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Preparation method of high-strength and high-modulus polyvinyl alcohol-graphene nano composite fibers

A nano-composite fiber, polyvinyl alcohol technology, applied in fiber processing, fiber chemical characteristics, spinning solution preparation and other directions, can solve the problems of low price, high specific work at break, good adhesion, etc. The effect of improving crystallinity and orientation

Inactive Publication Date: 2015-02-04
NANTONG QIANGSHENG GRAPHENE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the tensile strength and modulus of high-strength PVA fibers are not as good as Kevlar, UHMW-PE fibers, etc., they have large specific work at break, good adhesion, and low prices, and may partially replace them in protective composite materials. Kevlar fiber etc.

Method used

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  • Preparation method of high-strength and high-modulus polyvinyl alcohol-graphene nano composite fibers
  • Preparation method of high-strength and high-modulus polyvinyl alcohol-graphene nano composite fibers
  • Preparation method of high-strength and high-modulus polyvinyl alcohol-graphene nano composite fibers

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] This embodiment relates to a method for preparing high-strength and high-modulus polyvinyl alcohol-graphene nanocomposite fibers. After graphene and polyvinyl alcohol are uniformly mixed in a mixed solvent, they are spun by a gel spinning method with high heat Stretching to obtain high-strength and high-modulus polyvinyl alcohol-graphene nanocomposite fiber. It includes the following steps:

[0027] (1) Add graphene oxide to a mixed solvent composed of dimethyl sulfoxide and water with a weight ratio of 90:10, ultrasonically disperse for 3 hours, and then add polyvinyl alcohol (polymerization degree 2488±50, alcoholysis degree 95% ), the dissolution temperature is 100°C; the spinning dope is formed. The weight percentage concentration of polyvinyl alcohol in the spinning dope is 15%, and the weight percentage of graphene oxide is 1% of the weight of the polyvinyl alcohol matrix.

[0028] (2) After filtering and vacuum degassing the prepared spinning solution at a temperatu...

Embodiment 2

[0032] This embodiment relates to a method for preparing high-strength and high-modulus polyvinyl alcohol-graphene nanocomposite fibers. After graphene and polyvinyl alcohol are uniformly mixed in a mixed solvent, they are spun by a gel spinning method with high heat Stretching to obtain high-strength and high-modulus polyvinyl alcohol-graphene nanocomposite fiber. It includes the following steps:

[0033] (1) Add modified graphene to a mixed solvent composed of ethylene glycol and water with a weight ratio of 95:5, ultrasonically disperse for 1 hour, and then add polyvinyl alcohol (polymerization degree 1750±50, alcoholysis degree 80%) , The dissolution temperature is 50°C; the spinning dope is formed. The weight percentage concentration of polyvinyl alcohol in the spinning dope is 10%, and the weight percentage of graphene oxide is 10% of the weight of the polyvinyl alcohol matrix.

[0034] (2) After filtering the prepared spinning dope at a temperature of 80°C and leaving it t...

Embodiment 3

[0038] This embodiment relates to a method for preparing high-strength and high-modulus polyvinyl alcohol-graphene nanocomposite fibers. After graphene and polyvinyl alcohol are uniformly mixed in a mixed solvent, they are spun by a gel spinning method with high heat Stretching to obtain high-strength and high-modulus polyvinyl alcohol-graphene nanocomposite fiber. It includes the following steps:

[0039] (1) Add electrochemically stripped graphene to a mixed solvent consisting of tetrahydrofuran, n-butanol and water with a weight ratio of 70:30, ultrasonically disperse for 6 hours, and then add polyvinyl alcohol (polymerization degree 2488±50, alcoholysis degree 95%), the dissolution temperature is 120°C; the spinning dope is formed. The weight percentage concentration of polyvinyl alcohol in the spinning dope is 25%, and the weight percentage of graphene oxide is 0.1% of the weight of the polyvinyl alcohol matrix.

[0040] (2) After filtering and vacuum degassing the prepared ...

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Abstract

The invention discloses a preparation method of high-strength and high-modulus polyvinyl alcohol-graphene nano composite fibers. The preparation method comprises the following steps: uniformly mixing graphene and polyvinyl alcohol in a mixed solvent; spinning by a gel spinning method; and carrying out high-power thermal stretching to obtain the high-strength and high-modulus polyvinyl alcohol-graphene nano composite fibers. According to the preparation method, raw materials are cheap, the production process is simple and the industrial large-scale production is easy to realize. According to the prepared polyvinyl alcohol-graphene nano composite fibers, the tensile strength is 1.4GPa-2.2GPa, the Young modulus is 36GPa and the elongation at break is 10%; the surfaces of the fibers are smooth and the sections of the fibers are round; and the requirements on high-strength and high-modulus polyvinyl alcohol fibers in special fields and the fields of constructions and industries can be met.

Description

Technical field [0001] The invention relates to a method for preparing high-strength and high-modulus polyvinyl alcohol-graphene nano composite fiber. Background technique [0002] High-strength polyvinyl alcohol (PVA) fiber has good hydrophilicity, cohesiveness, impact resistance and easy dispersion during processing, so it is used as a reinforcing material in cement, asbestos sheets, ceramic building materials and polymer-based composite materials. There are many applications in this regard. Reinforced concrete and building materials with high-strength PVA fibers can effectively improve the material's impact resistance, elastic fatigue resistance and anti-cracking properties. The geotextile made of high-strength PVA fiber has high tensile strength, good creep resistance, abrasion resistance, chemical corrosion resistance, microbe resistance and excellent water conductivity. It can be used for reinforcement, isolation, protection and drainage in engineering construction. It ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/12D01F6/14D01D5/06D01D1/10D01D5/12D01D10/02D01F11/14
CPCD01D1/02D01D5/06D01D10/02D01F6/14D01F9/12
Inventor 拜永孝胡新军沙晓林沙嫣
Owner NANTONG QIANGSHENG GRAPHENE TECH CO LTD
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