CN116019272A - Degradable protective clothing and manufacturing method thereof - Google Patents

Degradable protective clothing and manufacturing method thereof Download PDF

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Publication number
CN116019272A
CN116019272A CN202310106246.6A CN202310106246A CN116019272A CN 116019272 A CN116019272 A CN 116019272A CN 202310106246 A CN202310106246 A CN 202310106246A CN 116019272 A CN116019272 A CN 116019272A
Authority
CN
China
Prior art keywords
polylactic acid
polycaprolactone
polyvinyl alcohol
degradable protective
parts
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
CN202310106246.6A
Other languages
Chinese (zh)
Inventor
刘芳丽
张会
刘文娟
颜元菊
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hubei Zhuole Medical Supplies Co ltd
Original Assignee
Hubei Zhuole Medical Supplies Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hubei Zhuole Medical Supplies Co ltd filed Critical Hubei Zhuole Medical Supplies Co ltd
Priority to CN202310106246.6A priority Critical patent/CN116019272A/en
Publication of CN116019272A publication Critical patent/CN116019272A/en
Priority to CN202310587585.0A priority patent/CN116636667A/en
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • 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
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D13/00—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches
    • A41D13/12—Surgeons' or patients' gowns or dresses
    • A41D13/1209—Surgeons' gowns or dresses
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D31/00—Materials specially adapted for outerwear
    • A41D31/02—Layered materials
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D31/00—Materials specially adapted for outerwear
    • A41D31/04—Materials specially adapted for outerwear characterised by special function or use
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D31/00—Materials specially adapted for outerwear
    • A41D31/04—Materials specially adapted for outerwear characterised by special function or use
    • A41D31/14—Air permeable, i.e. capable of being penetrated by gases
    • A41D31/145—Air permeable, i.e. capable of being penetrated by gases using layered materials
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D31/00—Materials specially adapted for outerwear
    • A41D31/04—Materials specially adapted for outerwear characterised by special function or use
    • A41D31/18—Elastic
    • A41D31/185—Elastic using layered materials
    • 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
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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
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B38/16—Drying; Softening; Cleaning
    • B32B38/164—Drying
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    • 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
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    • 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
    • B32B5/265—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 characterised by one fibrous or filamentary layer being a non-woven fabric layer
    • B32B5/266—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 characterised by one fibrous or filamentary layer being a non-woven fabric layer next to one or more non-woven fabric layers
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    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/0007—Electro-spinning
    • D01D5/0015—Electro-spinning characterised by the initial state of the material
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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
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    • D01D5/0076—Electro-spinning characterised by the electro-spinning apparatus characterised by the collecting device, e.g. drum, wheel, endless belt, plate or grid
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    • 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
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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
    • D01F6/88—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polycondensation products as major constituent with other polymers or low-molecular-weight compounds
    • D01F6/92—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polycondensation products as major constituent with other polymers or low-molecular-weight compounds of polyesters
    • 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
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    • D04H1/435—Polyesters
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
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    • 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
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    • 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
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    • D04H1/43838—Ultrafine fibres, e.g. microfibres
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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
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    • 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
    • D06M11/73—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 carbon or compounds thereof
    • D06M11/74—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 carbon or compounds thereof with carbon or graphite; with carbides; with graphitic acids or their salts
    • 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
    • D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
    • D06M13/08—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with halogenated hydrocarbons
    • 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
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    • D06M15/507—Polyesters
    • 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
    • D06N3/0002—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate
    • D06N3/0011—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate using non-woven fabrics
    • 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
    • D06N3/12—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins
    • D06N3/121—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with polyesters, polycarbonates, alkyds
    • D06N3/123—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with polyesters, polycarbonates, alkyds with polyesters
    • A—HUMAN NECESSITIES
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W90/00—Enabling technologies or technologies with a potential or indirect contribution to greenhouse gas [GHG] emissions mitigation
    • Y02W90/10—Bio-packaging, e.g. packing containers made from renewable resources or bio-plastics

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Abstract

The application relates to the field of medical protection articles, and particularly discloses a degradable protective garment and a manufacturing method thereof. The degradable protective clothing sequentially comprises a polylactic acid nanofiber membrane, a polycaprolactone fiber membrane and a polyvinyl alcohol spunlaced non-woven fabric from inside to outside; the polylactic acid nanofiber membrane comprises the following raw materials in parts by weight: 7-9 parts of polylactic acid, 2-4 parts of heat conducting filler, 1-3 parts of graphene aerogel and 1-3 parts of polycaprolactone. The degradable protective clothing has the advantages of heat conduction performance, good heat dissipation effect, good air permeability and moisture permeability, difficult thermal fatigue of a wearer and high mechanical strength.

Description

Degradable protective clothing and manufacturing method thereof
Technical Field
The application relates to the technical field of medical protective articles, in particular to a degradable protective garment and a manufacturing method thereof.
Background
In recent years, the destruction of human beings to the nature has been aggravated, and various bacteria and viruses have spread, and in the case of highly contagious coronavirus pandemics, the spread of droplets and aerosols has constituted a great threat to medical staff. The disposable medical protective garment forms a good barrier to eliminate or reduce direct contact and spray contact between the patient and medical personnel, thereby preventing the transmission of pathogens.
At present, the main materials of the disposable protective clothing on the market are polyethylene and polypropylene, and the main treatment method is to burn or landfill the disposable protective clothing together with household garbage due to nondegradability, so that not only is the land resource wasted, but also the air and water resources are seriously polluted due to poor treatment.
In the prior art, the Chinese patent application document with the application number of CN2021114808907 discloses a disposable full-biodegradable material for protective clothing, which comprises the following substances in parts by weight: 28.5-71.5 parts of PBAT, 25-50 parts of modified calcium carbonate, 0-10 parts of PLA, 0-10 parts of PPCU, 0.1-1.0 parts of dispersing agent, 0.2-0.5 parts of composite cross-linking agent and 0.2-0.5 parts of composite antioxidant. The disposable protective clothing can be completely degraded, and is environment-friendly.
In view of the above-mentioned related art, the inventor found that the degradable disposable protective clothing fabric has small pores and large liquid resistance, so that when medical staff sweats, the transportation of hot water vapor is poor, resulting in heat load, long-time wearing, heat loss and generation failing to reach balance, heat in the body failing to be normally dissipated, resulting in thermal fatigue, and strong stuffy feel under high-strength work, thereby causing discomfort to the body.
Disclosure of Invention
In order to enable the degradable disposable protective clothing to have high heat conductivity and high moisture permeability and air permeability and prevent medical staff from generating thermal fatigue, the application provides the degradable protective clothing and the manufacturing method thereof.
In a first aspect, the present application provides a degradable protective garment, which adopts the following technical scheme:
the degradable protective clothing sequentially comprises a polylactic acid nanofiber membrane, a polycaprolactone fiber membrane and a polyvinyl alcohol spunlaced non-woven fabric from inside to outside;
the polylactic acid nanofiber membrane comprises the following raw materials in parts by weight: 7-9 parts of polylactic acid, 2-4 parts of heat conducting filler, 1-3 parts of graphene aerogel and 1-3 parts of polycaprolactone.
By adopting the technical scheme, as the polyvinyl alcohol spunlaced non-woven fabric is prepared from the polyvinyl alcohol fibers through processes such as needling, and due to the existence of an amorphous area, the polyvinyl alcohol spunlaced non-woven fabric has certain moisture permeability, and the polyvinyl alcohol spunlaced non-woven fabric is adopted as an outermost layer and an innermost layer, so that the polyvinyl alcohol spunlaced non-woven fabric has water solubility and biodegradability, and polycaprolactone is a biodegradable polymer material, has good biocompatibility, flexibility and temperature sensitivity, and can obviously improve skin comfort; the polylactic acid nanofiber membrane is made of polylactic acid, polycaprolactone and other raw materials, the polylactic acid has good biocompatibility and degradability, the polylactic acid is made of starch provided by renewable plant resources, the polylactic acid nanofiber membrane can be degraded into water and carbon dioxide under the combined action of water, bacteria and microorganisms, natural green pollution-free performance is achieved, but the brittleness is too large, and the mechanical strength is poor, so that the polylactic acid nanofiber membrane is blended and modified with the polycaprolactone, the polycaprolactone is a synthetic biodegradable and bioabsorbable polymer material, the polylactic acid nanofiber membrane has excellent tensile property, biocompatibility and thermal stability, the compatibility with the polylactic acid is good, the polylactic acid nanofiber membrane and the polylactic acid nanofiber membrane are compounded and used, the mechanical property of the protective clothing can be remarkably improved, graphene aerogel and a heat conducting filler are added to the fiber surface formed by compounding the polylactic acid and the polycaprolactone, and a heat conducting frame is constructed inside the fiber membrane, so that the protective clothing has an effect of being communicated with each other, when a wearer sweats, heat is rapidly dissipated, the comfort of the protective clothing is kept, and the addition of the graphene aerogel and the heat conducting filler is easy to increase the surface roughness of the fiber membrane, the graphene aerogel is easy to increase the surface roughness of the fiber membrane, and the heat permeability of the graphene aerogel is better, and the air permeability is easier to produce a porous, so that the three-dimensional sweat-permeable and the protective clothing is more comfortable, and has a better air permeability and air permeability, and a better air permeability and air permeability.
Optionally, the heat-conducting filler comprises hexagonal boron nitride nano-sheets and carbon nano-tubes in a mass ratio of 1:0.2-0.4.
Through adopting above-mentioned technical scheme, hexagonal boron nitride nanosheets have stable chemical properties, high Gao Rexing, heat resistance and lubricity, it can overlap joint each other in polylactic acid nanofiber, make the adhesion point between the fibre reduce, fibrous structure bulk degree increase, the aperture increases, the hole and pore canal that increase do benefit to the passage of air current more, thereby make gas permeability and moisture permeability improve, make the comfort of wearing of protective clothing promote, and the addition of hexagonal boron nitride nanosheets can also make polylactic acid nanofiber membrane surface roughness increase, improve polylactic acid nanofiber membrane's hydrophobicity, the carbon nanotube has high thermal conductivity, can form the heat conduction network in polylactic acid nanofiber, improve the radiating effect of protective clothing.
Optionally, the heat conductive filler is pretreated:
adding polyvinyl alcohol into distilled water, heating to 90-95 ℃, preparing polyvinyl alcohol aqueous solution with the concentration of 3.5-4wt%, cooling to 50-55 ℃, adding acetone under stirring, adding heat conducting filler after uniformly mixing, standing for 24-26h, filtering, sequentially soaking the heat conducting filler in acetone, ethanol and methanol for 12-14h each time, and drying under reduced pressure at normal temperature, wherein the volume ratio of the acetone to the polyvinyl alcohol aqueous solution is 3:4-5.
By adopting the technical scheme, the heat conducting filler is not good in interfacial force with polylactic acid and polycaprolactone, poor in compatibility, so that the heat conducting filler is unevenly dispersed in the polylactic acid and the polycaprolactone, and is easy to cause poor mechanical property of the polylactic acid nanofiber membrane, so that the compatibility of the polyvinyl alcohol and the polylactic acid is good, the heat conducting filler is pretreated by using acetone and the polyvinyl alcohol, the compatibility of the heat conducting filler and the polylactic acid can be improved, the heat conducting filler is not easy to agglomerate, the mechanical property of the polylactic acid nanofiber membrane is improved, and acetone is used as a poor solvent to induce phase separation to prepare metastable polyvinyl alcohol solution capable of forming a porous structure, the heat conducting filler is immersed in a metastable solution system, and the porous structure is formed on the surface of the heat conducting filler through standing, displacement and drying, so that the heat conducting filler with the porous polyvinyl alcohol is prepared, and the heat conducting filler is added into the polylactic acid nanofiber membrane, so that the porosity of the nanofiber membrane can be increased, and the air permeability is improved.
Optionally, the preparation method of the graphene aerogel comprises the following steps: and (3) removing the colloid of the carbon fiber by using acetone, carboxylating, mixing with paraffin and graphene oxide aerogel, heating to 80-85 ℃, heating to 160-170 ℃ after vacuum impregnation, preserving heat for 20-24 hours, cooling to room temperature, and freeze-drying, wherein the mass ratio of the carbon fiber to the paraffin to the graphene oxide aerogel is 0.1-0.12:8-9:1.
According to the technical scheme, the adhesive layer on the surface of the carbon fiber is removed by using acetone, the binding force between the carbon fiber and graphene is increased, the surface of the carbon fiber is carboxylated by concentrated nitric acid, the carbon fiber with surface activity is obtained, the graphene oxide aerogel is porous, the pores are uniformly distributed, the porosity is higher, the graphene sheets are crosslinked into a three-dimensional interconnection reticular structure, paraffin and the graphene aerogel have good compatibility, because the graphene aerogel has good hydrophobicity and lipophilicity, one part of paraffin is filled in the pores of the graphene oxide aerogel, the other part of paraffin is attached on the graphene sheet layer of the graphene oxide aerogel, the graphene is tightly contacted with the graphene sheet layer, the paraffin is used as a heat conducting framework, the paraffin is used as a phase change material, the carbon fiber is mutually overlapped in the graphene aerogel, the pore diameter in the graphene aerogel is reduced, the graphene aerogel has good paraffin coating property, the graphene is difficult to leak, the graphene is dispersed and coated on the surface of the carbon fiber, the graphene aerogel is in the pore structure, and the carbon fiber plays a supporting role in the graphene aerogel, and the strength and the heat conductivity are further enhanced.
Optionally, an elastic layer is connected to one side of the polyvinyl alcohol spunlaced nonwoven fabric far away from the polycaprolactone fiber film, and the elastic layer comprises BTPE elastomer, 1H, 2H-perfluoro-1-decene and activated carbon in a mass ratio of 1:0.01-0.1:0.06-0.15.
By adopting the technical scheme, the BTPE is a biodegradable thermoplastic elastomer prepared from crystalline aliphatic saturated polyester prepolymer and amorphous aliphatic saturated polyester prepolymer block by adopting hot melt polycondensation and chain extension reaction, has the characteristics of wider application range, low hardness, high elasticity and the like, has the weight loss rate of more than 57 percent after being degraded for 120 days under the natural soil environment condition, and can form an elastic layer on polyvinyl alcohol water-jet non-woven fabric together with activated carbon and 1H, 2H-perfluoro-1-decene, so that the hydrophobicity and tearing resistance of protective clothing can be improved, and the activated carbon particles can transfer human body heat, disperse sweat on skin and adsorb chemical substances, thereby providing a protective effect.
In a second aspect, the present application provides a method for manufacturing a degradable protective garment, which adopts the following technical scheme:
a manufacturing method of a degradable protective garment comprises the following steps:
adding polycaprolactone into a solvent, uniformly stirring to prepare a spinning solution with the concentration of 20-23wt%, taking polyvinyl alcohol spunlaced non-woven fabric as base cloth, carrying out electrostatic spinning, forming a polycaprolactone fiber film on the polyvinyl alcohol spunlaced non-woven fabric, and preparing a surface layer;
drying polylactic acid and polycaprolactone at 50-60 ℃ for 12-16 hours, then adding a solvent, preparing a mixed solution with the concentration of 10-12wt%, adding a heat conducting filler and graphene aerogel, uniformly mixing to obtain a mixed spinning solution, and forming a polylactic acid nanofiber membrane on a polycaprolactone fiber membrane by taking the surface layer as a base cloth and carrying out electrostatic spinning to obtain a protective fabric;
and cutting and sewing the protective fabric, and installing a zipper and a closing-in to obtain the degradable protective clothing.
Through adopting above-mentioned technical scheme, dissolve the back with polycaprolactone through the electrostatic spinning, on polyvinyl alcohol water thorn non-woven fabrics, make polycaprolactone fiber membrane, then regard polyvinyl alcohol water thorn non-woven fabrics and polycaprolactone fiber membrane as the basement, on the polycaprolactone fiber membrane, through electrostatic spinning formation polylactic acid nanofiber membrane, polylactic acid nanofiber membrane has the continuous heat conduction frame that runs through in, and it is ventilative to pass through moisture, can not cause the burden to the environment, has better travelling comfort.
Optionally, dissolving BTPE elastomer in cyclohexanone to obtain 18-20wt% solution, adding active carbon and 1H, 2H-perfluoro-1-decene, stirring, coating on one side of polyvinyl alcohol spunlaced nonwoven fabric far away from polycaprolactone fiber film, drying at 80-90deg.C, and ultraviolet crosslinking for 0.5-1 hr.
Through adopting above-mentioned technical scheme, after ultraviolet irradiation, the C=C group fracture on the BTPE elastomer, with the oxygen atom in the air has generated polar group such as-C=O to take place the crosslinking reaction, form the elastic layer that adhesion is stronger, and elasticity is higher on polyvinyl alcohol water thorn non-woven fabrics, with the tear resistance that improves protective clothing, in addition, the hydrophobicity of elastic layer can be improved to 1H, 2H-perfluoro-1-decene that contains in the elastic layer, promote the surface water resistance of protective clothing, in addition active carbon can increase the filtration efficiency of protective clothing, improve ventilative and moisture permeability.
Optionally, the electrostatic spinning parameters of the polycaprolactone fiber film are as follows: the positive voltage is 26-30kv, the negative voltage is 1.5-1.7kv, the flow rate of the spinning solution is 0.06-0.08mm/min, the receiving distance is 18-20cm, and the spinning time is 10-12min.
By adopting the technical scheme, the polycaprolactone fiber film with uniform thickness can be formed on the polyvinyl alcohol spunlaced non-woven fabric, so that the stress of the protective clothing is improved.
Optionally, the electrostatic spinning parameters of the polylactic acid nanofiber membrane are as follows: the positive voltage is 25-28kv, the negative voltage is 1.5-1.7kv, the flow rate of the mixed spinning solution is 0.07-0.1mm/min, the receiving distance is 18-20cm, and the spinning time is 2.5-3h.
Optionally, the solvent comprises chloroform and DMF in a mass ratio of 7-9:1-3.
In summary, the present application has the following beneficial effects:
1. because this application adopts the polyvinyl alcohol water thorn non-woven fabrics that has the water solubility to regard as the intermediate level with polycaprolactone fiber membrane, regard as the inlayer with polylactic acid nanofiber membrane and skin contact, the three-layer all has green degradability, can not cause the burden to the environment, has added graphene aerogel and heat conduction filler in the polylactic acid nanofiber membrane in addition, forms the heat conduction frame in it, dissipates the health heat through heat conduction, in order to keep the travelling comfort of protective clothing, but also can pass through moisture and breathe freely, protection is filtered, water-fast infiltration.
2. In the application, the polyvinyl alcohol and the acetone are preferably adopted to pretreat the heat-conducting filler, and the polyvinyl alcohol with a porous structure is formed on the heat-conducting filler, so that the compatibility of the heat-conducting filler and the polylactic acid is improved, the dispersibility of the heat-conducting filler is improved, the mechanical strength of the polylactic acid nanofiber membrane is improved, the heat-conducting filler with the porous structure on the surface is adopted, the air permeability of the polylactic acid nanofiber membrane is increased, and the air permeability and the moisture permeability of the protective clothing are further improved.
3. In the present application, it is preferable to coat a mixed solution of BTPE, activated carbon, 1h,2 h-perfluoro-1-decene, etc. on a polyvinyl alcohol spunlaced nonwoven fabric, and form an elastic layer on the polyvinyl alcohol spunlaced nonwoven fabric, thereby improving the moisture resistance of the surface of the protective garment and preventing moisture or blood permeation.
Description of the embodiments
Preparation example 1: adding the carbon fiber into acetone, soaking for 30min, washing, adding concentrated nitric acid for carboxylation, filtering, washing, drying, mixing with paraffin and graphene oxide aerogel, heating to 80 ℃, heating to 160 ℃ after vacuum soaking, preserving heat for 24h, cooling to room temperature, and freeze-drying, wherein the mass ratio of the carbon fiber to the paraffin to the graphene oxide aerogel is 0.12:8:1.
Preparation example 2: adding the carbon fiber into acetone, soaking for 30min, washing, adding concentrated nitric acid for carboxylation, filtering, washing, drying, mixing with paraffin and graphene oxide aerogel, heating to 85 ℃, heating to 170 ℃ after vacuum soaking, preserving heat for 20h, cooling to room temperature, and freeze-drying, wherein the mass ratio of the carbon fiber to the paraffin to the graphene oxide aerogel is 0.1:9:1.
Preparation example 3: mixing paraffin and graphene oxide aerogel, heating to 85 ℃, and freeze-drying after vacuum impregnation, wherein the mass ratio of the paraffin to the graphene oxide aerogel is 9:1.
Preparation example 4: adding the carbon fiber into acetone, soaking for 30min, washing, adding concentrated nitric acid for carboxylation, filtering, washing, drying, mixing with graphene oxide aerogel, heating to 160 ℃ after vacuum soaking, preserving heat for 24h, cooling to room temperature, and freeze-drying, wherein the mass ratio of the carbon fiber to the graphene oxide aerogel is 0.12:1.
Examples
Example 1: the degradable protective clothing sequentially comprises a polylactic acid nanofiber membrane, a polycaprolactone fiber membrane and a polyvinyl alcohol spunlaced non-woven fabric from inside to outside, wherein the specification of the polyvinyl alcohol spunlaced non-woven fabric is 30g/m < 2 >, the raw materials of the polylactic acid nanofiber membrane comprise 9kg of polylactic acid, 4kg of heat conducting filler, 3kg of graphene aerogel and 1kg of polycaprolactone, the polylactic acid is selected from the family of Yingkea, the average molecular weight is 15 ten thousand, the polycaprolactone is selected from the family of Hai-si plastics, the average molecular weight is 5 ten thousand, the graphene aerogel is prepared from preparation example 1, and the heat conducting filler comprises hexagonal boron nitride nanosheets and carbon nanotubes with the mass ratio of 1:0.4.
The manufacturing method of the degradable protective clothing comprises the following steps:
s1, adding polycaprolactone into a solvent, stirring uniformly to prepare a spinning solution with the concentration of 23wt%, taking polyvinyl alcohol spunlaced non-woven fabric as base cloth, carrying out electrostatic spinning, forming a polycaprolactone fiber film on the polyvinyl alcohol spunlaced non-woven fabric to prepare a surface layer, wherein the polycaprolactone is selected from Haisserial plastics, the average molecular weight is 5 ten thousand, the solvent comprises chloroform and DMF with the mass ratio of 7:3, and the electrostatic spinning parameters are as follows: the positive voltage is 26kv, the negative voltage is 1.5kv, the flow rate of the spinning solution is 0.06mm/min, the receiving distance is 18cm, and the spinning time is 10min;
s2, drying polylactic acid and polycaprolactone at 60 ℃ for 12 hours, adding a solvent, preparing a mixed solution with the concentration of 12wt%, adding a heat conducting filler and graphene aerogel, uniformly mixing to obtain a mixed spinning solution, and performing electrostatic spinning on the surface layer prepared in the S1 to form a polylactic acid nanofiber membrane on the polycaprolactone fiber membrane to obtain a protective fabric;
s3, cutting and sewing the protective fabric, installing a zipper and closing up to obtain the degradable protective clothing, wherein the solvent comprises chloroform and DMF in a mass ratio of 7:3, and electrostatic spinning parameters are as follows: the positive voltage is 25kv, the negative voltage is 1.5kv, the flow rate of the mixed spinning solution is 0.07mm/min, the receiving distance is 18cm, and the spinning time is 2.5h;
example 2: a degradable protective garment sequentially comprises a polyvinyl alcohol spunlaced non-woven fabric, a polycaprolactone fiber film, a polylactic acid nanofiber film, a polycaprolactone fiber film and a polyvinyl alcohol spunlaced non-woven fabric, wherein the specification of the polyvinyl alcohol spunlaced non-woven fabric is 30g/m 2 The raw materials of the polylactic acid nanofiber membrane comprise 7kg of polylactic acid, 2kg of heat conducting filler and 1kg of graphene gasGel and 3kg polycaprolactone, and graphene aerogel is prepared from preparation example 2, wherein the heat-conducting filler comprises hexagonal boron nitride nano-sheets and carbon nano-tubes in a mass ratio of 1:0.2.
The manufacturing method of the degradable protective clothing comprises the following steps:
s1, adding polycaprolactone into a solvent, stirring uniformly to prepare a spinning solution with the concentration of 20wt%, taking polyvinyl alcohol spunlaced non-woven fabric as base cloth, carrying out electrostatic spinning, forming a polycaprolactone fiber film on the polyvinyl alcohol spunlaced non-woven fabric to prepare a surface layer, wherein the polycaprolactone is selected from Haisserial plastics, the average molecular weight is 5 ten thousand, the solvent comprises chloroform and DMF with the mass ratio of 9:1, and the electrostatic spinning parameters are as follows: the positive voltage is 30kv, the negative voltage is 1.7kv, the flow rate of the spinning solution is 0.08mm/min, the receiving distance is 20cm, and the spinning time is 12min;
s2, drying polylactic acid and polycaprolactone at 50 ℃ for 16 hours, adding a solvent, preparing a mixed solution with the concentration of 10wt%, adding a heat conducting filler and graphene aerogel, uniformly mixing to obtain a mixed spinning solution, and forming a polylactic acid nanofiber membrane on the polycaprolactone fiber membrane by taking the surface layer prepared in the S1 as a base cloth for electrostatic spinning to obtain the protective fabric;
s3, cutting and sewing the protective fabric, installing a zipper and closing up to obtain the degradable protective clothing, wherein the solvent comprises chloroform and DMF in a mass ratio of 9:1, and electrostatic spinning parameters are as follows: the positive voltage is 28kv, the negative voltage is 1.7kv, the flow rate of the mixed spinning solution is 0.1mm/min, the receiving distance is 20cm, and the spinning time is 3h;
example 3: a degradable protective garment differs from example 1 in that graphene aerogel was made from preparation example 3.
Example 4: a degradable protective garment differs from example 1 in that graphene aerogel was made from preparation example 4.
Example 5: a degradable protective garment is different from the degradable protective garment in that the heat conducting filler is carbon nano tube and hexagonal boron nitride nano sheets are not added.
Example 6: a degradable protective garment differing from example 1 in that the heat conductive filler is pretreated by: adding polyvinyl alcohol into distilled water, heating to 95 ℃, preparing a polyvinyl alcohol aqueous solution with the concentration of 4wt%, cooling to 55 ℃, adding acetone under stirring, adding a heat-conducting filler after uniform mixing, standing for 26 hours, filtering, sequentially soaking the heat-conducting filler in acetone, ethanol and methanol for 12 hours each time, and drying under normal temperature and reduced pressure, wherein the volume ratio of the acetone to the polyvinyl alcohol aqueous solution is 3:4.
Example 7: a degradable protective garment is different from example 6 in that an elastic layer is connected to one side of the polyvinyl alcohol spunlaced nonwoven fabrics at two sides of the polylactic acid nanofiber membrane, which is far away from the polycaprolactone fiber membrane, and the elastic layer comprises BTPE elastomer, 1H, 2H-perfluoro-1-decene and active carbon in a mass ratio of 1:0.1:0.15; the preparation method of the degradable protective clothing comprises the following steps:
s1, adding polycaprolactone into a solvent, stirring uniformly to prepare a spinning solution with the concentration of 23wt%, taking polyvinyl alcohol spunlaced non-woven fabric as base cloth, carrying out electrostatic spinning, forming a polycaprolactone fiber film on the polyvinyl alcohol spunlaced non-woven fabric to prepare a surface layer, wherein the polycaprolactone is selected from Haisserial plastics, the average molecular weight is 5 ten thousand, the solvent comprises chloroform and DMF with the mass ratio of 7:3, and the electrostatic spinning parameters are as follows: the positive voltage is 26kv, the negative voltage is 1.5kv, the flow rate of the spinning solution is 0.06mm/min, the receiving distance is 18cm, and the spinning time is 10min;
s2, drying polylactic acid and polycaprolactone at 60 ℃ for 12 hours, then adding a solvent, preparing a mixed solution with the concentration of 12wt%, adding a heat conducting filler and graphene aerogel, uniformly mixing to obtain a mixed spinning solution, and forming a polylactic acid nanofiber membrane on the polycaprolactone fiber membrane by taking the surface layer prepared in the S1 as a base cloth and carrying out electrostatic spinning, wherein the solvent comprises chloroform and DMF with the mass ratio of 7:3, and the electrostatic spinning parameters are as follows: the positive voltage is 25kv, the negative voltage is 1.5kv, the flow rate of the mixed spinning solution is 0.07mm/min, the receiving distance is 18cm, and the spinning time is 2.5h;
s3, dissolving the BTPE elastomer in cyclohexanone to prepare a solution with the concentration of 20wt%, adding active carbon and 1H, 2H-perfluoro-1-decene, uniformly stirring, coating one side of the polyvinyl alcohol spunlaced non-woven fabric, which is far away from a polycaprolactone fiber film, on the product obtained in the step S2, drying at 80 ℃, and then carrying out ultraviolet crosslinking for 1h to prepare the protective fabric;
s4, cutting and sewing the protective fabric, and installing a zipper and a closing-in to obtain the degradable protective clothing.
Example 8: a degradable protective garment differs from example 7 in that the elastic layer comprises BTPE elastomer, 1H, 2H-perfluoro-1-decene and activated carbon in a mass ratio of 1:0.01:0.06.
Example 9: a degradable protective garment differs from example 7 in that the elastic layer comprises a BTPE elastomer and 1H, 2H-perfluoro-1-decene in a mass ratio of 1:0.01.
Example 10: a degradable protective garment differs from example 7 in that the elastic layer comprises BTPE elastomer and activated carbon in a mass ratio of 1:0.06.
Comparative example 1: a degradable protective garment differs from example 1 in that no graphene aerogel is added.
Comparative example 2: a degradable protective garment differs from example 1 in that no thermally conductive filler is added.
Comparative example 3: a method for manufacturing degradable protective clothing, comprising the following steps: (1) Drying polylactic acid master batches, polycaprolactone master batches and polyethylene master batches; (2) Respectively feeding the dried polylactic acid master batch, polycaprolactone master batch and polyethylene master batch into a screw extruder for melt extrusion; (3) The melt is extruded from a spinning plate after being mixed according to 70 parts by weight of polylactic acid, 20 parts by weight of polycaprolactone and 10 parts by weight of polyethylene, and is drawn to a lapping machine through air flow, wherein the gram weight is controlled to be about 80 g/square meter, and the fiber diameter is controlled to be about 6 microns; (4) After the net is formed, reinforcing by a needling method to obtain non-woven fabrics; (5) And cutting and sewing the non-woven fabric according to the design specification and a conventional method to obtain the degradable protective clothing.
Protective garments were prepared according to the methods of examples and comparative examples, and the performance of the protective garments was tested with reference to the following methods, and the test results are recorded in table 1.
1. Stress: the mechanical property of the protective clothing is detected by using an electronic tension tester;
2. degradation rate: according to ISO 16929 standard, composting for 180 days, removing the zipper and the locking belt before degradation, and taking the weight loss rate as the degradation rate;
3. thermal conductivity: testing the heat conductivity coefficient of the protective clothing by using a Hot Disk TPS 2500S heat conductivity coefficient meter;
4. air and moisture permeability: detecting the moisture permeability of protective clothing by using a W3/031 water vapor permeability tester, wherein the front and back sides of each protective clothing are respectively tested for 3 positions, and taking an average value; the air permeability of the protective clothing is tested by utilizing a YG461E-III full-automatic air permeability meter, the testing pressure difference is 100Pa, the test is carried out under constant temperature and constant humidity, and the average value of 5 testing results is taken as the testing result;
5. surface moisture resistance: the detection is carried out according to GB/T19082-2009 technical requirement of medical disposable protective clothing.
TABLE 1 Performance test results of degradable protective clothing
In the embodiment 1 and the embodiment 2, hexagonal boron nitride nano-sheets and carbon nano-tubes are adopted as heat conducting fillers, polylactic acid and polycaprolactone are adopted as main materials, and the prepared protective clothing has the advantages of good biodegradation rate, good mechanical property, moisture permeability, ventilation and large heat conducting coefficient, and can prevent a wearer from generating heat stress.
In the embodiment 3, the graphene aerogel prepared in the preparation example 3 is adopted, and in the comparative example 4, the graphene aerogel prepared in the preparation example 4 is adopted, so that the air permeability and the moisture permeability of the protective clothing prepared in the embodiment 3 are increased, but the heat conductivity coefficient is reduced, and the air permeability, the moisture permeability and the stress of the protective clothing prepared in the embodiment 4 are reduced, which means that the paraffin as a phase change material can increase the heat absorption capacity of the protective clothing in a graphene sheet layer, improve the heat conduction effect, but reduce the porosity of the graphene aerogel, so that the air permeability and the moisture permeability are reduced to some extent; the carbon fiber can increase the porosity of the graphene aerogel and increase the ventilation and moisture permeability effects.
Example 5 compared to example 1, using carbon nanotubes as a thermally conductive filler, the protective garment prepared in example 5 showed a decrease in thermal conductivity, a decrease in air and moisture permeability, but an improvement in stress, demonstrating the addition of hexagonal boron nitride nanoplatelets, resulting in increased inter-nanofiber porosity, increased porosity and channels for air flow passage, and increased moisture and air permeability.
In example 6, the heat conductive filler was pretreated with polyvinyl alcohol, and compared with example 1, the protective garment prepared in example 6 has improved stress, improved moisture permeability and air permeability, which means that the pretreatment of polyvinyl alcohol improves the compatibility of the heat conductive filler with the matrix such as polylactic acid, improves the stress degree, and improves the air and moisture permeability effects.
Example 7 and example 8 compared with example 6, an elastic layer made of BTPE, activated carbon, etc. was further coated on the side of the polyvinyl alcohol spunlaced nonwoven fabric on the inner and outer sides of the protective garment away from the polycaprolactone fiber film, and it is shown in table 1 that the protective garments prepared in example 7 and example 8 are increased in stress, improved in air and moisture permeability, and improved in surface moisture resistance grade.
In example 9 and example 10, the surface moisture resistance grade of the protective garment prepared in example 9 was unchanged, the air permeability was decreased, the surface moisture resistance was decreased, the surface hydrophobicity was decreased, and the moisture permeability was decreased, as compared with example 7, without adding activated carbon and 1h,2 h-perfluoro-1-decene to the elastic layer, respectively.
The graphene aerogel is not added in comparative example 1, the heat conductive filler is not added in comparative example 2, and the heat conductivity of the protective clothing prepared in comparative examples 1 and 2 is reduced and the air and moisture permeability is reduced as compared with example 1.
Comparative example 3 is a protective garment made of polylactic acid and polycaprolactone in the prior art, which has poor thermal conductivity, insufficient air and moisture permeability, difficult discharge when the wearer sweats, and poor comfort.
The present embodiment is merely illustrative of the present application and is not intended to be limiting, and those skilled in the art, after having read the present specification, may make modifications to the present embodiment without creative contribution as required, but is protected by patent laws within the scope of the claims of the present application.

Claims (10)

1. The degradable protective clothing is characterized by sequentially comprising a polylactic acid nanofiber membrane, a polycaprolactone fiber membrane and a polyvinyl alcohol spunlaced non-woven fabric from inside to outside;
the polylactic acid nanofiber membrane comprises the following raw materials in parts by weight: 7-9 parts of polylactic acid, 2-4 parts of heat conducting filler, 1-3 parts of graphene aerogel and 1-3 parts of polycaprolactone.
2. The degradable protective garment of claim 1, wherein: the heat conduction filler comprises hexagonal boron nitride nano-sheets and carbon nano-tubes in a mass ratio of 1:0.2-0.4.
3. The degradable protective garment of claim 2, wherein the thermally conductive filler is pre-treated with:
adding polyvinyl alcohol into distilled water, heating to 90-95 ℃, preparing polyvinyl alcohol aqueous solution with the concentration of 3.5-4wt%, cooling to 50-55 ℃, adding acetone under stirring, adding heat conducting filler after uniformly mixing, standing for 24-26h, filtering, sequentially soaking the heat conducting filler in acetone, ethanol and methanol for 12-14h each time, and drying under reduced pressure at normal temperature, wherein the volume ratio of the acetone to the polyvinyl alcohol aqueous solution is 3:4-5.
4. The degradable protective garment of claim 1, wherein the graphene aerogel is prepared by a method comprising: and (3) removing the colloid of the carbon fiber by using acetone, carboxylating, mixing with paraffin and graphene oxide aerogel, heating to 80-85 ℃, heating to 160-170 ℃ after vacuum impregnation, preserving heat for 20-24 hours, cooling to room temperature, and freeze-drying, wherein the mass ratio of the carbon fiber to the paraffin to the graphene oxide aerogel is 0.1-0.12:8-9:1.
5. The degradable protective garment according to claim 1, wherein an elastic layer is connected to the polyvinyl alcohol spunlaced nonwoven fabric on a side far away from the polycaprolactone fiber film, the elastic layer comprising BTPE elastomer, 1h,2 h-perfluoro-1-decene, and activated carbon in a mass ratio of 1:0.01-0.1:0.06-0.15.
6. The method for manufacturing the degradable protective clothing according to any one of claims 1 to 5, comprising the steps of:
adding polycaprolactone into a solvent, uniformly stirring to prepare a spinning solution with the concentration of 20-23wt%, taking polyvinyl alcohol spunlaced non-woven fabric as base cloth, carrying out electrostatic spinning, forming a polycaprolactone fiber film on the polyvinyl alcohol spunlaced non-woven fabric, and preparing a surface layer;
drying polylactic acid and polycaprolactone at 50-60 ℃ for 12-16 hours, then adding a solvent, preparing a mixed solution with the concentration of 10-12wt%, adding a heat conducting filler and graphene aerogel, uniformly mixing to obtain a mixed spinning solution, and forming a polylactic acid nanofiber membrane on a polycaprolactone fiber membrane by taking the surface layer as a base cloth and carrying out electrostatic spinning to obtain a protective fabric;
and cutting and sewing the protective fabric, and installing a zipper and a closing-in to obtain the degradable protective clothing.
7. The method of making a degradable protective garment according to claim 6, further comprising the steps of: dissolving BTPE elastomer in cyclohexanone to prepare a solution with the concentration of 18-20wt%, adding active carbon and 1H, 2H-perfluoro-1-decene, uniformly stirring, coating on one side of polyvinyl alcohol spunlaced non-woven fabric far away from a polycaprolactone fiber film, drying at 80-90 ℃, and then carrying out ultraviolet crosslinking for 0.5-1h.
8. The method for manufacturing the degradable protective garment according to claim 6, wherein the electrostatic spinning parameters of the polycaprolactone fiber film are as follows: the positive voltage is 26-30kv, the negative voltage is 1.5-1.7kv, the flow rate of the spinning solution is 0.06-0.08mm/min, the receiving distance is 18-20cm, and the spinning time is 10-12min.
9. The method for manufacturing the degradable protective garment according to claim 6, wherein the electrostatic spinning parameters of the polylactic acid nanofiber membrane are as follows: the positive voltage is 25-28kv, the negative voltage is 1.5-1.7kv, the flow rate of the mixed spinning solution is 0.07-0.1mm/min, the receiving distance is 18-20cm, and the spinning time is 2.5-3h.
10. The method for manufacturing a degradable protective garment according to claim 6, wherein the solvent comprises chloroform and DMF in a mass ratio of 7-9:1-3.
CN202310106246.6A 2023-02-13 2023-02-13 Degradable protective clothing and manufacturing method thereof Withdrawn CN116019272A (en)

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Application publication date: 20230428