CN108771981A - Graphene composite material and its preparation method and application, graphene-carbon nano-fiber film and preparation method thereof - Google Patents
Graphene composite material and its preparation method and application, graphene-carbon nano-fiber film and preparation method thereof Download PDFInfo
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01D71/02—Inorganic material
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/54—Particle separators, e.g. dust precipitators, using ultra-fine filter sheets or diaphragms
- B01D46/543—Particle separators, e.g. dust precipitators, using ultra-fine filter sheets or diaphragms using membranes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/54—Particle separators, e.g. dust precipitators, using ultra-fine filter sheets or diaphragms
- B01D46/546—Particle separators, e.g. dust precipitators, using ultra-fine filter sheets or diaphragms using nano- or microfibres
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- B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
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Abstract
The present invention relates to a kind of graphene composite materials and its preparation method and application, graphene-carbon nano-fiber film and preparation method thereof, belong to nano-fiber material technical field.The graphene composite material of the present invention, including nanofiber and the graphene that is grafted on the nanofiber；The nanofiber includes organic polymer, and the organic polymer is at least one of polyacrylonitrile, polyvinylpyrrolidone, polyurethane.Graphene composite material ingredient of the invention is simple, absorption property is excellent, can fully meet the technical need detached currently with nanofiber, and the graphene composite material raw material is easy to get, preparation process is simple, has a vast market application prospect.
Description
Technical field
The present invention relates to a kind of graphene composite material and its preparation method and application, graphenes-carbon nano-fiber film
And preparation method thereof, belong to nano-fiber material technical field.
Background technology
Nanofiber three-dimensional network can be applied to Water warfare, air mistake as a kind of medium of novel membrane separation technique
The field of environment protection such as filter.The material generally has high large specific surface area, surface energy and activity, fiber fine degree and homogeneity
The features such as high.And when particulate matter is more than aperture in film, the phenomenon that being not in dirt deposition on nano fibrous membrane, nanometer
Tunica fibrosa can also greatly prolong the service life of filter core.Nanofiber membrane separation technique also has easy to operate, treatment effeciency
Many advantages, such as high, pollution-free, safe and energy saving.
In recent years, air pollution getting worse constantly threatens public health.Studies have shown that being exposed to PM2.5 for a long time
There is acute or chronic influence to the immune system of human body and nervous system in grain substance environment.Usual people are carried out by wearing mask
Self-protection, but regrettably traditional filter face mask is extremely low to superfine particulate matter PM2.5 removal efficiency, and protective effect is very
It is limited.
In order to solve these problems, researcher develops different types of nanofiber in laboratory conditions
Film realizes sufficiently high bulk density using the feature that nanofiber surface is smooth and fibre diameter is small, to pass through machinery
The capacitation power caught to tiny particles content is realized in filtering.However, the high-bulk-density that mechanical filter is relied on, leads to gas-flow resistance very
Height is easy to blocking filter and shortens the usage time of filter.
In recent years, real although can introduce doped nanoparticle by layering prepares " sandwich " MULTILAYER COMPOSITE filter membrane
Existing higher filter efficiency and relatively low gas-flow resistance, but since nano particle is difficult to uniformly divide in nanofiber surface
It dissipates, causes the filter efficiency of film uneven, PM2.5 removal efficiency is still not ideal enough.Meanwhile " sandwich " multi-layer compound structure film
Preparation process it is complicated, it is with high costs.
Invention content
The purpose of the present invention is to provide a kind of graphene composite materials of good filtration effect.
The present invention also aims to provide a kind of preparation method and application of above-mentioned graphene composite material.
The present invention also aims to provide a kind of graphene-carbon nano-fiber made from above-mentioned graphene composite material
Film and preparation method thereof.
To achieve the above object, the technical solution of graphene composite material of the invention is：
A kind of graphene composite material, including nanofiber and the graphene that is grafted on the nanofiber；It is described
Nanofiber includes organic polymer, the organic polymer is polyacrylonitrile, polyvinylpyrrolidone, in polyurethane at least
It is a kind of.
The graphene composite material of the present invention includes nanofiber and graphene, due to graphene large specific surface area, absorption
It has excellent performance, there are the oxygen-containing functional groups such as a large amount of C sp3 hydridization defects and C=O/-OH/-COOH on surface.It is bonded by C-O-C
Make its stable scion grafting on nanofiber, the artificial cross-linked structure that scion grafting is formed can increase the hole of network made of nanofiber
Gap rate and specific surface area, the firm absorption for not only improving PM particulate matters greatly reduce gas-flow resistance in filter process again.
The graphene composite material is graphene composite film.Film herein can be using fiber be made into have it is larger
The three-dimensional cross-linked reticular structure of porosity.The graphene composite material of the present invention, which is that a kind of novel artificial cross-linked graphene is compound, to be received
Rice fibre three-dimensional network, the three-dimensional net structure are total to by the graphene of nanofiber and uniform scion grafting on nanofiber surface
It is same to build composition.
The mass ratio of the nanofiber and graphene is 60：(1~6).The graphene is redox graphene.
It is also grafted with inorganic filler on the nanofiber.The inorganic filler is two hydrated stannous chlorides, four fourth of metatitanic acid
At least one of ester.
Organic polymer and the mass ratio of inorganic filler are 6 in the nanofiber：(3~4).
The technical solution of preparation method of the graphene composite material of the present invention is：
A kind of preparation method of graphene composite material, includes the following steps：
1) redox graphene, matrix material, solvent are uniformly mixed, obtain graphene composite material presoma；Institute
It includes organic polymer to state matrix material, the organic polymer is polyacrylonitrile, polyvinylpyrrolidone, in polyurethane extremely
Few one kind；
2) the graphene composite material presoma obtained step 1) carry out electrostatic spinning to get.
The preparation method of the graphene composite material of the present invention can increase substantially the porosity of nano-fiber material, ratio
Surface area, and it is effectively improved its chemical mobility of the surface, prepare the mistake with low air flow resistance, high PM particulate matter removal efficiencies
Filter material material, and preparation process is simple, is suitable for large-scale industrial production, huge potentiality are shown in field of environment protection.
The mass ratio of the redox graphene and matrix material is (1-6)：60.
The mass ratio of the redox graphene and solvent is 1：(100-1000).
The solvent is the one or several kinds in N,N-dimethylformamide, ethyl alcohol.
Described matrix raw material further includes inorganic filler.The inorganic filler is in two hydrated stannous chlorides, butyl titanate
At least one.
Organic polymer and the mass ratio of inorganic filler are 6 in the compound material：(3-4).
The parameter of the electrostatic spinning is：Electrostatic spinning machine high pressure is 10-13kV.The distance between syringe needle and receiver board are
About 15-20cm.Spinning temperature is 20-25 DEG C.Humidity is 20-30%.
The technical solution of graphene-carbon nano-fiber film of the present invention is：
A kind of graphene-carbon nano-fiber film is carbonized to obtain, the graphene composite material by graphene composite material
Including nanofiber and the graphene being grafted on the nanofiber；The nanofiber includes organic polymer, described
Organic polymer is at least one of polyacrylonitrile, polyvinylpyrrolidone, polyurethane.
The technical solution of preparation method of graphene-carbon nano-fiber film of the present invention is：
A kind of preparation method of above-mentioned graphene-carbon nano-fiber film, includes the following steps：The graphene is answered
Condensation material is sintered 1-1.5h at 270-300 DEG C and is pre-oxidized, then under protective atmosphere, be heated to 900-1000 DEG C to get.
It is heated to 900-1000 DEG C to begin to cool, after cooling to obtain the final product.
The 270-300 DEG C of sintering 1-1.5h is carried out in air atmosphere.The protective atmosphere is nitrogen atmosphere.
The technical solution of application of the graphene composite material of the present invention is：
A kind of application of above-mentioned graphene composite material in terms of adsorbent solid particulate matter.Specifically, the application be
Application in terms of mask, function window or automobile exhaust gas processing apparatus.
The beneficial effects of the invention are as follows：
Graphene composite material ingredient of the invention is simple, absorption property is excellent, can fully meet currently with Nanowire
The technical need of separation is tieed up, and the graphene composite material raw material is easy to get, preparation process is simple, before having a vast market application
Scape.The present invention utilizes the absorption that rGO is excellent by introducing equally distributed redox graphene (rGO) piece in nano wire
Ability and its percent crystallization in massecuite and mechanical property better than graphene oxide.Further hole is woven using electrospinning process Direct Spinning
The composite nano fiber three-dimensional network filter membrane that rate is high, flexibility is excellent has filled up the skill of efficient low air flow resistance PM2.5 filterings
Art blank has important technical meaning and wide application prospect.
Description of the drawings
Fig. 1 is the shape appearance figure of the graphene composite material of embodiment 2, wherein figure a is macroscopical picture, and figure b is scanning electron microscope
Figure, figure c are transmission electron microscope picture；
Fig. 2 is the vehicle exhaust absorption test design sketch of the graphene composite material of embodiment 2；Wherein, figure a is car tail
Aspiration adhesion test, figure b are the vehicle exhaust adsorption efficiency figure of graphene composite material；
Fig. 3 is the scanning electron microscope (SEM) photograph after the PM particulate matters absorption test of the graphene composite material of embodiment 2.
Specific implementation mode
Technical scheme of the present invention is described further with reference to specific embodiment.
Embodiment 1
The graphene composite material of the present embodiment, including nanofiber and the graphite that is grafted on the nanofiber
Alkene；Nanofiber is polyacrylonitrile fibre.The mass ratio of nanofiber and graphene is 50：1.
The preparation method of the graphene composite material of the present embodiment, includes the following steps：
1) redox graphene powder is added in solvent n,N-Dimethylformamide, after ultrasonic disperse 30min, Xiang Qi
Middle addition polyacrylonitrile (PAN) powder utilizes magnetic stirrer that above-mentioned mixed liquor is stirred 12h to uniform state, obtains at room temperature
Graphene composite material precursor solution.Above-mentioned redox graphene powder, polyacrylonitrile (PAN) powder and solvent N, N- diformazan
The mass ratio of base formamide is 1:50:800, PAN weight average molecular weight Mw is 150000.
2) graphene composite material presoma made from step 1) is subjected to electrostatic spinning, waits for that spinning electric current and voltage are steady
After fixed, the nozzle of electrostatic spinning machine is controlled at a distance from receiver board, and the wire vent state of adjusting shower nozzle, obtained PAN/rGO is compound
Nanofiber, as graphene composite material.The condition of above-mentioned electrostatic spinning is：Electrostatic spinning machine high pressure be 10kV, syringe needle with
The distance between receiver board is about 15cm, and spinning temperature is 25 DEG C, humidity 29.7%.
Embodiment 2
The graphene composite material of the present embodiment, including nanofiber and the graphite that is grafted on the nanofiber
Alkene；Nanofiber is polyacrylonitrile fibre.The mass ratio of nanofiber and graphene is 37：1.
The preparation method of the graphene composite material of the present embodiment, includes the following steps：
1) redox graphene powder is added in solvent n,N-Dimethylformamide, after ultrasonic disperse 25min, Xiang Qi
Middle addition polyacrylonitrile (PAN) powder utilizes magnetic stirrer that above-mentioned mixed liquor is stirred 12h to uniform state, obtains at room temperature
Graphene composite material precursor solution.Above-mentioned redox graphene powder, polyacrylonitrile (PAN) powder and solvent N, N- diformazan
The mass ratio of base formamide is 1:37:600, PAN weight average molecular weight Mw is 150000.
2) graphene composite material presoma made from step 1) is subjected to electrostatic spinning, waits for that spinning electric current and voltage are steady
After fixed, the nozzle of electrostatic spinning machine is controlled at a distance from receiver board, and the wire vent state of adjusting shower nozzle, obtained PAN/rGO is compound
Nanofiber, as graphene composite material.The condition of above-mentioned electrostatic spinning is：Electrostatic spinning machine high pressure be 10kV, syringe needle with
The distance between receiver board is about 15cm, and spinning temperature is 25 DEG C, humidity 29.7%.
Embodiment 3
The graphene composite material of the present embodiment, including nanofiber and the graphite that is grafted on the nanofiber
Alkene；Nanofiber is polyacrylonitrile fibre.The mass ratio of nanofiber and graphene is 10：1.
The preparation method of the graphene composite material of the present embodiment, includes the following steps：
1) redox graphene powder is added in solvent n,N-Dimethylformamide, after ultrasonic disperse 25min, Xiang Qi
Middle addition polyacrylonitrile (PAN) powder utilizes magnetic stirrer that above-mentioned mixed liquor is stirred 12h to uniform state, obtains at room temperature
Graphene composite material precursor solution.Above-mentioned redox graphene powder, polyacrylonitrile (PAN) powder and solvent N, N- diformazan
The mass ratio of base formamide is 1:10:155, PAN weight average molecular weight Mw is 150000.
2) graphene composite material presoma made from step 1) is subjected to electrostatic spinning, waits for that spinning electric current and voltage are steady
After fixed, the nozzle of electrostatic spinning machine is controlled at a distance from receiver board, and the wire vent state of adjusting shower nozzle, obtained PAN/rGO is compound
Nanofiber, as graphene composite material.The condition of above-mentioned electrostatic spinning is：Electrostatic spinning machine high pressure be 10kV, syringe needle with
The distance between receiver board is about 15cm, and spinning temperature is 25 DEG C, humidity 29.7%.
Embodiment 4
The graphene composite material of the present embodiment, the graphene composite material are that polyvinylpyrrolidone/graphene is compound
Tunica fibrosa is made by polyvinylpyrrolidone/graphene composite fibre.Polyvinylpyrrolidone/graphene composite fibre includes
Nanofiber and the graphene being grafted on nanofiber；Nanofiber is polyvinyl pyrrolidone fibers.Nanofiber with
The mass ratio of graphene is 30:1.
The preparation method of the graphene composite material of the present embodiment, includes the following steps：
1) redox graphene powder is added in solvent n,N-Dimethylformamide, after ultrasonic disperse 30min, Xiang Qi
Middle addition polyvinylpyrrolidone and 4mL absolute ethyl alcohols utilize magnetic stirrer that above-mentioned mixed liquor is stirred 12h to equal at room temperature
Even state obtains graphene composite material presoma.Above-mentioned redox graphene powder, polyvinylpyrrolidone and solvent N,
The mass ratio of dinethylformamide is 1:30:600, the weight average molecular weight Mw of polyvinylpyrrolidone is 1300000.
2) graphene composite material presoma made from step 1) is subjected to electrostatic spinning, the condition of electrostatic spinning is：It is quiet
Electrospun machine high pressure is 13kV, and the distance between syringe needle and receiver board are about 15cm,
Spinning temperature is 23 DEG C, humidity 30%.
Embodiment 5
The graphene composite material of the present embodiment, the graphene composite material are polyvinylpyrrolidone/graphene/chlorination
Stannous composite cellulosic membrane is made by polyvinylpyrrolidone/graphene/stannous chloride composite fibre.Polyvinylpyrrolidone/stone
Black alkene/stannous chloride composite fibre includes nanofiber and the graphene being grafted on nanofiber and inorganic filler；Nanometer
Fiber is polyvinyl pyrrolidone fibers, and inorganic filler is stannous chloride.Nanofiber, graphene, inorganic filler mass ratio
It is 60：1：30.
The preparation method of the graphene composite material of the present embodiment, includes the following steps：
1) redox graphene powder is added in solvent n,N-Dimethylformamide, after ultrasonic disperse 30min, Xiang Qi
Middle addition polyvinylpyrrolidone, 4mL ethyl alcohol, two hydrated stannous chlorides utilize magnetic stirrer by above-mentioned mixed liquor at room temperature
12h is stirred to uniform state, obtains graphene composite material presoma.Above-mentioned redox graphene powder, polyvinyl pyrrole
The mass ratio of alkanone, inorganic filler and solvent n,N-Dimethylformamide is 1：60：30：240, the weight of polyvinylpyrrolidone is equal
Molecular weight Mw is 1300000.
2) graphene composite material presoma made from step 1) is subjected to electrostatic spinning, waits for that spinning electric current and voltage are steady
After fixed, the distance between nozzle and receiver board of electrostatic spinning machine are controlled, the wire vent state of adjusting shower nozzle, above-mentioned electrostatic spinning
Condition is：Electrostatic spinning machine high pressure is 13kV, and the distance between syringe needle and receiver board are about 15cm, and spinning temperature is 25 DEG C, wet
Degree is 30%.Obtained polyvinylpyrrolidone/graphene/stannic chloride composite cellulosic membrane, as graphene composite material.
Embodiment 6
The graphene composite material of the present embodiment, including nanofiber and the graphite that is grafted on the nanofiber
Alkene；Nanofiber is polyacrylonitrile fibre.The mass ratio of nanofiber and graphene is 37：1.
The preparation method of the graphene composite material of the present embodiment, includes the following steps：
1) redox graphene powder is added in solvent n,N-Dimethylformamide, after ultrasonic disperse 30min, Xiang Qi
Middle addition polyacrylonitrile (PAN) powder utilizes magnetic stirrer that above-mentioned mixed liquor is stirred 12h to uniform state, obtains at room temperature
Graphene composite material presoma.Above-mentioned redox graphene powder, polyacrylonitrile (PAN) powder and solvent N, N- dimethyl methyl
The mass ratio of amide is 1:37:180, PAN weight average molecular weight Mw is 150000.
2) graphene composite material presoma made from step 1) is subjected to electrostatic spinning, waits for that spinning electric current and voltage are steady
After fixed, the distance between the receiver board of electrostatic spinning machine is controlled, the wire vent state of adjusting shower nozzle, obtained PAN/rGO is compound
Nano fibrous membrane, as graphene composite material.The condition of above-mentioned electrostatic spinning is：Electrostatic spinning machine high pressure is 10kV, syringe needle
The distance between receiver board is about 15cm, and spinning temperature is 25 DEG C, humidity 30%.
Graphene-the carbon nano-fiber film of the present embodiment is made using above-mentioned graphene composite material.Preparation method
Include the following steps：
By above-mentioned graphene composite material, 270 DEG C of pre-oxidation are sintered 1h in Muffle furnace, are then transferred into tube furnace
Under nitrogen protection atmosphere, 900 DEG C are heated to, then cools to room temperature with the furnace, obtains graphene-carbon nano-fiber film.
Embodiment 7
Graphene-the carbon nano-fiber film of the present embodiment uses the graphene composite material in embodiment 4 to be made.It is made
Preparation Method includes the following steps：
By above-mentioned graphene composite material, 270 DEG C of pre-oxidation are sintered 1.5h in Muffle furnace, are then transferred into tube furnace
Under nitrogen protection atmosphere, 900 DEG C are heated to, then cools to room temperature with the furnace, obtains graphene-carbon nano-fiber film.
Embodiment 8
Difference lies in nanofiber, graphene, inorganic fillers with embodiment 5 for the graphene composite material of the present embodiment
Mass ratio be 60：1：40.It is other identical as in embodiment 5.
Graphene-the carbon nano-fiber film of the present embodiment is made using above-mentioned graphene composite material.Preparation method
Include the following steps：
By above-mentioned graphene composite material, 270 DEG C of pre-oxidation are sintered 1.2h in Muffle furnace, are then transferred into tube furnace
Under argon atmosphere, it is heated to 900 DEG C and then cools to room temperature, obtain graphene-carbon nano-fiber film.
Embodiment 9
The graphene composite material of the present embodiment and embodiment 5 difference lies in, inorganic filler uses butyl titanate,
It is identical in his equal and embodiment 5.
Graphene-the carbon nano-fiber film of the present embodiment is made using above-mentioned graphene composite material.Preparation method
Include the following steps：
By above-mentioned graphene composite material, 270 DEG C of pre-oxidation are sintered 1.2h in Muffle furnace, are then transferred into tube furnace
Under argon atmosphere, it is heated to 1000 DEG C and then cools to room temperature with the furnace, obtain graphene-carbon nano-fiber film.
Test example
1) micro-structural test
Electronic Speculum test is scanned to the graphene composite material in embodiment 1, test results are shown in figure 1.
By in embodiment 1-3 graphene composite material and carbon nano-composite fiber detect its specific surface area and porosity,
Testing result is as shown in table 1.
The performance of graphene composite material in 1 embodiment 1-3 of table
As shown in Table 1, graphene composite material produced by the present invention has the characteristics that high-specific surface area and high porosity.This
Sample so that graphene-carbon nano-fiber film obtained also has very high specific surface area and porosity.
2) absorption property detects
Vehicle exhaust absorption treating device is made in the graphene composite material of embodiment 2, utilizes particle collector and difference
The PM particulate matters absorption property and gas permeability of the graphene composite material of pressure meter detection embodiment 2, and be calculated according to the following formula
Comprehensive adsorption efficiency quality factor q F, wherein removal rate are E%, and pressure drop is Δ P.
Test result is：Remove the efficiency of PM particulate matters>99.9%, it is calculated by E%=99.9%, pressure drop Δ P is 70Pa,
Surface density is 1.48g/m2, the results are shown in Figure 2.It is vehicle exhaust adsorption test that a is schemed in Fig. 2, and figure b is graphene composite material
Vehicle exhaust adsorption efficiency.
Result of calculation QF is 0.098Pa-1。
The scanning electron microscope (SEM) photograph of graphene composite material after test is as shown in Figure 3.
By above-mentioned test result it is found that the graphene composite nano-fiber membrane synthesized by a step electrostatic spinning, is one
The efficient PM filters of kind.Compounds of the PAN and rGO in this composite nano-fiber membrane is not only mechanical mixture, Er Qieshi
Pass through the bonded branches of C-O-C.Importantly, there is positive evidence to show that the addition of rGO helps to increase the specific surface of nanofiber
Product and porosity, to reduce gas-flow resistance.During this investigation it turned out, the composite nano fiber filter highest quality of these acquisitions
The factor (QF) can reach 0.098Pa-1, filtration resistance 70Pa, show graphene nano fiber filter have excellent synthesis
Absorption property.In addition, the synergistic effect of graphene and nanofiber also functions to important function.
Claims (10)
1. a kind of graphene composite material, which is characterized in that including nanofiber and the stone being grafted on the nanofiber
Black alkene；The nanofiber includes organic polymer, and the organic polymer is polyacrylonitrile, polyvinylpyrrolidone, poly- ammonia
At least one of ester.
2. graphene composite material according to claim 1, it is characterised in that：The quality of the nanofiber and graphene
Than being 60:(1~6).
3. graphene composite material according to claim 1, it is characterised in that：It has been also loaded on the nanofiber inorganic
Filler.
4. graphene composite material according to claim 3, it is characterised in that：The organic polymer and inorganic filler
Mass ratio is 6：(3~4).
5. graphene composite material according to any one of claims 1-4, it is characterised in that：The graphene composite wood
Material is graphene composite film.
6. a kind of preparation method of graphene composite material, which is characterized in that include the following steps：
1) redox graphene, matrix material, solvent are uniformly mixed, obtain graphene composite material presoma；The base
Body raw material includes organic polymer, and the organic polymer is at least one in polyacrylonitrile, polyvinylpyrrolidone, polyurethane
Kind；
2) the graphene composite material presoma obtained step 1) carry out electrostatic spinning to get.
7. the preparation method of graphene composite material according to claim 6, it is characterised in that：The reduction-oxidation graphite
The mass ratio of alkene and solvent is 1：(100~1000).
8. a kind of graphene-carbon nano-fiber film, which is characterized in that be carbonized to obtain by graphene composite material, the graphite
Alkene composite material includes nanofiber and the graphene that is grafted on the nanofiber；The nanofiber includes organic poly-
Object is closed, the organic polymer is at least one of polyacrylonitrile, polyvinylpyrrolidone, polyurethane.
9. a kind of preparation method of graphene-carbon nano-fiber film as claimed in claim 8, which is characterized in that including such as
Lower step：The graphene composite material is sintered 1-1.5h at 270-300 DEG C and is heated to 900- then under protective atmosphere
1000 DEG C to get.
10. a kind of application of graphene composite material as described in claim 1 in terms of adsorbent solid particulate matter.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110611965A (en) * | 2019-08-23 | 2019-12-24 | 东华大学 | A kind of far-infrared radiation heating fabric and its preparation method |
| CN114808279A (en) * | 2022-05-20 | 2022-07-29 | 俞平 | Manufacturing method of fabric sensing array for automobile cushion and product |
| WO2022240364A1 (en) * | 2021-05-12 | 2022-11-17 | National University Of Singapore | A composite |
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