CN116103933A - Preparation method of high-fastness double-layer combined silk fibroin coated fabric - Google Patents
Preparation method of high-fastness double-layer combined silk fibroin coated fabric Download PDFInfo
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- CN116103933A CN116103933A CN202310143882.6A CN202310143882A CN116103933A CN 116103933 A CN116103933 A CN 116103933A CN 202310143882 A CN202310143882 A CN 202310143882A CN 116103933 A CN116103933 A CN 116103933A
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- 239000011248 coating agent Substances 0.000 claims abstract description 67
- 239000010410 layer Substances 0.000 claims abstract description 32
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- 239000002002 slurry Substances 0.000 claims abstract description 15
- 239000002356 single layer Substances 0.000 claims abstract description 14
- 238000007731 hot pressing Methods 0.000 claims abstract description 13
- 239000000758 substrate Substances 0.000 claims abstract description 13
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- 238000000034 method Methods 0.000 claims description 27
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 claims description 20
- LLSDKQJKOVVTOJ-UHFFFAOYSA-L calcium chloride dihydrate Chemical compound O.O.[Cl-].[Cl-].[Ca+2] LLSDKQJKOVVTOJ-UHFFFAOYSA-L 0.000 claims description 14
- 229940052299 calcium chloride dihydrate Drugs 0.000 claims description 14
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 claims description 10
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- 238000006243 chemical reaction Methods 0.000 claims description 6
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 5
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- 238000007711 solidification Methods 0.000 claims description 5
- 230000008023 solidification Effects 0.000 claims description 5
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 4
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- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 3
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 2
- 239000006229 carbon black Substances 0.000 claims description 2
- GDVKFRBCXAPAQJ-UHFFFAOYSA-A dialuminum;hexamagnesium;carbonate;hexadecahydroxide Chemical compound [OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Al+3].[Al+3].[O-]C([O-])=O GDVKFRBCXAPAQJ-UHFFFAOYSA-A 0.000 claims description 2
- 229960001545 hydrotalcite Drugs 0.000 claims description 2
- 229910001701 hydrotalcite Inorganic materials 0.000 claims description 2
- 229920000570 polyether Polymers 0.000 claims description 2
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- 229940051841 polyoxyethylene ether Drugs 0.000 claims description 2
- 239000004575 stone Substances 0.000 claims description 2
- 238000010345 tape casting Methods 0.000 claims description 2
- DHKHKXVYLBGOIT-UHFFFAOYSA-N acetaldehyde Diethyl Acetal Natural products CCOC(C)OCC DHKHKXVYLBGOIT-UHFFFAOYSA-N 0.000 claims 1
- 125000002777 acetyl group Chemical class [H]C([H])([H])C(*)=O 0.000 claims 1
- 238000003825 pressing Methods 0.000 claims 1
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- 239000007788 liquid Substances 0.000 abstract description 7
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- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 2
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- 230000006978 adaptation Effects 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
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- 229960002713 calcium chloride Drugs 0.000 description 2
- 239000001110 calcium chloride Substances 0.000 description 2
- 229910001628 calcium chloride Inorganic materials 0.000 description 2
- 239000006255 coating slurry Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000008367 deionised water Substances 0.000 description 2
- 229910021641 deionized water Inorganic materials 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000004090 dissolution Methods 0.000 description 2
- 238000005187 foaming Methods 0.000 description 2
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- 238000005259 measurement Methods 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
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- 238000009825 accumulation Methods 0.000 description 1
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- 235000011187 glycerol Nutrition 0.000 description 1
- 238000009775 high-speed stirring Methods 0.000 description 1
- 239000003094 microcapsule Substances 0.000 description 1
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- 238000007639 printing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
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Images
Classifications
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/0056—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the compounding ingredients of the macro-molecular coating
- D06N3/0061—Organic fillers or organic fibrous fillers, e.g. ground leather waste, wood bark, cork powder, vegetable flour; Other organic compounding ingredients; Post-treatment with organic compounds
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/0056—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the compounding ingredients of the macro-molecular coating
- D06N3/0063—Inorganic compounding ingredients, e.g. metals, carbon fibres, Na2CO3, metal layers; Post-treatment with inorganic compounds
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/007—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by mechanical or physical treatments
- D06N3/0077—Embossing; Pressing of the surface; Tumbling and crumbling; Cracking; Cooling; Heating, e.g. mirror finish
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/0086—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the application technique
- D06N3/0088—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the application technique by directly applying the resin
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N2209/00—Properties of the materials
- D06N2209/16—Properties of the materials having other properties
- D06N2209/1664—Releasability
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N2209/00—Properties of the materials
- D06N2209/16—Properties of the materials having other properties
- D06N2209/1685—Wear resistance
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N2213/00—Others characteristics
- D06N2213/02—All layers being of the same kind of material, e.g. all layers being of polyolefins, all layers being of polyesters
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Laminated Bodies (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
Abstract
The invention discloses a preparation method of a high-fastness double-layer combined silk fibroin coated fabric, which comprises the steps of placing a fabric substrate in silk fibroin coated functional solvent liquid for full padding, coating on both sides by a scraper, forming a film in a water bath, and drying to obtain a single-layer silk fibroin coated fabric. And uniformly coating the single-layer silk fibroin coating fabric with silk fibroin adhesive slurry through a laminating machine, and then carrying out hot pressing film forming to finally obtain the double-layer silk fibroin coating fabric, wherein the coating fabric has good dry and wet friction fastness, and can be endowed with functionality according to requirements to meet the use requirement of multiple scenes.
Description
Technical Field
The invention relates to the field of silk fibroin coating preparation in fabrics, in particular to a preparation method of a high-fastness double-layer combined silk fibroin coating fabric.
Background
The silk fibroin is a protein extracted from silk, accounting for about 70% -80% of the silk, has good mechanical property and physicochemical property, and can be prepared into materials with various forms such as films, gels, microcapsules and the like, so that the recycling of waste silk fibroin fibers is very valuable. The technology of silk fibroin coating is to dissolve waste silk fibroin fibers and slurry products by the solvation of an ionic solution, add a certain amount of film forming auxiliary agent and functional filler, uniformly disperse the film forming auxiliary agent and the functional filler in a high-speed stirring mode to prepare silk fibroin functional solution, and apply the silk fibroin functional solution on textiles in a single/double-sided knife coating mode to realize recycling of silk fibroin again and further play the value of the silk fibroin.
At present, the more commonly used preparation methods of the silk fibroin film include a sol-gel method, a spin coating method, a coating-evaporating method, a spraying method and the like. For example Ji Xunming et al obtain thick silk fibroin coatings with a fine and smooth surface by spraying (Ji Xunming, li Ming, plateau, yin Zhichen, ding Yuchuan, bao Luzi, jiang Miaowen, li Saijie, wu Longfei, wu Chuanjie. A method for preparing silk fibroin coatings. Beijing: CN110982429B, 2021-09-03.). Zhou Jidong the silk fibroin coating with antibacterial and anti-wrinkle functions is obtained by a sol-gel method (Zhou Jidong. A fabric finishing process using silk fibroin as medium [ P ]. Thunb river province: CN105544209B, 2018-02-09.).
Because of the variability of silk fibroin, the film plating mode of all silk fibroin coatings is complicated, the obtained coating film and the coated substrate have no binding force, and the film layer is easy to crack and fall off. Meanwhile, as the coating slurry is liquid, the viscosity is low, the thickness of the coating film and the uniformity degree of the coating are difficult to adjust, and meanwhile, the coating solution is easily affected by temperature and humidity, and gel phenomenon is easily generated in the using or preserving process, so that the preparation efficiency is reduced.
Disclosure of Invention
The invention aims to provide a preparation method of a high-fastness double-layer combined silk fibroin coated fabric. In particular to a production method of silk fibroin coated textiles with high fastness in daily use, different functional fillers can be added into a middle layer according to requirements to endow the coatings with different functions, the use value of the silk fibroin coated textiles is improved, a hot-pressing method is used for reinforcing the coatings on the outermost layer, the high fastness is endowed to the coatings, coating defects caused by exposed fillers and poor coating functions caused by filler loss are reduced, and therefore silk fibroin coated textiles with excellent dry and wet friction fastness and multiple functions can be obtained.
The technical scheme of the invention is as follows: the preparation method of the high-fastness double-layer combined silk fibroin coated fabric comprises the following steps:
the component A is coated on the surface of a fabric in a blade coating manner by a wet solidification mode, and then the component B is coated on the surface of the fabric in a blade coating manner by hot pressing solidification to form a double-layer silk fibroin coated fabric, wherein the component A comprises the following components in percentage by mass based on 100% of the total mass:
the component B comprises the following components in percentage by mass based on 100% of the total mass:
the preparation of the component A specifically comprises the following steps:
adding water, formic acid and calcium chloride dihydrate into a reactor in sequence, reacting for 30-40 min (preferably 35 min) until the calcium chloride dihydrate is completely dissolved, adding silk fibroin, raising the reaction temperature to 30-50 ℃ (preferably 50 ℃) to enable the silk fibroin to be fully soaked for 10-30 min (preferably 20 min), sequentially adding functional filler and defoamer, and stirring for 10-20 min (preferably 20 min) to obtain crude silk fibroin functional solution, namely the component A.
The functional filler is one of nano calcium carbonate powder, yunnan white stone powder, superfine white carbon black powder, hydrotalcite and the like.
The defoaming agent is one of GP type glycerin polyether, GPE type polyoxyethylene ether and PPG type polypropylene glycol.
The preparation of the component B specifically comprises the following steps:
sequentially adding water, formic acid and calcium chloride dihydrate into a reactor, reacting for 30-40 min (preferably 35 min) until the calcium chloride dihydrate is completely dissolved, adding silk fibroin, heating the reaction temperature to 30-50 ℃ (preferably 50 ℃) to fully infiltrate the silk fibroin for 10-30 min (preferably 20 min), adding a film forming additive, and stirring for 10-20 min (preferably 20 min) to obtain the crude silk fibroin functional solution. Filtering with a 35-mesh fine net to remove impurities to obtain silk fibroin dissolving solution. Mixing 1-2 times (preferably 2 times) ethanol solution into silk fibroin solution, stirring for 10-30 min (preferably 30 min), standing for about 5-10 min (preferably 10 min) for layering, and removing liquid phase to obtain silk fibroin viscous slurry, namely component B.
The film forming auxiliary agent is one of polyvinyl alcohol and polyvinyl alcohol Ding Quanzhi.
The silk fibroin is silk fabrics with the silk fibroin content of more than 80 percent.
The formic acid/calcium chloride ion solution in the method has strong dissolving capacity, can realize recycling of waste silk fabrics, and has the silk fibroin content of more than 80 percent, too low content can cause more impurities and poor coating cleanliness.
A method for preparing a silk fibroin coating by coating components a and B on a fabric substrate twice, which is characterized by comprising the following steps:
and (3) placing the fabric substrate in silk fibroin coating functional solvent liquid for full padding, coating on both sides by a scraper, forming a film in a water bath, and drying to obtain the single-layer silk fibroin coating fabric. And uniformly coating the single-layer silk fibroin coating fabric with silk fibroin adhesive slurry through a laminating machine, and then carrying out hot pressing film forming to obtain the double-layer silk fibroin coating fabric.
The padding time is 3-10 s, the water bath temperature is 20-30 ℃, and the film forming time is 3-10 s.
The temperature of the oven is 100-150 ℃, and the drying time is 60-120 s.
The coverage amount of the silk fibroin adhesive slurry passing through the film laminating machine on the fabric is 0.5-1 g/cm 2 。
The temperature of the hot press is 100-120 ℃, and the hot press time is 3-5 s.
The silk fibroin coating functional solvent liquid can be added with different functional fillers according to requirements to endow the coated fabric with different functions to meet different scene applications, the functionality of the coated fabric can be greatly improved, the silk fibroin adhesive slurry is uniformly coated on a single-layer silk fibroin coating fabric through a film laminating machine and then subjected to hot pressing film forming, finally the double-layer silk fibroin coating fabric is obtained, the outermost silk fibroin hot pressing film has high fastness and high strength, plays a role in reinforcing and protecting a middle functional coating, and simultaneously reduces the problems of coating defects caused by exposed fillers, poor coating functions caused by filler loss and the like
The raw material fibers adopted by the coated fabric are not absolutely limited, and different fibers and different yarns can be selected for weave according to different use environments. Of these, the preferred textile is a 70D polyester/ammonia blend fabric.
The silk fibroin coating functional dissolving liquid has a certain dissolving effect on a base material, can not be soaked for a long time, and avoids the occurrence of broken belts.
The method comprises the steps of coating silk fibroin adhesive slurry on a single-layer silk fibroin coated fabric, and then performing hot pressing to form a film again. The temperature of the hot press is 100-120 ℃, and the hot press time is 3-5 s. The silk fibroin adhesive slurry has high film forming speed at high temperature and high pressure, can be rapidly formed into films, shortens the film forming time, forms a high-fastness coating, causes coating foaming defects when the hot pressing temperature is too high and too long, slows down the film forming speed when the temperature is too low, and influences the production efficiency.
The thickness of the final coated fabric is 0.2-0.26 mm, and the silk fibroin coating covered on the surface of the coated fabric is uniformly coated without obvious defects.
According to GB/T3920-2008 "rubbing fastness to textile color fastness test" and GB/T3920-2008 "soaping fastness to textile color fastness test", the rubbing color fastness of the coated fabric after being used for printing is greater than or equal to level 4, and the soaping fastness is greater than or equal to level 4.
According to GB/T7573-2009 determination of pH value of textile aqueous extract, the pH value of the coated fabric is 6.8-7.2, which accords with environmental protection standards.
Compared with the prior art, the invention has the following beneficial effects:
1) The formic acid/calcium chloride ion solution system used in the invention has high efficiency and high dissolution rate, and the obtained silk fibroin coating functional solvent liquid has a certain dissolution effect on the substrate, can slightly corrode the surface of the substrate, infiltrates into the substrate, can quickly fill the gaps of the substrate with silk fibroin and filler, reduces filler loss, enhances the mechanical binding force between the coating and the substrate, and improves the coating fastness. Meanwhile, after the intermediate layer is subjected to water bath exchange to form a film, uniform pores are formed on the surface.
2) The outermost layer of the invention adopts a hot-pressing film forming method, has no damage to a base material, can be quickly embedded into the surface pores of the single-layer silk fibroin coating, improves the coating fastness, has high strength and high fastness, can strengthen and protect an intermediate functional coating, and simultaneously reduces the problems of coating defects caused by exposed filler, poor coating functions caused by filler loss and the like.
3) The method for coating twice realizes the combinability of the coating, effectively solves the problems of powder rising, foaming, bar rising and other defects caused by the precipitation of the filler in the coating slurry in the coating processing process, and effectively improves the surface flatness of the coated fabric. Greatly improves the actual production quality and improves the storage and winding problems of the coated fabric.
Drawings
FIG. 1 is a SEM of the surface morphology of a single-layer silk fibroin coating;
FIG. 2 is a SEM of the surface morphology of a bilayer combined silk fibroin.
Detailed Description
The present invention will be further described with reference to specific examples, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent substitutions or modifications made on the basis of the present invention to solve the substantially same technical problems and achieve the substantially same technical effects are encompassed within the scope of the present invention.
In the specific embodiment of the invention, the component A is a silk fibroin functional solution, and the preparation method specifically comprises the following steps:
adding water, formic acid and calcium chloride dihydrate into a reactor in sequence, reacting for 35min until the calcium chloride dihydrate is completely dissolved, adding silk fibroin, heating the reaction temperature to 50 ℃ to enable the silk fibroin to be fully soaked for 20min, adding functional filler and defoamer in sequence, and starting stirring for 20min to obtain crude silk fibroin functional solution.
Component B is silk fibroin viscous slurry, and the preparation of the silk fibroin viscous slurry specifically comprises the following steps:
sequentially adding water, formic acid and calcium chloride dihydrate into a reactor, reacting for 35min until the calcium chloride dihydrate is completely dissolved, adding silk fibroin, heating the reaction temperature to 50 ℃ to fully infiltrate the silk fibroin for 20min, adding a film forming additive, and stirring for 20min to obtain a crude silk fibroin functional solution. Filtering with a 35-mesh fine net to remove impurities to obtain silk fibroin dissolving solution. Mixing ethanol solution with volume of 2 times into silk fibroin solution, stirring for 30min, standing for about 10min for layering, and removing liquid phase to obtain silk fibroin viscous slurry.
The application process for preparing the high-fastness double-layer combined silk fibroin coated fabric specifically comprises the following steps:
1) Preparation of a monolayer silk fibroin coating:
and (3) placing the fabric substrate in silk fibroin coating functional solvent liquid for full padding for 5s, coating on the two sides by a scraper, forming a film in a water bath at 25 ℃ for 5s, and drying at 120 ℃ for 80s to obtain the single-layer silk fibroin coating fabric.
2) Preparation of double-layer combined silk fibroin coating:
the silk fibroin viscous slurry was then processed by a laminator to a concentration of 0.8g/cm 2 And uniformly coating a single-layer silk fibroin coated fabric, and then carrying out hot pressing at 120 ℃ for 3s to form a film, thereby obtaining the double-layer silk fibroin coated fabric.
Examples 1 to 5 and comparative examples 1 to 3:
the 70D polyester/ammonia blended fabric is taken as a substrate, the preparation of the component A is carried out according to the following formula of table 1, the preparation of the component B is carried out according to the formula of table 2, the single film forming is carried out according to the process of table 3, and the double film forming is carried out according to the process of table 4, so that the high-fastness double-layer combined silk fibroin coating is obtained.
Table 1 component A recipe (Kg)
| Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | |
| Calcium chloride dihydrate | 5 | 6.2 | 7.5 | 8.8 | 10 |
| Formic acid | 15 | 18 | 22 | 26 | 30 |
| Silk fibroin | 5 | 6.2 | 7.5 | 8.8 | 10 |
| Functional filler | 5 | 9 | 12 | 16 | 20 |
| Defoaming agent | 0.1 | 0.15 | 0.2 | 0.25 | 0.3 |
Remarks: the rest is deionized water, and the total mass of the slurry is 100kg.
Table 2 component A recipe (Kg)
| Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | |
| Calcium chloride dihydrate | 5 | 6.2 | 7.5 | 8.8 | 10 |
| Formic acid | 15 | 18 | 22 | 26 | 30 |
| Silk fibroin | 5 | 6.2 | 7.5 | 8.8 | 10 |
| Film forming aid | 0.5 | 0.6 | 0.7 | 0.8 | 1 |
Remarks: the rest is deionized water, and the total mass of the slurry is 100kg.
TABLE 3 Single film Forming Process index
TABLE 4 Secondary film Forming Process index
TABLE 5 detection results
Description of characterization methods involved in examples, comparative examples:
the rubbing fastness test refers to GB/T3920-2008 "rubbing fastness for textile color fastness test";
the washing fastness test is to test the washing fastness of the coated fabric by referring to GB/T3920-2008 "washing fastness of textile fastness test".
The coating thickness was obtained by thickness gauge measurement (Shanghai Seai Seagaku Co., ltd. Coating thickness gauge). Stiffness reference GB/T7689.4-2013 part 4 of the reinforcement woven fabric test method: flexural stiffness measurements were performed.
The pH was tested with reference to GB/T7573-2009 determination of pH value of textile Water extract.
The detection results are shown in Table 5.
FIG. 1 is a single-layer silk fibroin coating surface morphology SEM of example 5, and FIG. 2 is a double-layer combined silk fibroin surface morphology SEM of example 5;
as can be seen from comparison of fig. 1 and 2, the surface of the single silk fibroin coating has material accumulation, a large number of pores are formed on the surface of the coating, and the surface of the silk fibroin coated fabric prepared by the secondary hot pressing film forming is smooth.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that the above-mentioned preferred embodiment should not be construed as limiting the invention, and the scope of the invention should be defined by the appended claims. It will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the spirit and scope of the invention, and such modifications and adaptations are intended to be comprehended within the scope of the invention.
Claims (10)
1. The preparation method of the high-fastness double-layer combined silk fibroin coated fabric is characterized by comprising the following steps of:
the component A is coated on the surface of the fabric in a blade coating manner by a wet method to form a film, and then the component B is coated on the surface of the fabric in a blade coating manner to form a film by hot pressing and solidification to prepare the double-layer silk fibroin coated fabric;
wherein, the component A adopts the following components in percentage by mass based on 100% of the total mass:
the component B comprises the following components in percentage by mass based on 100% of the total mass:
2. the method for preparing the high-fastness double-layer combined silk fibroin coated fabric according to claim 1, wherein the preparation of the component A specifically comprises the following steps:
adding water, formic acid and calcium chloride dihydrate into a reactor in sequence, reacting for 30-40 min until the calcium chloride dihydrate is completely dissolved, adding silk fibroin, heating the reaction temperature to 30-50 ℃ to enable the silk fibroin to be fully soaked for 10-30 min, sequentially adding functional filler and defoamer, and starting stirring for 10-20 min to obtain crude silk fibroin functional solution, namely the component A.
3. The method for preparing the high-fastness double-layer combined silk fibroin coated fabric according to claim 1, wherein the preparation of the component B specifically comprises the following steps:
sequentially adding water, formic acid and calcium chloride dihydrate into a reactor, reacting for 30-40 min until the calcium chloride dihydrate is completely dissolved, adding silk fibroin, heating the reaction temperature to 30-50 ℃ to enable the silk fibroin to be fully soaked for 10-30 min, adding a film forming additive, and stirring for 10-20 min to obtain a crude silk fibroin functional solution;
filtering with a net to remove impurities to obtain silk fibroin solution, mixing ethanol solution with the volume 1-2 times of that of the silk fibroin solution into the silk fibroin solution, stirring for 10-30 min, standing for 5-10 min for layering, and removing liquid phase to obtain silk fibroin viscous slurry, namely component B.
4. The method for preparing the high-fastness double-layer combined silk fibroin coated fabric according to claim 1, wherein the functional filler is one of nano calcium carbonate powder, yunnan white stone powder, white carbon black powder and hydrotalcite.
5. The method for preparing the high-fastness double-layer combined silk fibroin coated fabric according to claim 1, wherein the defoamer is one of GP type glycerol polyether, GPE type polyoxyethylene ether and PPG type polypropylene glycol.
6. The method for preparing a high-fastness double-layer combined silk fibroin coated fabric according to claim 1, wherein the film forming auxiliary agent is one of polyvinyl alcohol and polyvinyl acetal Ding Quanzhi.
7. The method for preparing the high-fastness double-layer combined silk fibroin coated fabric according to claim 1, comprising the following steps:
the component A is coated on the surface of the fabric in a blade coating way through a wet solidification mode to form a film, and the method specifically comprises the following steps:
placing the fabric substrate in the component A for full padding, coating the two sides of the fabric substrate by a scraper, forming a film in a water bath, and drying to obtain a single-layer silk fibroin coated fabric;
and then the component B is coated on the surface of the fabric in a knife coating way, and the thermal pressing solidification is carried out to obtain the double-layer silk fibroin coated fabric, which comprises the following steps:
and uniformly coating the component B on the single-layer silk fibroin coated fabric through a laminating machine, and then carrying out hot pressing to form a film to finally obtain the double-layer silk fibroin coated fabric.
8. The method for preparing a high-fastness double-layer combined silk fibroin coated fabric according to claim 7, wherein padding time is 3-10 s, film forming is carried out in a water bath at 20-30 ℃ for 3-10 s, and drying is carried out at 100-150 ℃ for 60-120 s.
9. The method for preparing a high-fastness double-layer combined silk fibroin coated fabric according to claim 7, wherein the coating amount of the component B on the fabric through a laminator is 0.5-1 g/cm 2 。
10. The method for preparing a high-fastness double-layer combined silk fibroin coated fabric according to claim 7, wherein the conditions of hot-press film forming are as follows: curing and forming the film at the temperature of 100-120 ℃ under a hot press for 3-5 s.
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