CN114190631B - Preparation method and application method of nanocellulose aerogel protective mask - Google Patents
Preparation method and application method of nanocellulose aerogel protective mask Download PDFInfo
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- CN114190631B CN114190631B CN202111560324.7A CN202111560324A CN114190631B CN 114190631 B CN114190631 B CN 114190631B CN 202111560324 A CN202111560324 A CN 202111560324A CN 114190631 B CN114190631 B CN 114190631B
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- aerogel
- mask
- nano cellulose
- water swelling
- cellulose aerogel
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- 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
- A41D13/05—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches protecting only a particular body part
- A41D13/11—Protective face masks, e.g. for surgical use, or for use in foul atmospheres
- A41D13/1107—Protective face masks, e.g. for surgical use, or for use in foul atmospheres characterised by their shape
- A41D13/113—Protective face masks, e.g. for surgical use, or for use in foul atmospheres characterised by their shape with a vertical fold or weld
-
- 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
- A41D31/10—Impermeable to liquids, e.g. waterproof; Liquid-repellent
- A41D31/102—Waterproof and breathable
-
- 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
- A41D31/12—Hygroscopic; Water retaining
- A41D31/125—Moisture handling or wicking function through 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
- A41D31/30—Antimicrobial, e.g. antibacterial
- A41D31/305—Antimicrobial, e.g. antibacterial using layered materials
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Physical Education & Sports Medicine (AREA)
- Respiratory Apparatuses And Protective Means (AREA)
Abstract
The invention discloses a preparation method of a nanocellulose aerogel protective mask, which comprises the following steps: s1, adhering or coating a first nano cellulose aerogel in the surface layer of a mask, and adhering or coating a first water swelling material on one side of the first nano cellulose aerogel; coating the second nanocellulose aerogel on the surface of the inner layer; the first water swelling material is capable of absorbing the exhaled gas or saline solution; s2, adhering or coating a second water swelling material on the circumference of the first nano cellulose aerogel or the second nano cellulose aerogel, wherein the second water swelling material forms a ring structure; s3, compounding the surface layer and the inner layer of the mask. The mask takes natural antibacterial fibrilia fabric as a surface layer and an inner layer, takes double-layer nano cellulose aerogel as a core layer, and forms the KN95 protective mask.
Description
Technical Field
The invention relates to the technical field of masks, in particular to a preparation method and a use method of a nanocellulose aerogel protective mask.
Background
Nanocellulose has received wide attention in recent years in the energy storage field as a novel green nanomaterial. Besides the natural advantages of abundant reserves and renewable circulation, the nanocellulose also has the advantages of fine nano structure, good mechanical strength, lower thermal expansion coefficient and the like.
The aerogel is a light inorganic solid material with a three-dimensional network skeleton structure and nano-scale holes, has extremely high porosity, specific surface area, extremely low density and solid content, chemical inertness and incombustibility, and has excellent heat insulation, fire resistance, sound insulation, shock absorption, energy absorption, transparency and other characteristics, the heat conductivity coefficient can be as low as below 0.015W/m.K, and the aerogel is one of the solid materials with the best heat insulation and heat preservation performance.
The mask in the prior art is generally a polypropylene melt-blown mask or an electrostatic spinning nanofiber mask, the degradation performance of the mask is poor, the natural antibacterial effect cannot be generated, and the filtering effect and the hydrophobic ventilation effect are poor.
Therefore, there is a need to develop a degradable biological mask with efficient filtration, natural antibacterial and hydrophobic and breathable properties using nanocellulose aerogel.
Disclosure of Invention
The invention overcomes the defects of the prior art and provides a preparation method and a use method of a nanocellulose aerogel protective mask.
In order to achieve the above purpose, the invention adopts the following technical scheme: the preparation method of the nanocellulose aerogel protective mask is characterized by comprising the following steps of:
s1, adhering or coating a first nano cellulose aerogel in the surface layer of a mask, and adhering or coating a first water swelling material on one side of the first nano cellulose aerogel; coating the second nanocellulose aerogel on the surface of the inner layer; the first water swelling material is capable of absorbing the exhaled gas or saline solution;
s2, adhering or coating a second water swelling material on the circumference of the first nano cellulose aerogel or the second nano cellulose aerogel, wherein the second water swelling material forms a ring structure;
s3, compounding the surface layer and the inner layer of the mask.
In a preferred embodiment of the present invention, in the step S1, the first nanocellulose aerogel is a hydrophilic nanocellulose aerogel, and the second nanocellulose aerogel is formed by graft polymerizing a hydrophobic acrylic monomer onto the first nanocellulose aerogel by an atom transfer radical polymerization method.
In a preferred embodiment of the present invention, the second water swelling material swells more than the first water swelling material.
In a preferred embodiment of the present invention, the first water-swellable material is symmetrically disposed along a centerline of the length of the first nanocellulose aerogel.
In a preferred embodiment of the present invention, in the step S1, the surface layer of the mask is a linen fabric, and both the surface layer and the inner layer of the linen fabric are modified by using a cationic modifier and a softener, so as to improve the softness of the linen fabric.
In a preferred embodiment of the present invention, the first water swelling material is a plurality of linear absorbent fibers or spiral absorbent fibers arranged in an array.
In a preferred embodiment of the present invention, the surface of the first water swelling material is coated with a hydrophilic coating and a hydrophobic coating at intervals.
In a preferred embodiment of the present invention, the first nanocellulose aerogel and the second nanocellulose aerogel are both microporous multi-stage pore structures.
The application method of the nanocellulose aerogel protective mask prepared by using any one of the preparation methods disclosed by the invention comprises the following steps of:
a1, bending the mask inwards along the middle area, wherein the first water swelling materials are positioned on two sides of the nose wings;
a2, after the gas exhaled by the human body passes through the second nano cellulose aerogel, moisture in the gas is absorbed by the second water swelling material within 1-2 min;
a3, forming outward bending on the first nano cellulose aerogel and the second nano cellulose aerogel, and forming a gap at the bending position, wherein the gap is formed after the first water swelling material swells; the pores on the surface of the first nano cellulose aerogel on one side close to the surface layer of the mask become smaller, and the pores on the other side of the surface of the first nano cellulose aerogel become larger; meanwhile, the pores on the surface of the first nano cellulose aerogel close to one side of the inner layer of the mask are enlarged, and the pores on the other side of the surface of the first nano cellulose aerogel are reduced, so that the air permeability of the bending part of the mask is kept unchanged;
a4, after wearing for 3-4 hours, selecting and replacing a new mask according to the expansion degree of the first water swelling material.
In a preferred embodiment of the present invention, in the A2, the second water swelling material is closely attached to the inner layer of the mask after moisture absorption and swelling, so that the edge of the inner layer is pressed toward the inner side of the mask and is attached to the skin.
The invention solves the defects existing in the background technology, and has the following beneficial effects:
the invention provides a preparation method of a nano cellulose aerogel protective mask, which takes natural antibacterial fibrilia fabric as a surface layer and an inner layer and takes double-layer nano cellulose aerogel as a core layer to form a KN95 protective mask.
According to the invention, the surface of the first water swelling material is coated with the hydrophilic coating and the hydrophobic coating at intervals, so that the first water swelling material can be bent or twisted, the gap between the first nano cellulose aerogel and the second nano cellulose aerogel after bending and using is larger, and the ventilation property of the bending part of the mask is ensured.
According to the mask, the pores on the surface of the first nano cellulose aerogel on one side close to the surface layer of the mask are smaller, and the pores on the other side of the surface of the first nano cellulose aerogel are larger; meanwhile, the pores on the surface of the first nano cellulose aerogel close to one side of the inner layer of the mask become larger, and the pores on the other side of the surface of the first nano cellulose aerogel become smaller. When the same air flow passes through the first nano cellulose aerogel and the second nano cellulose aerogel at the bending position, the air flow strength sequentially passes through the processes of increasing, decreasing, increasing and decreasing, so that the air permeability of the bending position of the mask is kept unchanged. Through add one deck first nanocellulose aerogel on the surface of second nanocellulose aerogel, after bending, the change in the inside and outside layer pore space of first nanocellulose aerogel and second nanocellulose aerogel is the same, has compensated the pore space change after single nanocellulose aerogel is bent.
The invention converts the replacement time of the mask into a visual index, and the expansion degree of the first water swelling material in the mask is easy to obtain through the observation of the mask or other people, thereby improving the replacement frequency of the mask and reducing the transmission of viruses.
According to the invention, the first nano cellulose aerogel and the second nano cellulose aerogel have different hydrophilicity and hydrophobicity, the second nano cellulose aerogel is formed by graft polymerizing a hydrophobic acrylic monomer on the first nano cellulose aerogel by adopting an atom transfer radical polymerization method so as to show hydrophobicity, the second nano cellulose aerogel is close to the face, so that the dry and comfortable wearing of the mask can be greatly ensured, and the first nano cellulose aerogel can absorb a certain amount of gas, and the moist feeling of the outer side of the mask is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art;
FIG. 1 is a flow chart of a method of making a nanocellulose aerogel protective mask in accordance with a preferred embodiment of the present invention;
fig. 2 is a flow chart of a method of using a nanocellulose aerogel protective facemask in accordance with a preferred embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1, a flowchart of a method for preparing a nanocellulose aerogel protective mask according to the present invention is shown, comprising the steps of:
s1, adhering or coating a first nano cellulose aerogel in the surface layer of a mask, and adhering or coating a first water swelling material on one side of the first nano cellulose aerogel; coating the second nanocellulose aerogel on the surface of the inner layer; the first water swelling material is capable of absorbing the exhaled gas or saline solution;
s2, adhering or coating a second water swelling material on the circumference of the first nano cellulose aerogel or the second nano cellulose aerogel, wherein the second water swelling material forms a ring structure;
s3, compounding the surface layer and the inner layer of the mask.
The preparation method of the first nanocellulose aerogel comprises the following steps: pretreating a cellulose raw material to obtain a nano cellulose dispersion liquid; mixing the nanocellulose dispersion liquid with a cross-linking agent to obtain a composite dispersion liquid; and (3) freezing the composite dispersion liquid at the freezing temperature of-1 ℃ to-150 ℃ for 10-30 hours, and the times of freezing and thawing are 5-8 times to obtain the first nanocellulose hydrogel. Wherein the cross-linking agent comprises at least one of epoxy silane, epoxy chloropropane or a silane coupling agent. The concentration of the cross-linking agent is 1% -20% (w/w). In the invention, the rebound rate of the first nanocellulose hydrogel in the aqueous solution or air reaches 99% -100%, and the compression strength reaches 1800-2000 Pa. The first nano cellulose aerogel prepared by the method has excellent mechanical properties and has the advantages of high strength and high rebound. The first nanocellulose aerogel has excellent hydrophilicity.
In the invention, the second nano-cellulose aerogel is formed by graft polymerizing a hydrophobic acrylic monomer on the first nano-cellulose aerogel by adopting an atom transfer radical polymerization method so as to show hydrophobicity.
The first nano cellulose aerogel and the second nano cellulose aerogel prepared by the method are of microporous multi-stage pore structures, and the structures enable the mask to have high-efficiency filterability and breathability.
Because of low fibrilia content, coarse and hard hand feeling, high rigidity, poor cohesion, itching feeling when being in direct contact with skin, and the fibrilia has the defects of easy yellowing, easy wrinkling, poor dyeing property and the like. According to the mask, the surface layer of the mask is made of the linen fabric, and the surface layer and the inner layer of the linen fabric are modified by the cationic modifier and the softener, so that the softness of the linen fabric is improved, and the comfort of human face contact is improved.
The second water swelling material has a swelling speed higher than that of the first water swelling material, so that the second water swelling material can swell in a short time and form a seal on the edge of the inner layer, and better tightness of the mask is ensured.
The first water swelling materials are symmetrically arranged along the central line of the length of the first nanocellulose aerogel, so that the first water swelling materials are arranged on two sides of nose wings or at the oral cavity of the face, and the positions where the first water swelling materials are adhered or coated are not breathable, and only the effect of moisture absorption and expansion is achieved.
According to the invention, the first nano cellulose aerogel and the second nano cellulose aerogel form outward bending, and a gap generated after the first water swelling material swells exists at the bending position.
The pores on the surface of the first nano cellulose aerogel on one side close to the surface layer of the mask become smaller, and the pores on the other side of the surface of the first nano cellulose aerogel become larger; meanwhile, the pores on the surface of the first nano cellulose aerogel close to one side of the inner layer of the mask become larger, and the pores on the other side of the surface of the first nano cellulose aerogel become smaller. When the same air flow passes through the first nano cellulose aerogel and the second nano cellulose aerogel at the bending position, the air flow strength sequentially passes through the processes of increasing, decreasing, increasing and decreasing, so that the air permeability of the bending position of the mask is kept unchanged. Through add one deck first nanocellulose aerogel on the surface of second nanocellulose aerogel, after bending, the change in the inside and outside layer pore space of first nanocellulose aerogel and second nanocellulose aerogel is the same, has compensated the pore space change after single nanocellulose aerogel is bent.
The first water swelling material is a plurality of linear absorbent fibers or spiral absorbent fibers which are arranged in an array. Preferably, the moisture absorption fiber in the invention can be in a sheath-core structure, and the surface layer of the moisture absorption fiber has compact texture and high moisture absorption; the polymer gel texture in the inner layer of the absorbent fiber is loose and disordered.
The surface interval coating of first water swelling material has hydrophilic coating and hydrophobic coating for first water swelling material can produce crooked or torsion, makes the clearance between first nanocellulose aerogel and the second nanocellulose aerogel bigger after bending the use, is favorable to guaranteeing the gas permeability of gauze mask department of bending.
The mask prepared by the method needs to be packaged one by one, and the moisture absorbent is added in the packaging bag to ensure that the packaging bag is in a dry state, so that the first water swelling material and the second water swelling material in the mask are prevented from losing efficacy after a long time.
The filtering efficiency of sodium chloride particles of the mask prepared by the method is more than or equal to 95%, the antibacterial property is more than or equal to 99%, and the 90-day biodegradation rate is more than or equal to 60%.
As shown in fig. 2, a flowchart of a method for using the nanocellulose aerogel protective mask prepared using any one of the above-mentioned preparation methods of the present invention is shown, comprising the steps of:
a1, bending the mask inwards along the middle area, wherein the first water swelling materials are positioned on two sides of the nose wings;
a2, after the gas exhaled by the human body passes through the second nano cellulose aerogel, moisture in the gas is absorbed by the second water swelling material within 1-2 min;
a3, forming outward bending on the first nano cellulose aerogel and the second nano cellulose aerogel, and forming a gap at the bending position, wherein the gap is formed after the first water swelling material swells; the pores on the surface of the first nano cellulose aerogel on one side close to the surface layer of the mask become smaller, and the pores on the other side of the surface of the first nano cellulose aerogel become larger; meanwhile, the pores on the surface of the first nano cellulose aerogel close to one side of the inner layer of the mask are enlarged, and the pores on the other side of the surface of the first nano cellulose aerogel are reduced, so that the air permeability of the bending part of the mask is kept unchanged;
a4, after wearing for 3-4 hours, selecting and replacing a new mask according to the expansion degree of the first water swelling material.
In A2, the second water swelling material is closely attached to the inner layer of the mask after moisture absorption and swelling, so that the edge of the inner layer is pressed toward the inside of the mask and is attached to the skin.
The invention converts the replacement time of the mask into a visual index, and the expansion degree of the first water swelling material in the mask is easy to obtain through the observation of the mask or other people, thereby improving the replacement frequency of the mask and reducing the transmission of viruses.
According to the invention, the first nano cellulose aerogel and the second nano cellulose aerogel have different hydrophilic and hydrophobic properties, the second nano cellulose aerogel can ensure the dry and comfortable wearing of the mask, and the first nano cellulose aerogel can absorb certain gas and reduce the moist feeling of the outer side of the mask.
The above-described preferred embodiments according to the present invention are intended to suggest that, from the above description, various changes and modifications can be made by the person skilled in the art without departing from the scope of the technical idea of the present invention. The technical scope of the present invention is not limited to the description, but must be determined according to the scope of claims.
Claims (6)
1. The preparation method of the nanocellulose aerogel protective mask is characterized by comprising the following steps of:
s1, adhering or coating a first nano cellulose aerogel in the surface layer of a mask, and adhering or coating a first water swelling material on one side of the first nano cellulose aerogel; coating the second nanocellulose aerogel on the surface of the inner layer; the first water swelling material is capable of absorbing the exhaled gas or saline solution;
s2, adhering or coating a second water swelling material on the circumference of the first nano cellulose aerogel or the second nano cellulose aerogel, wherein the second water swelling material forms a ring structure;
s3, compounding the surface layer and the inner layer of the mask;
the first nano cellulose aerogel is hydrophilic nano cellulose aerogel, and the second nano cellulose aerogel is formed by graft polymerizing a hydrophobic acrylic monomer on the first nano cellulose aerogel by adopting an atom transfer radical polymerization method; the second water swelling material swells more than the first water swelling material; the first water swelling material is a plurality of linear absorbent fibers or spiral absorbent fibers which are arranged in an array manner; the surface of the first water swelling material is coated with a hydrophilic coating and a hydrophobic coating at intervals.
2. The method for preparing the nanocellulose aerogel protective mask as claimed in claim 1 wherein: the first water-swellable material is symmetrically arranged along a centerline of a length of the first nanocellulose aerogel.
3. The method for preparing the nanocellulose aerogel protective mask as claimed in claim 1 wherein: in the step S1, the surface layer of the mask is made of a linen fabric, and both the surface layer and the inner layer of the linen fabric are modified by adopting a cationic modifier and a softener, so that the softness of the linen fabric is improved.
4. The method for preparing the nanocellulose aerogel protective mask as claimed in claim 1 wherein: the first nano-cellulose aerogel and the second nano-cellulose aerogel are of microporous multi-stage pore structures.
5. A method of using a nanocellulose aerogel protective mask prepared based on the method of any one of claims 1-4, comprising the steps of:
a1, bending the mask inwards along the middle area, wherein the first water swelling materials are positioned on two sides of the nose wings;
a2, after the gas exhaled by the human body passes through the second nano cellulose aerogel, moisture in the gas is absorbed by the second water swelling material within 1-2 min;
a3, forming outward bending on the first nano cellulose aerogel and the second nano cellulose aerogel, and forming a gap at the bending position, wherein the gap is formed after the first water swelling material swells; the pores on the surface of the first nano cellulose aerogel on one side close to the surface layer of the mask become smaller, and the pores on the other side of the surface of the first nano cellulose aerogel become larger; meanwhile, the pores on the surface of the first nano cellulose aerogel close to one side of the inner layer of the mask are enlarged, and the pores on the other side of the surface of the first nano cellulose aerogel are reduced, so that the air permeability of the bending part of the mask is kept unchanged;
a4, after wearing for 3-4 hours, selecting and replacing a new mask according to the expansion degree of the first water swelling material;
the first nano cellulose aerogel is hydrophilic nano cellulose aerogel, and the second nano cellulose aerogel is formed by graft polymerizing a hydrophobic acrylic monomer on the first nano cellulose aerogel by adopting an atom transfer radical polymerization method; the second water swelling material swells more than the first water swelling material; the first water swelling material is a plurality of linear hygroscopic fibers or spiral hygroscopic fibers which are arranged in an array manner; the surface of the first water-swellable material is coated with a hydrophilic coating and a hydrophobic coating at intervals.
6. The method of use according to claim 5, wherein: in the A2, the second water swelling material is closely attached to the inner layer of the mask after moisture absorption and expansion, so that the edge of the inner layer is tightly pressed to the inner side of the mask and is attached to the skin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111560324.7A CN114190631B (en) | 2021-12-20 | 2021-12-20 | Preparation method and application method of nanocellulose aerogel protective mask |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111560324.7A CN114190631B (en) | 2021-12-20 | 2021-12-20 | Preparation method and application method of nanocellulose aerogel protective mask |
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| CN114190631A CN114190631A (en) | 2022-03-18 |
| CN114190631B true CN114190631B (en) | 2023-08-22 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105536349A (en) * | 2015-12-08 | 2016-05-04 | 张家港万众一芯生物科技有限公司 | Novel nanometer aerogel material for air filtration and preparation method thereof |
| CN205360299U (en) * | 2016-01-10 | 2016-07-06 | 张鹏 | Nostril dirt catcher |
| CN209300306U (en) * | 2018-08-22 | 2019-08-27 | 王硕 | Mask |
| CN212036092U (en) * | 2020-02-21 | 2020-12-01 | 烟台理松安全科技有限公司 | Novel graphite alkene gauze mask |
| KR102208272B1 (en) * | 2019-08-29 | 2021-01-27 | 한국교통대학교산학협력단 | Hydrogel Coating on Polymer Fibers for Filtering of Fine Dust |
| CN113769481A (en) * | 2021-09-28 | 2021-12-10 | 武汉纺织大学 | Organic-inorganic hybrid air filtration protective material with multilevel structure |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10201198B2 (en) * | 2014-12-23 | 2019-02-12 | Profit Royal Pharmaceutical Limited | Protective masks with coating comprising different electrospun fibers interweaved with each other, formulations forming the same, and method of producing thereof |
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2021
- 2021-12-20 CN CN202111560324.7A patent/CN114190631B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105536349A (en) * | 2015-12-08 | 2016-05-04 | 张家港万众一芯生物科技有限公司 | Novel nanometer aerogel material for air filtration and preparation method thereof |
| CN205360299U (en) * | 2016-01-10 | 2016-07-06 | 张鹏 | Nostril dirt catcher |
| CN209300306U (en) * | 2018-08-22 | 2019-08-27 | 王硕 | Mask |
| KR102208272B1 (en) * | 2019-08-29 | 2021-01-27 | 한국교통대학교산학협력단 | Hydrogel Coating on Polymer Fibers for Filtering of Fine Dust |
| CN212036092U (en) * | 2020-02-21 | 2020-12-01 | 烟台理松安全科技有限公司 | Novel graphite alkene gauze mask |
| CN113769481A (en) * | 2021-09-28 | 2021-12-10 | 武汉纺织大学 | Organic-inorganic hybrid air filtration protective material with multilevel structure |
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| CN114190631A (en) | 2022-03-18 |
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