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Preparation method for graphene/aramid fibre 1414 nano-fibre composite membrane

A technology of nanofibers and graphene, which is applied in the field of preparation of nanocomposite materials, can solve the problems of limited application and processing, difficult dissolution and dispersion, etc., and achieve the effects of improved Young's modulus, excellent mechanical properties, and good heat resistance

Inactive Publication Date: 2013-06-12
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, aramid 1414 fibers can show more potential in composite materials, but the finished aramid 1414 fibers and yarns are difficult to dissolve and disperse, and the macroscopic morphology limits its application and application in composite materials. processing

Method used

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  • Preparation method for graphene/aramid fibre 1414 nano-fibre composite membrane
  • Preparation method for graphene/aramid fibre 1414 nano-fibre composite membrane
  • Preparation method for graphene/aramid fibre 1414 nano-fibre composite membrane

Examples

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Effect test

Embodiment 1

[0021] In a 500 ml beaker, first add 20 ml of prepared aramid 1414 nanofibers in dimethyl sulfoxide (2 mg / mL), then slowly add 8.0 ml of graphene oxide in dimethyl sulfoxide (5 mg / ml), magnetic stirring reaction at room temperature for 30 min to obtain a flocculent precipitate of graphene oxide / aramid 1414 nanofiber composite. After the reaction, the mixed solution was separated by centrifugation in a high-speed centrifuge (7000 rpm), and the lower layer of sediment was removed and dispersed in 20 ml of deionized water. After being dispersed by ultrasonication for 15 min, it was poured into a sand core filter device and used The graphene oxide / aramid fiber 1414 nanofiber composite filter cake was obtained by vacuum filtration with a 0.22 micron vinylidene fluoride filter membrane. The filter cake was dried in an oven at 80°C for 48 hours and then the film was removed. The obtained graphene oxide / aramid fiber Put the 1414 nanofiber composite membrane in hydroiodic acid, react a...

Embodiment 2

[0025] In a 500 ml beaker, first add 20 ml of prepared aramid 1414 nanofibers in dimethyl sulfoxide solution (2 mg / mL), then slowly add 16.0 ml of graphene oxide in dimethyl sulfoxide solution (5 mg / ml), magnetic stirring reaction at room temperature for 30 min to obtain a flocculent precipitate of graphene oxide / aramid 1414 nanofiber composite. After the reaction, the mixed solution was separated by centrifugation (7000 rpm) in a high-speed centrifuge, and the lower layer of sediment was removed and dispersed in 20 ml of deionized water. The graphene oxide / aramid 1414 nanofiber composite filter cake was obtained by vacuum filtration with a 0.22-micron vinylidene fluoride filter membrane. The filter cake was dried in an oven at 80°C for 48 hours and then the film was removed. The obtained graphene oxide / aramid fiber Put the 1414 nanofiber composite membrane in hydroiodic acid, react at 80 °C for 2 hours, take it out after the reaction and soak it in sodium carbonate with a mas...

Embodiment 3

[0027]In a 500 ml beaker, first add 20 ml of prepared aramid 1414 nanofibers in dimethyl sulfoxide (2 mg / mL), then slowly add 24.0 ml of graphene oxide in dimethyl sulfoxide (5 mg / ml), magnetic stirring reaction at room temperature for 30 min to obtain a flocculent precipitate of graphene oxide / aramid 1414 nanofiber composite. After the reaction, the mixed solution was separated by centrifugation in a high-speed centrifuge (7000 rpm), and the lower layer of sediment was removed and dispersed in 20 ml of deionized water. After being dispersed by ultrasonication for 15 min, it was poured into a sand core filter device and used The graphene oxide / aramid fiber 1414 nanofiber composite filter cake was obtained by vacuum filtration with a 0.22 micron vinylidene fluoride filter membrane. The filter cake was dried in an oven at 80°C for 48 hours and then the film was removed. The obtained graphene oxide / aramid fiber Put the 1414 nanofiber composite membrane in hydroiodic acid, react a...

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Abstract

The invention discloses a preparation method for a graphene / aramid fibre 1414 nano-fibre composite membrane, comprising the following steps of: performing nano-fibrillation on aramid fibre 1414 yarns via the solution system of dimethyl sulfoxide and potassium hydroxide; slowly adding dimethyl sulfoxide solution for oxidizing graphene, sequentially centrifuging, dispersing, performing suction filtration and film formation, and thus obtaining oxidized graphene / aramid fibre 1414 nano-fibre composite membrane; and reducing via hydroiodic acid, washing, drying, and thus obtaining the graphene / aramid fibre 1414 nano-fibre composite membrane. The tensile strength and the Young modulus of the graphene / aramid fibre 1414 nano-fibre composite membrane obtained by the preparation method disclosed by the invention can achieve 209.4 Mpa and 29.5 GPa respectively, thus showing excellent mechanical property; simultaneously, the conductivity of the graphene / aramid fibre 1414 nano-fibre composite membrane can achieve 175 S / m, thus being excellent in conductance; and a thermogravimetric analysis shows that the graphene / aramid fibre 1414 nano-fibre composite membrane is good in heat stability.

Description

technical field [0001] The invention relates to a method for preparing a nanocomposite material, in particular, a method for preparing a graphene / aramid 1414 nanofiber composite film. Background technique [0002] Aramid 1414 is a full-para polyaramid polymerized by the condensation of p-phenylenediamine and terephthaloyl chloride (PPTA). Due to the rigidity of the molecular chain in its structure, it has lyotropic liquid crystallinity, and it is easy to form anisotropic texture under the action of shear force in the solution. Therefore, aramid 1414 can obtain high strength with particularly excellent performance when used for spinning. , High modulus fiber, the trade name is Kevlar fiber, and China is called aramid fiber 1414 fiber. Its thermal decomposition temperature is as high as 560°C, it has high heat resistance, and it also has high tensile strength and initial elastic modulus fiber strength. Therefore, aramid 1414 fibers can show more potential in composite materi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C08L77/10C08K3/04
Inventor 范金辰史子兴印杰
Owner SHANGHAI JIAO TONG UNIV
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