皿中 7天后的抑菌圈。 可以看出含 0.5重量%银离 子的敷料在 7天后仍然具有较好的抗菌性能。 实施例 3
制备含有 1重量%银离子的抗菌性纤维及其伤口敷料的方法:
1. 在搅拌容器中充入 114升的水;
2. 对于含有 1重量%的银离子和干重 6千克的海藻酸钠的产品, 按照上述计 算方式, 需要硝酸银 100克, 海藻酸钠粉 6.74千克, 用水 114升;
3. 称量 100克硝酸银和 6.74千克海藻酸钠粉,在装有 114升水的搅拌容器中 加入 100克硝酸银, 启动搅拌器, 使硝酸银均匀分散在溶液中。 再加入 1千克海 藻酸钠粉末, 持续搅拌;
4. 在保持搅拌器进行搅拌的同时, 向搅拌容器中缓慢加入剩余的海藻酸钠粉 末;
5. 在充分地分散所有海藻酸钠后, 取出搅拌器, 并且使之在搅拌容器保持静 置 24小时左右, 进行自然消泡。 此时, 银离子均匀地分布在海藻酸钠溶液中;
6. 当纺丝原液中的绝大部分气泡消失后,所得纺丝原液就可以按一般的海藻 酸钙纤维挤出工艺, 即经过纺丝浴使海藻酸钠转化成海藻酸钙、 通过牵伸浴和牵 引辊抽伸排列分子链、 清洗、 干燥、 上油、 卷曲和切断;
7. 纺出的纤维为灰白色, 且其中银含量约 1重量%;
8. 使用传统的无纺工艺将纤维制备成无纺布。将制得的布切成 10x10cm, 并 包装到纸袋中。 得到的该敷料将通过 25-40千戈瑞的伽马辐照进行灭菌;
9. 得到含 1重量%银离子的敷料。 实施例 4
为了观察敷料的抗菌性能, 在培养皿中均匀地涂布一定量的大肠杆菌, 然后 分别将实施例 3所得的敷料切成 2x2cm放入其中, 在恒温 37°C下连续培养 7天, 每天观察平板上的细菌生长情况。 图 4显示了含 1重量%银离子的敷料在大肠杆 菌培养皿中 1天后的抑菌圈, 图 5显示了含 1重量%银离子的敷料在大肠杆菌培
养皿中 5天后的抑菌圈, 图 6显示了含 1重量%银离子的敷料在大肠杆菌培养皿 中 7天后的抑菌圈。 可以看出含 1重量%的含银敷料在 7天后仍然具有较好的抗 菌性能。 实施例 5
制备含有 10重量%银离子的抗菌性纤维及其伤口敷料的方法:
1. 在搅拌容器中充入 114升的水;
2. 对于含有 10重量%的银离子和干重 6千克的海藻酸钠的产品,按照上述计 算方式, 需要硝酸银 1000克, 海藻酸钠粉 6.74千克, 用水 114升;
3. 称量 1000克硝酸银和 6.74千克海藻酸钠粉, 在装有 114升水的搅拌容器 中加入 1000克硝酸银, 启动搅拌器, 使硝酸银均匀分散在溶液中。再加入 2千克 海藻酸钠粉末, 持续搅拌;
4. 在保持搅拌器进行搅拌的同时, 向搅拌容器中缓慢加入剩余的海藻酸钠粉 末;
5. 在充分地分散所有海藻酸钠后, 取出搅拌器, 并且使之在搅拌容器保持静 置 24小时左右, 进行自然消泡。 此时, 银离子均匀地分布在海藻酸钠溶液中;
6. 当纺丝原液中的绝大部分气泡消失后,所得纺丝原液就可以按一般的海藻 酸钙纤维挤出工艺, 即经过纺丝浴使海藻酸钠转化成海藻酸钙、 通过牵伸浴和牵 引辊抽伸排列分子链、 清洗、 干燥、 上油、 卷曲和切断;
7. 纺出的纤维为灰白色, 且其中银含量约 10重量%;
8. 使用传统的无纺工艺将纤维制备成无纺布。将制得的布切成 10x10cm, 并 包装到纸袋中。 得到的该敷料将通过 25-40千戈瑞的伽马辐照进行灭菌;
9. 得到含 10重量%银离子的敷料。 实施例 6
为了观察敷料的抗菌性能, 在培养皿中均匀地涂布一定量的枯草芽孢杆菌, 然后分别将实施例 5所得的敷料切成 2x2cm放入其中,在恒温 37°C下连续培养 7 天, 每天观察平板上的细菌生长情况。 图 7显示了含 10重量%银离子的敷料在枯 草芽孢杆菌培养皿中 1天后的抑菌圈,图 8显示了含 10重量%银离子的敷料在枯 草芽孢杆菌培养皿中 Ί天后的抑菌圈。可以看出含 10重量%的含银敷料在 Ί天后 仍然具有较好的抗菌性能。 实施例 7
制备含有 0.05重量%银离子的抗菌性纤维及其伤口敷料的方法:
1. 在搅拌容器中充入 114升的水;
2. 对于含有 0.05重量%的银离子和干重 6千克的海藻酸钠的产品,按照上述
计算方式, 需要硝酸银 5克, 海藻酸钠粉 6.74千克, 用水 114升;
3. 称量 5克硝酸银和 6.74千克海藻酸钠粉,在装有 114升水的搅拌容器中加 入 5克硝酸银, 启动搅拌器, 使硝酸银均匀分散在溶液中。 再加入 1千克海藻酸 钠粉末, 持续搅拌;
4. 在保持搅拌器进行搅拌的同时, 向搅拌容器中缓慢加入剩余的海藻酸钠粉 末;
5. 在充分地分散所有海藻酸钠后, 取出搅拌器, 并且使之在搅拌容器保持静 置 24小时左右, 进行自然消泡。 此时, 银离子均匀地分布在海藻酸钠溶液中;
6. 当纺丝原液中的绝大部分气泡消失后,所得纺丝原液就可以按一般的海藻 酸钙纤维挤出工艺, 即经过纺丝浴使海藻酸钠转化成海藻酸钙、 通过牵伸浴和牵 引辊抽伸排列分子链、 清洗、 干燥、 上油、 卷曲和切断;
7. 纺出的纤维为灰白色, 且其中银含量约 0.05重量%;
8. 使用传统的无纺工艺将纤维制备成无纺布。将制得的布切成 10x10cm, 并 包装到纸袋中。 得到的该敷料将通过 25-40千戈瑞的伽马辐照进行灭菌;
9. 得到含 0.05重量%银离子的敷料。 实施例 8
为了观察敷料的抗菌性能,在培养皿中均匀地涂布一定量的金黄色葡萄球菌, 然后分别将实施例 7所得的敷料切成 2x2cm放入其中,在恒温 37°C下连续培养 7 天, 每天观察平板上的细菌生长情况。 图 9显示了含 0.05重量%银离子的敷料在 金黄色葡萄球菌培养皿中 1天后的抑菌圈, 图 10显示了含 0.05重量%银离子的 敷料在金黄色葡萄球菌培养皿中 7天后的抑菌圈。 可以看出含 0.05重量%的含银 敷料在 7天后仍然具有较好的抗菌性能。 实施例 9
制备含有 0.01重量%银离子的抗菌性纤维及其伤口敷料的方法:
1. 在搅拌容器中充入 114升的水;
2. 对于含有 0.01重量%的银离子和干重 6千克的海藻酸钠的产品,按照上述 计算方式, 需要硝酸银 1克, 海藻酸钠粉 6.74千克, 用水 114升;
3. 称量 1克硝酸银和 6.74千克海藻酸钠粉,在装有 114升水的搅拌容器中加 入 1克硝酸银, 启动搅拌器, 使硝酸银均匀分散在溶液中。 再加入 1千克海藻酸 钠粉末, 持续搅拌;
4. 在保持搅拌器进行搅拌的同时, 向搅拌容器中缓慢加入剩余的海藻酸钠粉 末;
5. 在充分地分散所有海藻酸钠后, 取出搅拌器, 并且使之在搅拌容器保持静 置 24小时左右, 进行自然消泡。 此时, 银离子均匀地分布在海藻酸钠溶液中;
6. 当纺丝原液中的绝大部分气泡消失后,所得纺丝原液就可以按一般的海藻 酸钙纤维挤出工艺, 即经过纺丝浴使海藻酸钠转化成海藻酸钙、 通过牵伸浴和牵 引辊抽伸排列分子链、 清洗、 干燥、 上油、 卷曲和切断;
7. 纺出的纤维为灰白色, 且其中银含量约 0.01重量%;
8. 使用传统的无纺工艺将纤维制备成无纺布。将制得的布切成 10x10cm, 并 包装到纸袋中。 得到的该敷料将通过 25-40千戈瑞的伽马辐照进行灭菌;
9. 得到含 0.01重量%银离子的敷料。 实施例 10
为了观察敷料的抗菌性能,在培养皿中均匀地涂布一定量的金黄色葡萄球菌, 然后分别将实施例 9所得的敷料切成 2x2cm放入其中,在恒温 37°C下连续培养 7 天, 每天观察平板上的细菌生长情况。 图 11显示了含 0.01重量%银离子的敷料 在金黄色葡萄球菌培养皿中 1天后的抑菌圈, 图 12显示了含 0.01重量%银离子 的敷料在金黄色葡萄球菌培养皿中 7天后的抑菌圈。 可以看出含 0.01重量%的含 银敷料在 7天后仍然具有较好的抗菌性能。 实施例 11
制备含有 1.1重量%银离子的抗菌性甲壳素纤维及其伤口敷料的方法:
1. 根据甲壳素原料(甲壳胺粉)的含水率和所需固体含量计算出甲壳素原料 的重量。 例如, 甲壳素原料的水份为 10重量%, 纺丝原液所需的固体含量为 5重 量%, 对 200克的甲壳素原料粉末需要 3420毫升的 2重量%醋酸水溶液。 甲壳素 原料粉体的干重为 180克;
2. 计算出银离子的所需用量。对于所需的 1.1重量%的银离子含量和干重 180 克的甲壳素原料, 硝酸银约需 3.3克;
3. 将上述硝酸银粉末, 加水溶解, 同时启动搅拌器, 使银离子在搅拌容器中 均匀分散, 以得到硝酸银溶液;
4. 在装有所述醋酸水溶液的搅拌容器中, 加入 30克的甲壳素原料, 均匀后 再加入上述步骤 3中所得硝酸银溶液;
5. 在保持搅拌器进行搅拌的同时缓慢加入剩余甲壳素原料粉末;
6. 在充分地分散所有甲壳素后, 取出搅拌容器, 并且使搅拌好的液体在搅拌 容器中保持静置 24小时左右, 进行自然消泡;
7. 当纺丝原液中的绝大部分气泡消失后,所得纺丝原液就可以按一般的甲壳 素纤维挤出工艺, 即经过 5重量%氢氧化钠的纺丝浴形成丝束、 通过牵伸浴和牵 引辊抽伸使分子链重新排列、 清洗、 干燥、 上油、 卷曲和切断;
8. 纺出的纤维为浅黄色, 且其中银含量约 1.1重量%;
9. 使用传统的无纺工艺将纤维制备成无纺布。将制得的布切成 10x10cm, 并
包装到纸袋中。 得到的该敷料将通过 25-40千戈瑞的伽马辐照进行灭菌;
10. 得到含 1.1重量%银离子的敷料。 实施例 12
制备含有氯化银颗粒的抗菌性纤维及其伤口敷料的方法:
1. 在搅拌容器中充入 114升的水;
2.在装有 114升水的搅拌容器中加入 5克硝酸银, 启动搅拌器, 使硝酸银均 匀分散在溶液中, 然后按硝酸银和氯化钠 1:1的摩尔比加入 1.72克的氯化钠, 继 续搅拌, 使形成的氯化银颗粒均匀分散于体系中。 再加入 1千克海藻酸钠粉末, 持续搅拌;
3. 在保持搅拌器进行搅拌的同时,继续向搅拌容器中缓慢加入 5.74千克海藻 酸钠粉末;
4. 在充分地分散所有海藻酸钠后, 取出搅拌器, 并且使之在搅拌容器保持静 置 24小时左右,进行自然消泡。此时,氯化银颗粒均匀地分布在海藻酸钠溶液中; 5. 当纺丝原液中的绝大部分气泡消失后,所得纺丝原液就可以按一般的海藻 酸钙纤维挤出工艺, 即经过纺丝浴使海藻酸钠转化成海藻酸钙、 通过牵伸浴和牵 引辊抽伸排列分子链、 清洗、 干燥、 上油、 卷曲和切断;
6. 纺出的纤维为灰白色, 且其中银含量约 0.05重量%;
7. 使用传统的无纺工艺将纤维制备成无纺布。将制得的布切成 10x10cm, 并 包装到纸袋中。 得到的该敷料将通过 25-40千戈瑞的伽马辐照进行灭菌;
8. 得到含 0.05重量%的含银敷料。 实施例 13
制备含有次氯酸银颗粒的抗菌性纤维及其伤口敷料的方法:
1. 在搅拌容器中充入 114升的水;
2.在装有 114升水的搅拌容器中加入 5克硝酸银, 启动搅拌器, 使硝酸银均 匀分散在溶液中,然后按硝酸银和次氯酸钠 1:1的摩尔比加入 2.19克的次氯酸钠, 继续搅拌, 使形成的次氯酸银颗粒均匀分散于体系中。 再加入 1千克海藻酸钠粉 末, 持续搅拌;
3. 在保持搅拌器进行搅拌的同时,继续向搅拌容器中缓慢加入 5.74千克海藻 酸钠粉末;
4. 在充分地分散所有海藻酸钠后, 取出搅拌器, 并且使之在搅拌容器保持静 置 24小时左右, 进行自然消泡。此时, 次氯酸银颗粒均匀地分布在海藻酸钠溶液 中;
5. 当纺丝原液中的绝大部分气泡消失后,所得纺丝原液就可以按一般的海藻 酸钙纤维挤出工艺, 即经过纺丝浴使海藻酸钠转化成海藻酸钙、 通过牵伸浴和牵
引辊抽伸排列分子链、 清洗、 干燥、 上油、 卷曲和切断;
6. 纺出的纤维为灰白色, 且其中银含量约 0.05重量%;
7. 使用传统的无纺工艺将纤维制备成无纺布。将制得的布切成 10x10cm, 并 包装到纸袋中。 得到的该敷料将通过 25-40千戈瑞的伽马辐照进行灭菌;
8. 得到含 0.05重量%的含银敷料。 实施例 14
制备含有氯化银颗粒的抗菌性纤维及其伤口敷料的方法:
1. 在搅拌容器中充入 114升的水;
2.在装有 114升水的搅拌容器中加入 100克硝酸银, 启动搅拌器, 使硝酸银 均匀分散在溶液中, 然后按硝酸银和氯化钠 1:1的摩尔比加入 34.4克的氯化钠, 继续搅拌,使形成的氯化银颗粒均匀分散于体系中。再加入 1千克海藻酸钠粉末, 持续搅拌;
3. 在保持搅拌器进行搅拌的同时,继续向搅拌容器中缓慢加入 5.74千克的海 藻酸钠粉末;
4. 在充分地分散所有海藻酸钠后, 取出搅拌器, 并且使之在搅拌容器保持静 置 24小时左右,进行自然消泡。此时,氯化银颗粒均匀地分布在海藻酸钠溶液中;
5. 当纺丝原液中的绝大部分气泡消失后,所得纺丝原液就可以按一般的海藻 酸钙纤维挤出工艺, 即经过纺丝浴使海藻酸钠转化成海藻酸钙、 通过牵伸浴和牵 引辊抽伸排列分子链、 清洗、 干燥、 上油、 卷曲和切断;
6. 纺出的纤维为灰白色, 且其中银含量约 1重量%;
7. 使用传统的无纺工艺将纤维制备成无纺布。将制得的布切成 10x10cm, 并 包装到纸袋中。 得到的该敷料将通过 25-40千戈瑞的伽马辐照进行灭菌;
8. 得到含 1重量%的含银敷料。 实施例 15
制备含有次氯酸银颗粒的抗菌性纤维及其伤口敷料的方法:
1. 在搅拌容器中充入 114升的水;
2.在装有 114升水的搅拌容器中加入 100克硝酸银, 启动搅拌器, 使硝酸银 均匀分散在溶液中, 然后按硝酸银和次氯酸钠 1:1的摩尔比加入 43.8克的次氯酸 钠, 继续搅拌, 使形成的次氯酸银颗粒均匀分散于体系中。 再加入 1千克海藻酸 钠粉末, 持续搅拌;
3. 在保持搅拌器进行搅拌的同时,继续向搅拌容器中缓慢加入 5.74千克的海 藻酸钠粉末;
4. 在充分地分散所有海藻酸钠后, 取出搅拌器, 并且使之在搅拌容器保持静 置 24小时左右, 进行自然消泡。此时, 次氯酸银颗粒均匀地分布在海藻酸钠溶液
中;
5. 当纺丝原液中的绝大部分气泡消失后,所得纺丝原液就可以按一般的海藻 酸钙纤维挤出工艺, 即经过纺丝浴使海藻酸钠转化成海藻酸钙、 通过牵伸浴和牵 引辊抽伸排列分子链、 清洗、 干燥、 上油、 卷曲和切断;
6. 纺出的纤维为灰白色, 且其中银含量约 1重量%;
7. 使用传统的无纺工艺将纤维制备成无纺布。将制得的布切成 10x10cm, 并 包装到纸袋中。 得到的该敷料将通过 25-40千戈瑞的伽马辐照进行灭菌;
8. 得到含 1重量%的含银敷料。 实施例 16
制备含有氯化银颗粒的抗菌性纤维及其伤口敷料的方法:
1. 在搅拌容器中充入 114升的水;
2.在装有 114升水的搅拌容器中加入 1000克硝酸银, 启动搅拌器, 使硝酸银 均匀分散在溶液中, 然后按硝酸银和氯化钠 1:1的摩尔比加入 344克的氯化钠, 继续搅拌,使形成的氯化银颗粒均匀分散于体系中。再加入 1千克海藻酸钠粉末, 持续搅拌;
3. 在保持搅拌器进行搅拌的同时,继续向搅拌容器中缓慢加入 5.74千克的海 藻酸钠粉末;
4. 在充分地分散所有海藻酸钠后, 取出搅拌器, 并且使之在搅拌容器保持静 置 24小时左右,进行自然消泡。此时,氯化银颗粒均匀地分布在海藻酸钠溶液中;
5. 当纺丝原液中的绝大部分气泡消失后,所得纺丝原液就可以按一般的海藻 酸钙纤维挤出工艺, 即经过纺丝浴使海藻酸钠转化成海藻酸钙、 通过牵伸浴和牵 引辊抽伸排列分子链、 清洗、 干燥、 上油、 卷曲和切断;
6. 纺出的纤维为灰白色, 且其中银含量约 1重量%;
7. 使用传统的无纺工艺将纤维制备成无纺布。将制得的布切成 10xl0cm, 并 包装到纸袋中。 得到的该敷料将通过 25-40千戈瑞的伽马辐照进行灭菌;
8. 得到含 10重量%的含银敷料。 实施例 17
制备含有次氯酸银颗粒的抗菌性纤维及其伤口敷料的方法:
1. 在搅拌容器中充入 114升的水;
2.在装有 114升水的搅拌容器中加入 1000克硝酸银, 启动搅拌器, 使硝酸银 均匀分散在溶液中, 然后按硝酸银和次氯酸钠 1:1的摩尔比加入 438克的次氯酸 钠, 继续搅拌, 使形成的次氯酸银颗粒均匀分散于体系中。 再加入 1千克海藻酸 钠粉末, 持续搅拌;
3. 在保持搅拌器进行搅拌的同时,继续向搅拌容器中缓慢加入 5.74千克的海
藻酸钠粉末;
4. 在充分地分散所有海藻酸钠后, 取出搅拌器, 并且使之在搅拌容器保持静 置 24小时左右, 进行自然消泡。此时, 次氯酸银颗粒均匀地分布在海藻酸钠溶液 中;
5. 当纺丝原液中的绝大部分气泡消失后,所得纺丝原液就可以按一般的海藻 酸钙纤维挤出工艺, 即经过纺丝浴使海藻酸钠转化成海藻酸钙、 通过牵伸浴和牵 引辊抽伸排列分子链、 清洗、 干燥、 上油、 卷曲和切断;
6. 纺出的纤维为灰白色, 且其中银含量约 1重量%;
7. 使用传统的无纺工艺将纤维制备成无纺布。将制得的布切成 10x10cm, 并 包装到纸袋中。 得到的该敷料将通过 25-40千戈瑞的伽马辐照进行灭菌;
8. 得到含 10重量%的含银敷料。 实施例 18
银离子的释放
为了观察敷料的银离子释放特性,将实施例 1中的含银敷料切成 2.5Cmx2.5cm 之后, 放入 10ml伤口模拟液中, 37°C水浴, 60-80rpm连续振荡 7天, 并于 24小 时、 72小时和 168小时取出样品, 测试 10ml伤口模拟液中银释放量。 表 1显示 了敷料在 10ml伤口模拟液中的银释放量, 可以看出, 敷料在 7天内银释放量呈 上升趋势, 在 168小时 (即 7天) 敷料银释放量达到 38.4ppm。 表 1 敷料在 10ml伤口模拟液中的银释放量 时间 (小时) 银释放量 (ppm)
24 20.3
72 36.1
168 38.4
Claims
1、一种经湿法纺丝制备的含银纤维伤口敷料,其特征在于含银纤维是将硝酸 银直接搅拌在高聚物纺丝液中, 随后经湿法纺丝制备的, 按有效含银量计算, 银 离子占高聚物的含量为 0.01-10重量%, 优选地, 银离子占高聚物的比例为 0.1-7 重量%。
2、根据权利要求 1所述的经湿法纺丝制备的含银纤维伤口敷料,其特征在于 所述高聚物是壳聚糖纤维或海藻酸盐纤维。
3、根据权利要求 2所述的经湿法纺丝制备的含银纤维伤口敷料,其特征在于 所述海藻酸盐纤维为高甘露糖醛酸型或者高古洛糖醛酸型或者甘露糖醛酸 /古洛 糖醛酸混合型纤维。
4、根据权利要求 3所述的经湿法纺丝制备的含银纤维伤口敷料,其特征在于 所述海藻酸盐纤维为海藻酸钙纤维或者海藻酸钙 /钠纤维。
5、根据权利要求 2所述的经湿法纺丝制备的含银纤维伤口敷料,其特征在于 所述壳聚糖纤维是脱乙酰度在 80%以上的含银壳聚糖纤维。
6、根据权利要求 2所述的经湿法纺丝制备的含银纤维伤口敷料,其特征在于 所述壳聚糖纤维通过羧甲基化或酰化进行化学改性。
7、根据权利要求 1所述的经湿法纺丝制备的含银纤维伤口敷料,其特征在于 所述含银纤维的线密度为 l-5dtex, 纤维长度为 5-125mm。
8、根据权利要求 1所述的经湿法纺丝制备的含银纤维伤口敷料,其特征在于 所述含银纤维伤口敷料是一种针刺非织造布,其对 A溶液的吸收量为 1200%以上, 纵向湿强度不小于 0.3N/cm, 横向湿强度不小于 0.4 N/cm。
9、一种制备根据权利要求 1所述的经湿法纺丝制备的含银纤维伤口敷料的方 法, 其包括下列步骤:
a) 将硝酸银溶解在水中;
b)将高聚物加入到所得硝酸银溶液中并搅拌成纺丝液,银离子占高聚物的比 例为 0.01-10重量%;
c) 将所得纺丝液通过溶液纺丝工艺制备成含银的抗菌性纤维;
d) 将所得纤维通过非织造、 机织或针织工艺或者化学粘合工艺加工成织物; e) 将所得织物切割, 并灭菌、 包装, 得到所述的敷料。
10、根据权利要求 9所述的方法,其特征在于在所述步骤 a)和步骤 b)之间, 向所述硝酸银溶液中加入次氯酸钠, 次氯酸钠占高聚物比例为 0.005%-2%。
11、根据权利要求 9所述的方法,其特征在于在所述步骤 a)和步骤 b)之间, 向所述硝酸银溶液中加入氯化钠, 氯化钠占高聚物比例为 0.001%-11.0%。
12、 一种用于制备含有银离子的溶液型抗菌性纤维的方法, 其特征在于, 先 将一部分纺丝高聚物加入搅拌容器中溶解, 预先溶解的高聚物的用量要使容器中 溶液的粘度达到 200-1000厘泊之间,再在持续搅拌的条件下将银离子溶液加入到 搅拌容器中, 搅拌 20-90分钟, 最后再加入剩余纺丝高聚物, 然后脱泡、 纺丝。
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| EP13782055.1A EP2842580B1 (en) | 2012-04-23 | 2013-04-18 | Silvery antibacterial fibre, texture, and wound dressing, and preparation method thereof |
| US17/090,954 US20210052767A1 (en) | 2012-04-23 | 2020-11-06 | Antimicrobial fiber comprising silver, fabric and wound dressing comprising the antimicrobial fiber, and methods for manufacturing the fiber, the fabric, and the wound dressing |
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| US14/437,220 A-371-Of-International US20150297411A1 (en) | 2012-04-23 | 2013-04-18 | Silver containing antimicrobial fibre, fabric and wound dressing and its method of manufacturing |
| US17/090,954 Continuation-In-Part US20210052767A1 (en) | 2012-04-23 | 2020-11-06 | Antimicrobial fiber comprising silver, fabric and wound dressing comprising the antimicrobial fiber, and methods for manufacturing the fiber, the fabric, and the wound dressing |
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| Publication number | Publication date |
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| US20150297411A1 (en) | 2015-10-22 |
| EP2842580B1 (en) | 2019-09-25 |
| CN103170004B (zh) | 2016-08-31 |
| CN103170004A (zh) | 2013-06-26 |
| EP2842580A4 (en) | 2015-12-30 |
| EP2842580A1 (en) | 2015-03-04 |
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