A kind of high mechanical strength aramid fiber nanofiber hybrid film and preparation method thereof

A nanofiber and aramid fiber technology is applied in the field of aramid fiber hybrid film and its preparation, which can solve problems such as the reduction of elongation at break, and achieve the effects of increasing the elongation at break, improving mechanical and mechanical properties, and promoting structural reorganization.

Active Publication Date: 2021-10-22
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The tensile strength of this film material is increased by 350% relative to the pure reduced graphene oxide film, however, it is not improved compared with the aramid nanofiber film, and the elongation at break is reduced by 60%

Method used

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  • A kind of high mechanical strength aramid fiber nanofiber hybrid film and preparation method thereof
  • A kind of high mechanical strength aramid fiber nanofiber hybrid film and preparation method thereof
  • A kind of high mechanical strength aramid fiber nanofiber hybrid film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1 g of aramid fiber yarn and 1.5 g of potassium hydroxide were weighed and put into a reactor, DMSO solution was added, and stirred at a temperature of 25° C. for 7 days to obtain an aramid nanofiber solution.

[0027] Weigh 3g of graphite powder and 18g of potassium permanganate into the reactor, slowly add mixed acid (concentrated sulfuric acid: 360mL, concentrated phosphoric acid: 40mL), and stir until uniform. The reaction system was transferred to a water bath, and stirred at a constant temperature of 50° C. for 12 h. Subsequently, the reaction solution was poured onto 400 mL of ice, stirring was continued, and hydrogen peroxide (30 wt.%) was added dropwise until the reaction solution turned bright yellow. The reaction solution was filtered while hot and washed with 1:10 dilute hydrochloric acid. The product was subjected to high-speed centrifugation and repeated water washing until it was close to neutral, and was ultrasonically treated for more than 1 hour with ...

Embodiment 2

[0030] 1 g of aramid fiber yarn and 1.5 g of potassium hydroxide were weighed and put into a reactor, DMSO solution was added, and stirred at a temperature of 25° C. for 7 days to obtain an aramid nanofiber solution.

[0031] Weigh 3g of graphite powder and 18g of potassium permanganate into the reactor, slowly add mixed acid (concentrated sulfuric acid: 360mL, concentrated phosphoric acid: 40mL), and stir until uniform. The reaction system was transferred to a water bath, and stirred at a constant temperature of 50° C. for 12 h. Subsequently, the reaction solution was poured onto 400 mL of ice, stirring was continued, and hydrogen peroxide (30 wt.%) was added dropwise until the reaction solution turned bright yellow. The reaction solution was filtered while hot and washed with 1:10 dilute hydrochloric acid. The product was subjected to high-speed centrifugation and repeated water washing until it was close to neutral, and was ultrasonically treated for more than 1 hour with ...

Embodiment 3

[0034] 1 g of aramid fiber yarn and 1.5 g of potassium hydroxide were weighed and put into a reactor, DMSO solution was added, and stirred at a temperature of 25° C. for 7 days to obtain an aramid nanofiber solution.

[0035] Weigh 3g of graphite powder and 18g of potassium permanganate into the reactor, slowly add mixed acid (concentrated sulfuric acid: 360mL, concentrated phosphoric acid: 40mL), and stir until uniform. The reaction system was transferred to a water bath, and stirred at a constant temperature of 50° C. for 12 h. Subsequently, the reaction solution was poured onto 400 mL of ice, stirring was continued, and hydrogen peroxide (30 wt.%) was added dropwise until the reaction solution turned bright yellow. The reaction solution was filtered while hot and washed with 1:10 dilute hydrochloric acid. The product was subjected to high-speed centrifugation and repeated water washing until it was close to neutral, and was ultrasonically treated for more than 1 hour with ...

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Abstract

The invention discloses an aramid nanofiber hybrid film with high mechanical strength and a preparation method thereof. The film comprises the following components in parts by mass: 100 parts of aramid nanofiber and 3-15 parts of graphene oxide. The invention utilizes the hydration protonation effect to promote the structural recombination of aramid nanofibers, and at the same time induces the ordered gelation self-assembly of nanofibers, and conveniently regulates the thickness of the film material; the one-dimensional graphene oxide reinforcement phase is used to fill the one-dimensional The nanofiber matrix can effectively take advantage of the interface compatibility between phase components and greatly improve the mechanical properties of the aramid fiber composite film material.

Description

technical field [0001] The invention belongs to the technical field of fiber polymer composite material preparation, in particular to an aramid fiber hybrid film with high mechanical properties and a preparation method thereof. Background technique [0002] Polymer composite film is a kind of polymer composite material. Compared with the material of macroscopic three-dimensional size, polymer [0003] Composite thin films can maintain the properties of bulk materials and have anisotropy in the two-dimensional direction. They are widely used in capacitors, bio-diafiltration, photoelectric properties, and anti-corrosion and heat insulation. In order to adapt to the actual harsh application environment and improve the service life, it is of great practical value to prepare polymer films with high mechanical properties by simple and efficient synthesis methods. [0004] Polyparaphenylene terephthalamide (PPTA) is a high-performance para-aramid fiber, the basic repeating unit is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/18C08L77/10C08K3/04
CPCC08J5/18C08J2377/10C08K3/042
Inventor 贾红兵尹清张旭敏姜宽章婉琪涂晶
Owner NANJING UNIV OF SCI & TECH
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