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Preparation method of graphene ultra-high molecular weight polyethylene hybrid fiber

An ultra-high molecular weight, hybrid fiber technology, applied in the field of high-performance fiber preparation, can solve the problems of reducing the collective strength of fibers, easy creep and heat resistance of fibers, etc., and achieve good lipophilicity, high fiber matrix strength, and improved stress concentration. Effect

Inactive Publication Date: 2016-04-13
QINGDAO UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art, design and propose a preparation method of graphene ultra-high molecular weight polyethylene hybrid fibers, to solve the problems of easy creep and poor heat resistance of fibers under stress; overcome filling Matters become stress concentration points and reduce the collective strength of fibers; improve the lack of graphene agglomeration, and enhance the role of graphene in composite fibers

Method used

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  • Preparation method of graphene ultra-high molecular weight polyethylene hybrid fiber

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Embodiment 1

[0014] The preparation process steps of the graphene ultra-high molecular weight polyethylene hybrid fiber involved in this embodiment include: graphene (or graphene oxide) lipophilic modification, lipophilic modified graphene dispersion liquid and ultra-high molecular weight polyethylene paraffin oily Three process steps for preparing graphene-reinforced ultra-high molecular weight polyethylene hybrid fibers by spinning solution blending and gel wet spinning:

[0015] (1) Graphene (or graphene oxide) lipophilic modification: the graphene or graphene oxide raw material is uniformly dispersed in the ethanol solution first to prepare graphene or graphene oxide with a concentration of 0.1-10% by weight of graphite Graphene or graphene oxide ethanol dispersion; then graphene or graphene oxide ethanol dispersion is added to the lipophilic modifier (oleylamine or oleic acid) in a weight ratio (1:10—10:1) for blending Obtain a blended solution; then, control the temperature of the bl...

Embodiment 2

[0020] The present embodiment is prepared according to the process steps of Example 1, wherein the raw material adopts graphene powder, and the graphene ethanol dispersion in step (1) has a weight percentage concentration of 1%, and the graphene ethanol dispersion and lipophilic modifier oil Amines are blended at a weight ratio of 1:1 to obtain a blended solution, and the blended solution is subjected to lipophilic grafting modification at a high temperature of 90°C, and the prepared lipophilic modified graphene dispersion has a weight percentage concentration of 0.5% ; The lateral size of the graphene is 5 microns, and the thickness is 10 nanometers;

[0021] In step (2), the antioxidant butyl hydroxyanisole and ultra-high molecular weight polyethylene with a molecular weight of 2 million are added in a ratio of 1:1000 to a dissolution kettle filled with paraffin wax, and the temperature is raised to 100° C. The molecular weight polyethylene is completely swollen; the lipophi...

Embodiment 3

[0024] This example is prepared according to the process steps of Example 1, wherein the raw material is graphene oxide powder, and other parameters are the same as those of Example 2.

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Abstract

The invention belongs to the technical field of high-performance fiber preparation and relates to a preparation method of a graphene ultra-high molecular weight polyethylene hybrid fiber. The preparation method comprises three technological steps of graphene (or oxidized graphene) lipophilic modification, oleophilic modified graphene dispersion liquid and ultra-high molecular weight polyethylene paraffin oil spinning solution co-mixing and gel wet spinning, and particularly comprises the following steps: dispersing graphene or oxidized graphene in an ethanol solution; adding an oleophilic modifier for co-mixing; performing oleophilic graft modification; adding an antioxidant and ultra-high molecular weight polyethylene into paraffin to prepare an ultra-high molecular weight polyethylene paraffin oil spinning solution; co-mixing an oleophilic modified graphene dispersion liquid and the ultra-high molecular weight polyethylene paraffin oil spinning solution. The prepared fiber is high in matrix strength, has the mechanical properties of creep resistance, good heat resistance, improved stress concentration and the like; the preparation method is simple, convenient to operate and wide in application.

Description

Technical field: [0001] The invention belongs to the technical field of high-performance fiber preparation, and relates to a preparation method of graphene ultra-high molecular weight polyethylene hybrid fiber, in particular to a graphene dispersion liquid modified by lipophilic grafting and ultra-high molecular weight polyethylene paraffin A method for preparing hybrid fibers by blending oily spinning solutions. Background technique: [0002] Ultra-high molecular weight polyethylene fiber refers to a high-performance fiber that uses ultra-high molecular weight polyethylene with a molecular weight of more than 1 million as a raw material and is coagulated into silk by gel wet spinning. This type of fiber has highly oriented macromolecular chains and crystallinity of extended chains, has super strong physical and mechanical properties, and has excellent properties such as UV resistance, impact resistance and seawater corrosion resistance. It is used in aerospace, military saf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F1/10D01F6/46C08L23/06C08L91/06C08K9/04C08K3/04
CPCD01F1/10C08L23/06C08L2201/08C08L2207/068D01F6/46C08L91/06C08K9/04C08K3/04
Inventor 曲丽君田明伟朱士凤周卉卉陈国华孙亚宁
Owner QINGDAO UNIV
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