CN111636115A - Polyvinyl alcohol-based fiber material for electromagnetic shielding and preparation method thereof - Google Patents
Polyvinyl alcohol-based fiber material for electromagnetic shielding and preparation method thereof Download PDFInfo
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- CN111636115A CN111636115A CN202010535187.0A CN202010535187A CN111636115A CN 111636115 A CN111636115 A CN 111636115A CN 202010535187 A CN202010535187 A CN 202010535187A CN 111636115 A CN111636115 A CN 111636115A
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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
- D01F6/44—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds
- D01F6/50—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds of polyalcohols, polyacetals or polyketals
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F120/00—Homopolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride, ester, amide, imide or nitrile thereof
- C08F120/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F120/04—Acids; Metal salts or ammonium salts thereof
- C08F120/06—Acrylic acid; Methacrylic acid; Metal salts or ammonium salts thereof
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2/00—Processes of polymerisation
- C08F2/44—Polymerisation in the presence of compounding ingredients, e.g. plasticisers, dyestuffs, fillers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/04—Carbon
- C08K3/042—Graphene or derivatives, e.g. graphene oxides
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/10—Metal compounds
- C08K3/14—Carbides
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- D—TEXTILES; PAPER
- 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
- D01D5/06—Wet spinning methods
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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
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/10—Other agents for modifying properties
- D01F1/106—Radiation shielding agents, e.g. absorbing, reflecting agents
Abstract
The invention relates to a polyvinyl alcohol-based fiber material for electromagnetic shielding and a preparation method thereof. The method comprises the following steps: adding graphene into Mxene centrifugate, stirring, adding an acrylic monomer and an initiator, carrying out copolymerization reaction, adding polyvinyl alcohol into the obtained graphene/Mxene mixed dispersion liquid, and then carrying out wet spinning. The method can realize the uniform dispersion of the graphene and the Mxene in the polymer matrix, solves the problem of poor spinnability of spinning, and the prepared fiber material has excellent electromagnetic shielding performance.
Description
Technical Field
The invention belongs to the field of functional fibers and preparation thereof, and particularly relates to a polyvinyl alcohol-based fiber material for electromagnetic shielding and a preparation method thereof.
Background
With the popularization of electronic products, the influence of electromagnetic radiation on the production and life of people is increasingly serious, the electromagnetic radiation is listed as a fourth environmental pollution source after water sources, atmosphere and noise by the world health organization, and becomes an invisible killer which is harmful to the health of people. The long-term reception of electromagnetic radiation can cause the immunity of people to be reduced, the blood pressure to be abnormal, the metabolism disorder and the memory decline even to cause cancers and the like, so the development of fabrics and clothing products with excellent electromagnetic shielding performance is very important. The research on the electromagnetic shielding fiber and the fabric is mainly prepared by mixing and weaving metal fibers and metal fibers with traditional chemical fibers, the obtained product has poor comfort and hand feeling, and compared with the high-molecular-base flexible conductive fiber, the electromagnetic shielding fiber has good electromagnetic shielding performance and good flexibility, can be used for preparing clothes and fabric products with various shapes and colors by a textile technology, and has wide market development space and application prospect.
Chinese patent CN110563966A discloses a preparation method of MXene/graphene/polyvinyl alcohol composite gel. Mixing MXene dispersion liquid and graphene oxide dispersion liquid, and carrying out hydrothermal reaction to obtain MXene/graphene composite gel; and then, dipping the MXene/graphene composite gel in a polyvinyl alcohol solution to form intermolecular hydrogen bonds, and then circularly freezing and thawing for a plurality of times to obtain the MXene/graphene/polyvinyl alcohol composite gel with controllable structure and better electrochemical performance. Compared with the patent of the invention, the stable co-dispersion solution of graphene/Mxene is realized through an in-situ polymerization mode, and meanwhile, the polyvinyl alcohol/graphene/Mxene composite fiber is prepared through subsequent spinning.
Disclosure of Invention
The invention aims to solve the technical problem of providing a polyvinyl alcohol-based fiber material for electromagnetic shielding and a preparation method thereof, so as to fill the blank in the prior art.
The invention provides a polyvinyl alcohol-based fiber material for electromagnetic shielding, which is prepared by adding graphene into Mxene centrifugate, stirring, adding an acrylic monomer and an initiator, carrying out copolymerization reaction, then adding polyvinyl alcohol, and carrying out wet spinning.
The invention also provides a preparation method of the polyvinyl alcohol-based fiber material for electromagnetic shielding, which comprises the following steps:
(1) mixing Ti3AlC2Adding the mixture into an etching agent for etching, carrying out suction filtration and water washing, placing the obtained multilayer expanded Mxene into a dispersion liquid containing polyvinyl alcohol, carrying out ultrasonic stripping to obtain an Mxene dispersion liquid, and centrifuging to obtain a supernatant;
(2) adding graphene into the Mxene centrifugate obtained in the step (1), stirring, adding an acrylic monomer and an initiator, and carrying out copolymerization reaction to obtain a graphene/Mxene mixed dispersion liquid, wherein the mass ratio of the graphene to the Mxene is 1: 1-5: 1, the acrylic monomer accounts for 60% -90% of the total mass of the graphene and the Mxene, and the dosage of the initiator accounts for 2% -10% of the total mass of the acrylic monomer, the graphene and the Mxene;
(3) and (3) adding polyvinyl alcohol into the graphene/Mxene mixed dispersion liquid obtained in the step (2), and carrying out wet spinning on the obtained ternary composite spinning liquid to obtain the polyvinyl alcohol-based fiber material for electromagnetic shielding, wherein the total mass of the graphene and the Mxene accounts for 2.5-5% of the mass of the polyvinyl alcohol.
The etching agent in the step (1) is a mixed solution of hydrochloric acid and lithium fluoride, Ti3AlC2The mass ratio of the hydrochloric acid to the lithium fluoride is 0.98: 1-1: 1, the concentration of the hydrochloric acid is 5-7 mol/L, and the bath ratio is 1: 25-1: 35.
In the step (1), the etching temperature is 20-50 ℃, and the etching time is 24-48 h.
In the step (1), the ultrasonic time is 20-60 min, and the ultrasonic power is 10-35W.
The polyvinyl alcohol in the step (1) is PVA-1799.
The mass percentage concentration of the polyvinyl alcohol in the dispersion liquid containing the polyvinyl alcohol in the step (1) is 0.4-0.6%.
And (2) the suction filtration in the step (1) is reduced pressure suction filtration.
And (2) the centrifugal rotating speed in the step (1) is 4500-6000 RPM.
And (3) in the step (2), the initiator is ammonium persulfate.
The temperature of the copolymerization reaction in the step (2) is 70-85 ℃, and the time of the copolymerization reaction is 3-6 h.
The volume concentration of the polyvinyl alcohol in the ternary composite spinning solution in the step (3) is 0.11 g/ml-0.14 g/ml.
And (3) in the step (3), the coagulation bath used for wet spinning is saturated sodium sulfate, the temperature of the coagulation bath is 25 +/-2 ℃, and the drawing ratio of a spinning nozzle is 0.05-0.25.
The invention also provides the polyvinyl alcohol-based electromagnetic shielding fiber material prepared by the method.
The invention also provides application of the polyvinyl alcohol-based fiber material for electromagnetic shielding.
According to the invention, a transition metal nano material Mxene with excellent electromagnetic shielding performance and graphene with excellent conductivity are used as functional fillers, and the uniform co-dispersion of the graphene/Mxene in a water phase is realized by using monomer micromolecules in an in-situ copolymerization mode, so that the phenomena of nonuniform and unstable dispersion of the graphene and the Mxene in a spinning solution are solved. The ternary composite fiber with excellent electromagnetic shielding performance is prepared by compounding with PVA-2099 by means of a wet spinning technology and is widely applied to preparation of various electromagnetic shielding fabrics and clothing products.
Advantageous effects
The invention can realize the uniform dispersion of graphene and Mxene in a polymer matrix, solves the problem of poor spinnability of spinning, and the prepared fiber material has excellent electromagnetic shielding performance.
Drawings
Fig. 1 is a photograph showing the sedimentation delamination of the graphene/Mxene co-dispersion (a) and the Mxene dispersion (b) prepared in example 1 after standing for one week.
Detailed Description
The invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.
The titanium aluminum carbide raw material is purchased from scientific and technological limited company of Jilin province, the hydrochloric acid, the lithium fluoride, the acrylic acid and the ammonium persulfate are purchased from Chinese medicine reagents, the polyvinyl alcohol 2099 is purchased from Anhui vitamin, and the graphene is purchased from Heizhou sixth element.
Example 1
(1) Respectively weighing 1g of Ti3AlC2And adding 30g of 6mol/L hydrochloric acid solution into a reactor, magnetically stirring at 20 ℃ for 24 hours, carrying out reduced pressure suction filtration after the reaction is finished, and washing with deionized water to be neutral to obtain the multilayer expanded Mxene. And ultrasonically stripping Mxene in PVA-1799 dispersion liquid with the mass percentage concentration of 0.5%, centrifuging and taking supernatant, wherein the centrifugal speed is 4500RPM, the ultrasonic power is 10W, and the ultrasonic time is 20 min.
(2) Adding graphene into a Mxene centrifugate (the mass percentage concentration is 0.3 wt%), uniformly stirring, wherein the mass ratio of the added graphene to the Mxene is 1:1, the copolymerization reaction temperature is 70 ℃, and the time is 3 h. And then adding 150g of graphene/Mxene mixed solution into a reactor, adding an acrylic monomer and an ammonium persulfate initiator, magnetically stirring and polymerizing for a certain time at a certain temperature, and discharging to obtain the graphene/Mxene co-dispersion system. Wherein the dosage of the polymer monomer accounts for 60% of the total mass of the graphene and the Mxene, and the dosage of the initiator accounts for 2% of the total mass of the polymer monomer, the graphene and the Mxene.
(3) Dissolving and compounding the graphene/Mxene mixed dispersion liquid obtained by polymerization and a certain amount of PVA-2099 slices to obtain the ternary composite spinning solution, wherein the volume concentration of PVA-2099 in the ternary composite spinning solution is 0.11g/ml, and the total mass of graphene and Mxene accounts for 2.5% of the mass of PVA-2099. And then preparing the composite fiber by using a wet spinning technology, wherein the electromagnetic shielding efficiency (the electromagnetic shielding performance is tested by using a microwave network vector analyzer, the testing frequency range is 2-18GHz) is 25dB, the coagulation bath used for spinning is saturated sodium sulfate, the temperature of the coagulation bath is 25 +/-2 ℃, and the drawing ratio of a spinning nozzle is 0.05. The experimental method can be used for preparing the graphene/Mxene co-dispersion liquid with better dispersibility, and the phenomenon of sedimentation does not occur after standing for one week. Fig. 1(a, graphene/Mxene co-dispersion prepared in this experiment, b is Mxene dispersion) is the dispersion of the two solutions at rest for one week.
Example 2
(1) And (3) magnetically stirring and reacting for 48 hours at 50 ℃, wherein the centrifugal rotating speed is 6000RPM, the ultrasonic power is 35W, the ultrasonic time is 60min, and the rest is the same as that in the example 1 to obtain the Mxene centrifugate.
(2) Adding graphene into a Mxene centrifugate (the mass percentage concentration is 0.3 wt%), uniformly stirring, wherein the mass ratio of the added graphene to the Mxene is 5:1, the copolymerization reaction temperature is 85 ℃, and the time is 6 hours. And then adding 150g of graphene/Mxene mixed solution into a reactor, adding an acrylic monomer and an ammonium persulfate initiator, magnetically stirring and polymerizing for a certain time at a certain temperature, and discharging to obtain the graphene/Mxene co-dispersion system. Wherein the using amount of the polymer monomer accounts for 90% of the total mass of the graphene and the Mxene, and the using amount of the initiator accounts for 10% of the total mass of the polymer monomer, the graphene and the Mxene.
(3) Dissolving and compounding the graphene/Mxene mixed dispersion liquid obtained by polymerization and a certain amount of PVA-2099 slices to obtain the ternary composite spinning solution, wherein the volume concentration of PVA-2099 in the ternary composite spinning solution is 0.14g/ml, and the total mass of graphene and Mxene accounts for 5% of the mass of PVA-2099. And then, preparing the composite fiber by using a wet spinning technology, wherein the electromagnetic shielding efficiency is 30dB (a microwave network vector analyzer is adopted to carry out an electromagnetic shielding performance test, and the test frequency range is 2-18 GHz). The coagulating bath used for spinning is saturated sodium sulfate, the temperature of the coagulating bath is 25 +/-2 ℃, and the drawing ratio of a spinning nozzle is 0.25.
Example 3
(1) And (3) magnetically stirring and reacting for 30h at 40 ℃, wherein the centrifugal rotation speed is 5000RPM, the ultrasonic power is 30W, the ultrasonic time is 40min, and the rest is the same as that in the example 1 to obtain the Mxene centrifugate.
(2) Adding graphene into a Mxene centrifugate (the mass percentage concentration is 0.3 wt%), uniformly stirring, wherein the mass ratio of the added graphene to the Mxene is 4:1, the copolymerization reaction temperature is 80 ℃, and the time is 5 hours. And then adding 150g of graphene/Mxene mixed solution into a reactor, adding an acrylic monomer and an ammonium persulfate initiator, magnetically stirring and polymerizing for a certain time at a certain temperature, and discharging to obtain the graphene/Mxene co-dispersion system. Wherein the using amount of the polymer monomer accounts for 80% of the total mass of the graphene and the Mxene, and the using amount of the initiator accounts for 5% of the total mass of the polymer monomer, the graphene and the Mxene.
(3) Dissolving and compounding the graphene/Mxene mixed dispersion liquid obtained by polymerization and a certain amount of PVA-2099 slices to obtain the ternary composite spinning solution, wherein the volume concentration of PVA-2099 in the ternary composite spinning solution is 0.13g/ml, and the total mass of graphene and Mxene accounts for 4% of the mass of PVA-2099. And then, preparing the composite fiber by using a wet spinning technology, wherein the shielding effectiveness is 26.7dB (a microwave network vector analyzer is adopted to carry out electromagnetic shielding performance test, and the test frequency range is 2-18 GHz). The coagulating bath used for spinning is saturated sodium sulfate, the temperature of the coagulating bath is 25 +/-2 ℃, and the drawing ratio of a spinning nozzle is 0.1.
Claims (10)
1. A polyvinyl alcohol-based fiber material for electromagnetic shielding is prepared by adding graphene into Mxene centrifugate, stirring, adding acrylic acid monomer and initiator, carrying out copolymerization reaction, adding polyvinyl alcohol, and carrying out wet spinning.
2. A preparation method of a polyvinyl alcohol-based fiber material for electromagnetic shielding comprises the following steps:
(1) mixing Ti3AlC2Adding the mixture into an etching agent for etching, carrying out suction filtration and water washing, placing the obtained multilayer expanded Mxene into a dispersion liquid containing polyvinyl alcohol, carrying out ultrasonic stripping to obtain an Mxene dispersion liquid, and centrifuging to obtain a supernatant;
(2) adding graphene into the Mxene centrifugate obtained in the step (1), stirring, adding an acrylic monomer and an initiator, and carrying out copolymerization reaction to obtain a graphene/Mxene mixed dispersion liquid, wherein the mass ratio of the graphene to the Mxene is 1: 1-5: 1, the acrylic monomer accounts for 60% -90% of the total mass of the graphene and the Mxene, and the initiator accounts for 2% -10% of the total mass of the acrylic monomer, the graphene and the Mxene;
(3) and (3) adding polyvinyl alcohol into the graphene/Mxene mixed dispersion liquid obtained in the step (2), and carrying out wet spinning on the obtained ternary composite spinning solution to obtain the polyvinyl alcohol-based fiber material for electromagnetic shielding, wherein the total mass of the graphene and the Mxene accounts for 2.5-5% of the mass of the polyvinyl alcohol.
3. The method according to claim 2, wherein the etchant in step (1) is a mixed solution of hydrochloric acid and lithium fluoride, Ti3AlC2The mass ratio of the hydrochloric acid to the lithium fluoride is 0.98: 1-1: 1, the concentration of the hydrochloric acid is 5-7 mol/L, and the bath ratio is 1: 25-35.
4. The method according to claim 2, wherein in the step (1), the etching temperature is 20-50 ℃, and the etching time is 24-48 h; the ultrasonic time is 20-60 min, and the ultrasonic power is 10-35W.
5. The method of claim 2, wherein the polyvinyl alcohol in step (1) is PVA-1799; the mass percentage concentration of the polyvinyl alcohol in the dispersion liquid containing the polyvinyl alcohol is 0.4-0.6%.
6. The method of claim 2, wherein the initiator in the step (2) is ammonium persulfate.
7. The method according to claim 2, wherein the temperature of the copolymerization reaction in the step (2) is 70-85 ℃ and the time of the copolymerization reaction is 3-6 h.
8. The method according to claim 2, wherein the volume concentration of the polyvinyl alcohol in the ternary composite spinning solution in the step (3) is 0.11g/ml to 0.14 g/ml; the coagulating bath used for wet spinning forming is saturated sodium sulfate, the temperature of the coagulating bath is 25 +/-2 ℃, and the drawing ratio of a spinning nozzle is 0.05-0.25.
9. The polyvinyl alcohol-based electromagnetic shielding fiber material prepared by the method of claim 2.
10. Use of a fibrous material according to claim 1.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112144148A (en) * | 2020-09-11 | 2020-12-29 | 东华大学 | Preparation method of high-strength MXene fiber |
| CN112831143A (en) * | 2021-01-08 | 2021-05-25 | 西安理工大学 | Preparation method of compressible MXene/polymer electromagnetic shielding aerogel |
| CN112876712A (en) * | 2021-01-21 | 2021-06-01 | 北京理工大学 | MXene-based flexible polyvinyl alcohol electromagnetic shielding composite film and preparation method thereof |
| CN113201802A (en) * | 2021-04-27 | 2021-08-03 | 华中科技大学 | Tension sensing fiber, yarn, fabric and tension sensing fiber preparation method |
| CN113235202A (en) * | 2021-05-07 | 2021-08-10 | 华中科技大学 | Multifunctional fabric and preparation method and application thereof |
| WO2022228330A1 (en) * | 2021-04-27 | 2022-11-03 | 华中科技大学 | Sensing fiber, multifunctional fabric, preparation method therefor and application thereof |
| CN115467082A (en) * | 2022-10-08 | 2022-12-13 | 哈尔滨工业大学 | Preparation method of light and efficient MXene fiber non-woven fabric for electromagnetic shielding |
| CN115537972A (en) * | 2022-11-04 | 2022-12-30 | 南开大学 | Preparation method of mechanically interlocked high-performance titanium carbide composite conductive fiber |
| CN116178959A (en) * | 2023-02-23 | 2023-05-30 | 中国石油大学(华东) | Graphene acousto-electric signal conversion film, preparation method, detector and sensing device |
| WO2023154004A3 (en) * | 2022-02-14 | 2023-10-12 | Nanyang Technological University | Fiber and method of forming the same |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112144148A (en) * | 2020-09-11 | 2020-12-29 | 东华大学 | Preparation method of high-strength MXene fiber |
| CN112144148B (en) * | 2020-09-11 | 2021-05-25 | 东华大学 | Preparation method of high-strength MXene fiber |
| CN112831143A (en) * | 2021-01-08 | 2021-05-25 | 西安理工大学 | Preparation method of compressible MXene/polymer electromagnetic shielding aerogel |
| CN112876712A (en) * | 2021-01-21 | 2021-06-01 | 北京理工大学 | MXene-based flexible polyvinyl alcohol electromagnetic shielding composite film and preparation method thereof |
| WO2022228330A1 (en) * | 2021-04-27 | 2022-11-03 | 华中科技大学 | Sensing fiber, multifunctional fabric, preparation method therefor and application thereof |
| CN113201802A (en) * | 2021-04-27 | 2021-08-03 | 华中科技大学 | Tension sensing fiber, yarn, fabric and tension sensing fiber preparation method |
| CN113235202A (en) * | 2021-05-07 | 2021-08-10 | 华中科技大学 | Multifunctional fabric and preparation method and application thereof |
| WO2023154004A3 (en) * | 2022-02-14 | 2023-10-12 | Nanyang Technological University | Fiber and method of forming the same |
| CN115467082A (en) * | 2022-10-08 | 2022-12-13 | 哈尔滨工业大学 | Preparation method of light and efficient MXene fiber non-woven fabric for electromagnetic shielding |
| CN115537972A (en) * | 2022-11-04 | 2022-12-30 | 南开大学 | Preparation method of mechanically interlocked high-performance titanium carbide composite conductive fiber |
| CN115537972B (en) * | 2022-11-04 | 2023-09-19 | 南开大学 | Preparation method of mechanically-interlocked high-performance titanium carbide composite conductive fiber |
| CN116178959A (en) * | 2023-02-23 | 2023-05-30 | 中国石油大学(华东) | Graphene acousto-electric signal conversion film, preparation method, detector and sensing device |
| CN116178959B (en) * | 2023-02-23 | 2024-02-23 | 中国石油大学(华东) | Graphene acousto-electric signal conversion film, preparation method, detector and sensing device |
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