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High-performance graphene composite polyvinyl alcohol fiber and its preparation method and application

A polyvinyl alcohol fiber and graphene composite technology, applied in the direction of fiber chemical characteristics, single-component synthetic polymer rayon, rayon manufacturing, etc. Functional requirements, etc.

Active Publication Date: 2020-02-04
JINAN SHENGQUAN GROUP SHARE HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the strength and toughness of the modified PVA prepared by this patent are mediocre and need to be further improved, and it does not have other excellent properties such as antistatic performance, which cannot meet the requirements of modern people for the multifunctionality of the material itself.

Method used

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  • High-performance graphene composite polyvinyl alcohol fiber and its preparation method and application
  • High-performance graphene composite polyvinyl alcohol fiber and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0044] The preparation method of the high-performance graphene composite polyvinyl alcohol fiber is as follows:

[0045] 1) Add graphene oxide in water, and ultrasonically disperse to obtain a stable dispersion. The suspension is centrifuged for the first time at 2000rpm, and the centrifugation time is 20min to remove the bottom sediment. The supernatant is centrifuged for the second time at 5000rpm. , the centrifugation time is 10min to obtain the secondary bottom precipitation, and the secondary bottom precipitation is added with water and ultrasonic to obtain 1.5wt% graded graphene oxide sol solution (sheet diameter distribution is D90: ~ 25 μm);

[0046] 2) The graphene oxide sol solution with a concentration of 1.5wt% and the PVA aqueous solution with a concentration of 5wt% are premixed (the degree of polymerization is 1700, and the degree of alcoholysis is 99%) to obtain a premix, and the premix is ​​mixed with 10wt% % PVA aqueous solution is mixed again (polymerization...

Embodiment 2

[0049] The difference from Example 1 is that in step 1), the bottom sediment obtained by the first centrifugation at 3000rpm is selected, and water is added for ultrasonication to obtain a 2wt% graded graphene oxide sol solution (distribution of sheet diameter is D90: ~ 30 μm), and the obtained In the spinning dope, the concentration of the reducing agent is 3 wt%, and the concentration of PVA is 16 wt%, and finally a graphene-composite polyvinyl alcohol fiber with a graphene oxide content of 1.5 wt% is obtained.

Embodiment 3

[0051] The difference from Example 1 is that in step 1), the secondary supernatant after the supernatant is centrifuged again at a speed of 7000rpm is selected to prepare a 3wt% graded graphene oxide sol (sheet diameter distribution is D90: ~ 5 μm), in the spinning stock solution that obtains, the concentration of reducing agent is 2wt%, and the concentration of PVA is 15wt%, finally obtains the graphene composite polyvinyl alcohol fiber that graphene oxide content is 1.5wt%.

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Abstract

The invention provides a preparation method of a high-performance graphene composite polyvinyl alcohol fiber. The preparation method comprises the following steps of pretreating a graphene substance water solution to obtain a graphene substance graded water solution, wherein a D90 index of a graphene substance is controlled to be 70mu m or lower; mixing and stirring a PVA (Polyvinyl Acetate) water solution, boric acid and the graphene substance graded water solution to obtain a boric acid-contained spinning solution with PVA concentration being 10 to 20 weight percent; filtering the spinning solution, defoaming, spinning and drying to obtain the high-performance graphene composite polyvinyl alcohol fiber. The high-performance graphene composite polyvinyl alcohol fiber prepared by adopting the preparation method is widely applied in a building industry and a transportation industry. Indexes such as the tensile strength, the tensile modulus and the elongation at break of the composite fiber are qualitatively improved, and higher tenacity, hot water resistance and antistatic property are additionally endowed to a fiber material.

Description

technical field [0001] The invention relates to the field of processing and preparation of polyvinyl alcohol fibers, in particular to a high-performance graphene composite polyvinyl alcohol fiber and its preparation method and application. Background technique [0002] Polyvinyl alcohol (PVA) is a water-soluble polymer with the molecular formula [C 2 h 4 O]n. Due to its good hydrophilicity, impact resistance and good dispersibility in molding processing, polyvinyl alcohol fiber can be used as a reinforcing material for plastics, cement and ceramics, and can also replace carcinogenic asbestos. [0003] Graphene is a two-dimensional material with a honeycomb structure composed of a single layer of sp2 hybridized carbon atoms, which has many excellent properties. Since its discovery in 2004, graphene has become a research hotspot in the scientific community. While studying the physical and chemical properties of graphene, composite materials related to graphene are emerging...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/50D01F1/09D01F1/10
CPCD01F1/09D01F1/10D01F6/50
Inventor 唐一林张金柱张安王文平刘顶
Owner JINAN SHENGQUAN GROUP SHARE HLDG
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