CN111764170A - Waterproof moisture-permeable film and preparation method thereof - Google Patents

Waterproof moisture-permeable film and preparation method thereof Download PDF

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Publication number
CN111764170A
CN111764170A CN202010572764.3A CN202010572764A CN111764170A CN 111764170 A CN111764170 A CN 111764170A CN 202010572764 A CN202010572764 A CN 202010572764A CN 111764170 A CN111764170 A CN 111764170A
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sbs
preparing
silicon dioxide
layer
permeable film
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CN111764170B (en
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赵瑾朝
黄乐平
张腾
徐兆宝
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Wuhan Textile University
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Wuhan Textile University
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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
    • D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/022—Non-woven fabric
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    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4282—Addition polymers
    • D04H1/4291—Olefin series
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
    • D04H1/72—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged
    • D04H1/728—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged by electro-spinning
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
    • D06M11/77—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with silicon or compounds thereof
    • D06M11/79—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with silicon or compounds thereof with silicon dioxide, silicic acids or their salts
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    • B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
    • B32B37/24—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer not being coherent before laminating, e.g. made up from granular material sprinkled onto a substrate
    • B32B2037/243—Coating
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    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
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    • B32B2250/20—All layers being fibrous or filamentary
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    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
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    • B32B2250/24—All layers being polymeric
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/02—Coating on the layer surface on fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/20—Inorganic coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
    • B32B2260/02—Composition of the impregnated, bonded or embedded layer
    • B32B2260/021—Fibrous or filamentary layer
    • B32B2260/023—Two or more layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
    • B32B2260/04—Impregnation, embedding, or binder material
    • B32B2260/046—Synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
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    • B32B2262/02—Synthetic macromolecular fibres
    • B32B2262/0276—Polyester fibres
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    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/726—Permeability to liquids, absorption
    • B32B2307/7265—Non-permeable
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    • B32B2535/00—Medical equipment, e.g. bandage, prostheses or catheter
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
    • D06M2101/16—Synthetic fibres, other than mineral fibres
    • D06M2101/18—Synthetic fibres consisting of macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M2101/20—Polyalkenes, polymers or copolymers of compounds with alkenyl groups bonded to aromatic groups
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
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    • D—TEXTILES; PAPER
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    • D06M2200/00—Functionality of the treatment composition and/or properties imparted to the textile material
    • D06M2200/01—Stain or soil resistance
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M2200/00—Functionality of the treatment composition and/or properties imparted to the textile material
    • D06M2200/10—Repellency against liquids
    • D06M2200/12—Hydrophobic properties
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
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    • D06M2200/00—Functionality of the treatment composition and/or properties imparted to the textile material
    • D06M2200/20—Treatment influencing the crease behaviour, the wrinkle resistance, the crease recovery or the ironing ease
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
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    • D06M2200/00—Functionality of the treatment composition and/or properties imparted to the textile material
    • D06M2200/50—Modified hand or grip properties; Softening compositions

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Laminated Bodies (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
  • Chemical Or Physical Treatment Of Fibers (AREA)

Abstract

The invention relates to a waterproof moisture-permeable membrane and a preparation method thereof. The base material is a conventionally used fabric, such as cotton, hemp, wool, polyester, terylene and the like, or a blended material of the raw materials; the SBS fiber layer is obtained by performing electrostatic spinning on SBS spinning solution, the poly-dopamine layer is formed by soaking a base material containing the SBS fiber layer in dopamine hydrochloride solution, and the silicon dioxide is hydrophobic silicon dioxide. Through the arrangement of the multilayer structure, the obtained film has good waterproof and moisture-permeable performance, the fabric containing the waterproof and moisture-permeable film can be used for manufacturing clothes, outdoor clothing, shoes and hats, medical supplies and the like, the obtained product has the effects of water repellency and stain resistance, and simultaneously has good moisture-removing and ventilating effects, sweat in clothes can be discharged, the effect of adjusting the internal temperature and humidity can be achieved, and the wearing comfort can be improved.

Description

Waterproof moisture-permeable film and preparation method thereof
Technical Field
The invention belongs to the field of textiles, and particularly relates to a waterproof moisture-permeable film and a preparation method thereof.
Background
The waterproof moisture-permeable film is a novel high-molecular waterproof material, one side of the waterproof moisture-permeable film can resist the permeation of external liquid water, and the other side of the waterproof moisture-permeable film can effectively transmit water vapor, so that the waterproof moisture-permeable film is called as 'second skin', and is widely applied to the fields of protective clothing, precise electronics, cultural relic protection, pharmacy and the like. When the performance of the waterproof moisture-permeable film is applied to the field of fabrics, the fabrics have the capability of preventing rainwater and snow water in the external environment from permeating from the outside to the inside, and meanwhile, the capability of rapidly transmitting and evaporating sweat in the inside to the outside through the fabrics is realized, so that the microclimate between people and clothes is regulated, and the dryness and the warmth of a wearer are kept.
There are 3 mechanisms by which a fabric achieves its waterproof and moisture-permeable properties: firstly, a high-density fabric with waterproof and moisture-permeable functions is designed by utilizing a gap natural diffusion mechanism. Usually, combed high-count cotton yarn or superfine fiber is used as a raw material, and water repellency treatment is carried out, so that the water-proof and moisture-permeable fabric has the effects of water resistance and moisture permeability. ② a microporous waterproof moisture permeable mechanism. The great difference between the diameters of the water vapor and the water drops is utilized to ensure that the diameter of the micropores is larger than that of the water vapor and smaller than that of the water drops, namely the diameter of the micropores is basically 0.2-0.5 mu m, thereby playing the role of intercepting rainwater and discharging sweat. And the mechanism of the moisture permeability of hydrophilic groups in pores between macromolecules. Water molecules are transferred from the high-humidity side to the low-humidity side along the hydrophilic groups on the hydrophilic chains in the order of adsorption-diffusion-desorption by virtue of hydrogen bonds and other intermolecular forces, thereby achieving moisture permeability.
Polyurethane or polytetrafluoroethylene materials are mostly used in the prior art to prepare waterproof and moisture permeable fabrics, for example, CN108676144A discloses an aqueous polyurethane dispersion for waterproof and moisture permeable fabric coating, and a preparation method and application thereof. According to the aqueous polyurethane dispersion, a strong hydrophilic hydroxyl side group aggregated into clusters is introduced into a main chain through a special micromolecule chain extender, and the aqueous polyurethane dispersion and a weak hydrophilic ether bond on a branched chain form a synergistic effect through the strong hydrophilic hydroxyl side group, so that the one-way movement of water in a fabric from inside to outside is facilitated, the problem that the water pressure and the moisture permeability are mutually restricted is balanced, and meanwhile, good waterproof and moisture permeability performances are obtained; CN105968305A discloses a waterproof moisture-permeable polyurethane material and a preparation method thereof, and relates to a polyol modified silicon dioxide hybrid polyurethane material with waterproof moisture-permeable function and a preparation method thereof. A plurality of hydroxyl groups on the surfaces of the polyol modified silica nanoparticles are reacted with isocyanate at two ends of a polyurethane prepolymer to form a polyurethane material with a space net structure. The appropriate amount of polyol modified nano silicon dioxide can play a role in adjusting the glass transition temperature of the soft segment of polyurethane so as to realize the intelligent waterproof and moisture permeable functions. Meanwhile, a proper amount of polyol modified nano silicon dioxide forms physical cross-linking points together with hard segments in polyurethane molecules, so that the spatial network structure strength of polyurethane can be increased, and the water resistance is enhanced; CN101532257A discloses a processing method of a waterproof and moisture permeable polytetrafluoroethylene microporous film laminated fabric, which comprises the steps of sequentially coating a primer and a surface coating on a polytetrafluoroethylene microporous film to form a polytetrafluoroethylene and polyurethane composite film, and finally bonding the composite film and a fiber fabric through a point-shaped adhesive. In the method, because the solid content of polyurethane in the primer is lower, the polyurethane can conveniently permeate into the polytetrafluoroethylene microporous film; the coupling agent is added, so that the bonding strength of the polyurethane and the polytetrafluoroethylene is improved; the surface coating is added with inorganic pigment, which can endow polyurethane with color and enhance the aesthetic effect.
However, the hydrophilic polyurethane film has poor air permeability and is easy to be wetted and deformed when meeting water, and in addition, the polyurethane synthesis needs to select the variety, content, polymerization process and the like of corresponding monomers to obtain the film with waterproof and moisture-permeable performances, so that the complexity of the preparation process of the waterproof and moisture-permeable film is increased; although the polytetrafluoroethylene membrane hydrophobic membrane has excellent waterproof and moisture-permeable performances, the membrane is difficult to naturally degrade, the preparation procedure is complex, and the production conditions are severe.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a waterproof moisture-permeable film with excellent performance, a waterproof moisture-permeable fabric and a preparation method thereof.
In order to achieve the purpose, the invention provides a waterproof moisture-permeable film which sequentially comprises a substrate, an SBS fiber layer, a polydopamine layer and a silicon dioxide layer.
The substrate is a conventionally used fabric material, such as one or more of cotton, hemp, wool, polyester, terylene and acrylic fibers or a blended material of any one or more of the raw materials.
The SBS fiber layer is formed by a conventional spinning method, such as electrostatic spinning.
The silicon dioxide layer is hydrophobic silicon dioxide.
The application also provides a preparation method of the waterproof moisture-permeable film, which specifically comprises the following steps: step one, preparing a substrate material;
step two: preparing an SBS fiber layer, namely preparing an SBS spinning solution, and spinning the SBS spinning solution on the surface of a substrate by using an electrostatic spinning method to form the SBS fiber layer to obtain a substrate material containing the SBS fiber layer;
step three, preparing a polydopamine layer, preparing a dopamine acid solution, soaking the substrate material containing the SBS fiber layer obtained by the treatment in the step two in the dopamine acid solution for a period of time, taking out and airing to obtain the substrate material containing the polydopamine layer and the SBS fiber layer;
and step four, preparing a silicon dioxide layer, namely preparing a silicon dioxide dispersion liquid, dispersing silicon dioxide in a solvent to form the silicon dioxide dispersion liquid, spraying the silicon dioxide dispersion liquid on the substrate material obtained in the step three, and drying to obtain the silicon dioxide layer.
The base material in the first step can be a conventionally used fabric, such as cotton, hemp, wool, polyester, acrylic, polyester, and the like, or a blend of one or more of the above.
The SBS spinning solution in the second step also comprises LiCl, wherein the SBS concentration is 5-20 wt%, preferably 8-15 wt%, and more preferably 9 wt%; the LiCl concentration is preferably 0.001 to 0.009 wt%, preferably 0.002 to 0.006 wt%, and more preferably 0.004 wt%.
In the electrostatic spinning process, the voltage is 20-30kV, the advancing speed is 0.3-0.6mm/min, the receiving distance is 10-15cm, the spinning time is 50-80min, the preferred voltage is 25kV, the advancing speed is 0.5mm/min, the receiving distance is 10cm, and the spinning time is 70 min.
In the third step, the dopamine hydrochloride acid solution is obtained by dispersing dopamine hydrochloride in a Tris solution, and the concentration of the dopamine hydrochloride is 0.01-6.0g/L, preferably 0.05-4.0 g/L, and further preferably 1.0 g/L; the impregnation time is 2-8h, preferably 4 h.
In the fourth step, the solvent of the silica dispersion is absolute ethyl alcohol, and preferably the silica is hydrophobic silica, and preferably the silica concentration in the silica dispersion is 0.01 wt% to 10.0 wt%, more preferably 0.5 wt% to 4.0 wt%, and still more preferably 2.0 wt%.
The waterproof moisture-permeable film obtained by the invention has good windproof and water-repellent properties and good air and moisture permeability, can be used for clothing articles such as T-shirts, outdoor clothing and the like, and can also be used in various fields such as shoes, hats, medical supplies and the like. When the fabric of the waterproof moisture-permeable film is made into clothes or wearing articles, the fabric not only can play a role in wind prevention and water repellency, but also can promote the discharge of moisture in the clothes or wearing articles, and can adjust the humidity and temperature in the clothes to increase the wearing comfort.
The waterproof moisture permeable fabric provided by the invention has the advantages that the SBS fiber layer/polydopamine layer/silicon dioxide layer multilayer structure is arranged on the surface of the fabric, and the multilayer structure is matched for use, so that the fabric with waterproof moisture permeable performance is obtained. The SBS material has good waterproof performance and mechanical property, the SBS material is manufactured into a fiber layer which is matched with a fabric substrate for use, the waterproof performance of the fabric can be improved, meanwhile, the touch feeling of the fabric can be adjusted, the surface elasticity of the fabric is increased, the wrinkle resistance of the fabric is improved, the moisture permeability and the skin-friendly performance of the fabric can be improved by the poly-dopamine layer, perspiration is promoted, the internal temperature adjustment of the fabric is realized, in addition, the adhesion between the silicon dioxide layer and the SBS fiber layer can be promoted by the poly-dopamine layer, and the adhesion between interlayer structures is improved; the hydrophobic silica improves the water repellency and the rain resistance of the fabric, and can also improve the antifouling property of the fabric; according to the invention, the waterproof and moisture permeable fabric is formed by the combined action of the three layers through the arrangement of the multilayer structure.
Drawings
FIG. 1: EXAMPLE 1 Electron microscopy of waterproof moisture-permeable film
FIG. 2: EXAMPLE 4 Electron microscopy of waterproof moisture-permeable film
Detailed Description
Example 1
1. Preparation of SBS fiber layer
Preparing N, N-Dimethylformamide (DMF) and Tetrahydrofuran (THF) according to a mass ratio of 1:3, preparing 91g of mixed solution, weighing 9g of SBS, adding the SBS into the mixed solution, stirring for 4h to form dispersion liquid, adding 0.004g of LiCl into the dispersion liquid, and stirring and dispersing for 30min to obtain the SBS spinning solution. Spinning the SBS spinning solution by using terylene as a substrate and an electrostatic spinning method under the spinning condition of voltage 25kV, the propelling speed of 0.5mm/min, the receiving distance of 10cm and the spinning time of 70min to obtain the SBS fiber membrane.
2. Preparing a polydopamine membrane: 0.2g of dopamine hydrochloride is weighed and dissolved in 100mL of Tris solution, and the solution is stirred and dispersed for 20min to obtain the dopamine hydrochloride solution with the concentration of 2.0 g/L. Soaking the SBS fiber membrane in a dopamine hydrochloride solution for 4 hours, taking out the SBS fiber membrane, and airing until no water drops drop, thereby obtaining the pretreated polydopamine membrane for later use.
3. Preparation of SiO layer2Preparing an ethanol solution: 2g of SiO are taken2(hydrophobic gas phase nano silicon dioxide, 7-40nm) is dispersed in 98g of ethanol, stirred first and then treated with ultrasound for 10 min. So as to obtain the silicon dioxide ethanol solution with the mass fraction of 2.0%. And (3) spraying the prepared silicon dioxide ethanol solution on the surface of the pretreated polydopamine membrane by using an electric spraying kettle for 15s, and performing vacuum drying at 50 ℃ for 12h to obtain the waterproof moisture-permeable membrane.
Example 2
The same as in example 1 except that 0.05g of dopamine hydrochloride was added.
Example 3
The same as in example 1 except that 0.1g of dopamine hydrochloride was added.
Example 4
The same as in example 1 except that 0.4g of dopamine hydrochloride was added.
Example 5
The same as in example 1 except that the amount of silica added was 0.5 g.
Example 6
The same as in example 1 except that the amount of silica added was 1.0 g.
Example 7
The same as in example 1 except that the amount of silica added was 4.0 g.
Comparative example 1
Same as example 1 except that polydopamine film was not included.
Comparative example 2
The same as in example 1 except that the silica layer was not included.
Comparative example 3
The same as in example 1 except that the DA layer and the silica layer were not included.
Table 1 examples and comparative examples comparison of added raw materials
Figure BDA0002550019270000051
The result of the detection
Detection of the waterproof moisture-permeable film of the invention
And (3) detecting the aperture: analysis was performed by scanning electron microscopy bench top (SEM, JSM-IT300, JEOL Ltd.).
And (3) contact angle detection: contact Angle goniometer DSA100 measures the Water Contact Angle (WCA) of the fiber film.
And (3) hydrostatic pressure detection: based on AATCC 127 standard, tests were performed using a hydrostatic tester model YG825E (nantong macroda laboratory instruments ltd, china).
And (3) detecting air permeability: the test was carried out according to ASTM D737 using a gas permeability tester (YG 461E/II, Ningbo textile instruments Co., Ltd., China).
Moisture permeability detection: the test was carried out with a water vapor transmission rate tester (YG601H-II, Ningbo textile instruments Co., Ltd., China) according to ASTM E96 standard
TABLE 2 comparison of the test results of the examples and comparative examples
Figure BDA0002550019270000061
As can be seen from Table 2, the pore diameter of the membrane on the surface of the fabric obtained by the treatment of the invention is distributed between 0.2 and 0.6 μm, and the detection results show that the water contact angle of the surface of the fabric is large, the hydrostatic pressure is high, the surface fabric has good water repellency, and the detection results of air permeability and moisture permeability show that the fabric obtained by the treatment of the invention has good waterproof and moisture permeability. And the SBS spinning layer, the polydopamine layer and the silicon dioxide layer act together to improve the waterproof and moisture-permeable performance of the surface of the fabric.

Claims (9)

1. A waterproof moisture-permeable film characterized in that: the composite material sequentially comprises a substrate, an SBS fiber layer, a polydopamine layer and a silicon dioxide layer.
2. The waterproof moisture-permeable film according to claim 1, wherein the substrate is a blended material of one or more of fabrics, cotton, hemp, wool, polyester, terylene and acrylic.
3. The waterproof moisture-permeable film according to claim 1, characterized in that: the SBS fiber layer is obtained by performing electrostatic spinning on SBS spinning solution on the surface of a substrate.
4. The waterproof moisture-permeable film according to claim 1, wherein the silica layer is hydrophobic silica.
5. A method for preparing the waterproof moisture-permeable film according to any one of claims 1 to 4, characterized in that: step one, preparing a base material; preparing an SBS fiber layer, namely preparing an SBS spinning solution, and forming the SBS fiber layer on the surface of the base material by an electrostatic spinning method; step three, preparing a polydopamine layer, preparing a dopamine hydrochloride solution, soaking the base material containing the SBS fiber layer obtained in the step two in the dopamine hydrochloride solution for a period of time, taking out and airing; and step four, preparing a silicon dioxide layer, preparing a silicon dioxide dispersion liquid, spraying the silicon dioxide dispersion liquid on the surface of the base material containing the poly dopamine layer prepared in the step three, and drying to obtain the poly dopamine layer.
6. The method for preparing a waterproof moisture-permeable film according to claim 5, wherein the SBS spinning solution in the second step further comprises LiCl, the solvent of the spinning solution is a mixed solution of N, N-Dimethylformamide (DMF) and Tetrahydrofuran (THF), the concentration of SBS in the spinning solution is 5-20 wt%, and the concentration of LiCl in the spinning solution is 0.001-0.009 wt%.
7. A method for preparing the waterproof moisture-permeable film according to claim 5, characterized in that: in the third step, the concentration of the dopamine hydrochloride solution is 0.01-6.0g/L, and the dipping time is 2-8 h.
8. A method for preparing the waterproof moisture-permeable film according to claim 5, characterized in that: in the fourth step, the silicon dioxide is hydrophobic silicon dioxide, and the concentration of the silicon dioxide in the silicon dioxide dispersion liquid is 0.01 wt% -10.0 wt%.
9. Use of the waterproof moisture-permeable film according to any one of claims 1 to 4 for the production of clothing, sweaters, footwear, medical supplies and the like.
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