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Method for preparing graphene/silica nanocomposite fiber through coaxial electrostatic spinning

A nanocomposite fiber and coaxial electrospinning technology, which is applied in fiber processing, filament/wire forming, fiber chemical characteristics, etc., can solve the problems of graphene dispersion and synergistic effect, and achieve diameter Small, conducive to industrial scale-up, and the effect of improving comprehensive performance

Active Publication Date: 2017-05-10
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if graphene and silica fibers are simply blended and prepared, the dispersion problem of graphene still cannot be solved, and the two cannot have a synergistic effect

Method used

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  • Method for preparing graphene/silica nanocomposite fiber through coaxial electrostatic spinning
  • Method for preparing graphene/silica nanocomposite fiber through coaxial electrostatic spinning
  • Method for preparing graphene/silica nanocomposite fiber through coaxial electrostatic spinning

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Outer layer solution

[0022] Weigh 1.5g of graphite oxide, dissolve it in 100mL deionized water and ultrasonically treat it to obtain a graphene oxide dispersion; weigh 35.0g of PVP and 12.5g of DMSO, mix and stir evenly; mix the above two solutions, and stir under a magnetic stirrer 3h, to obtain the outer layer spinning solution.

[0023] (2) inner layer solution

[0024] Weigh 25.0g of TEOS, 8.2g of absolute ethanol, 15g of dilute hydrochloric acid with a concentration of 2.0mol / L, mix and stir evenly; weigh 5.0g of PVP, DMF18.0g, mix and stir evenly; mix the above two solutions, Stir for 8 hours under a magnetic stirrer to obtain an inner layer spinning solution.

[0025] (3) Coaxial electrospinning was performed using a spinning device consisting of a high-voltage power supply and a syringe pump. The parameters of the spinning equipment are as follows: the propulsion rate of the inner layer solution is 1.0mL / h, and the inner diameter of the spinneret is 0.7...

Embodiment 2

[0028] (1) Outer layer solution

[0029] Weigh 0.1g of graphene, dissolve it in 50mL of deionized water and 10mL of absolute ethanol, and obtain a graphene dispersion by ultrasonic treatment; weigh 1.2g of PLA, 4.0g of THF, and 0.8g of DMSO, mix and stir evenly; mix the above two solutions Mix and stir for 1 h to obtain the outer layer spinning solution.

[0030] (2) inner layer solution

[0031] Weigh 80.0g of TEOS, 1.8g of absolute ethanol, 3.6g of dilute hydrochloric acid with a substance concentration of 1.2mol / L, mix and stir evenly; weigh 1.8g of PLA, THF 6.5g, 0.5g of DMSO, mix and stir evenly; The two solutions were mixed and magnetically stirred for 3 hours to obtain the inner layer spinning solution.

[0032] (3) The propulsion rate of the inner layer solution is set to be 1.6mL / h, and the inner diameter of the spinneret is 0.8mm; the propulsion rate of the outer layer solution is 4.2ml / h, and the inner diameter of the spinneret is 1.5mm; the driving voltage is 20k...

Embodiment 3

[0035] (1) Outer layer solution

[0036]Weigh 5.0g of graphite oxide, dissolve it in 80mL of deionized water and 10mL of absolute ethanol, and obtain a graphene oxide dispersion by ultrasonic treatment; weigh 1.5g of PMA, 5.0g of THF, and 0.9g of DMF, and mix and stir evenly; The solutions were mixed and magnetically stirred for 3 hours to obtain the outer layer spinning solution.

[0037] (2) inner layer solution

[0038] Weigh 5.0g of TMOS, 0.5g of absolute ethanol, 2.0g of dilute hydrochloric acid with a substance concentration of 0.5mol / L, mix and stir evenly; weigh 2.0g of PMA, THF 4.6g, DMF 1.0g, mix and stir evenly; The two solutions were mixed and magnetically stirred for 2 hours to obtain the inner layer spinning solution.

[0039] (3) The propulsion rate of the inner layer solution is set to 0.8ml / h, and the inner diameter of the spinneret is 0.6mm; the propulsion rate of the outer layer solution is 1.4ml / h, and the inner diameter of the spinneret is 1.0mm; the dri...

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Abstract

The invention discloses a method for preparing graphene / silica nanocomposite fiber through coaxial electrostatic spinning and belongs to the technical field of graphene. The graphene (outer layer) / silica (inner layer) nanocomposite fiber is prepared with a coaxial electrostatic spinning technology in the sol-gel principle. The novel nanocomposite fiber is applied to the field of rubber. The enhancement effect of graphene and silica fiber can be exerted, gathering of graphene can be avoided, and the end effect of the silica fiber can be reduced. The composite fiber can effectively enhance rubber, improve the fatigue resistance and reduce heat generation and the like. Besides, the method has the advantages that equipment is simple, the operation is simple, the controllability is good, industrial amplification is facilitated and the like.

Description

technical field [0001] The invention belongs to the technical field of graphene, and in particular relates to a method for preparing graphene / silicon dioxide nanocomposite fibers by coaxial electrospinning. Background technique [0002] Graphene is a new type of carbon nanomaterial. Because of its unique two-dimensional sheet structure and excellent performance, it has become a research hotspot in various fields in recent years. In rubber applications, graphene is widely used as a reinforcement material for rubber composites. According to current research reports, adding a small amount of graphene to various rubber matrices can effectively improve the physical and mechanical properties, electrical and thermal conductivity, and gas barrier properties of rubber composites. However, due to the strong van der Waals interaction between graphene sheets, which are easy to stack, it is difficult to disperse uniformly in the rubber matrix, so the amount of graphene is difficult to a...

Claims

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Application Information

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IPC IPC(8): D01F8/18D01D5/00D01D5/30
CPCD01D5/0015D01D5/30D01F8/18
Inventor 温世鹏郑龙涂菁琬刘力
Owner BEIJING UNIV OF CHEM TECH
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