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Preparation method of graphene-modified PVA composite material

A graphene modification and composite material technology, applied in the field of polyvinyl alcohol modification, can solve problems such as widening and inability to process PVA, and achieve the effects of expanding application fields, excellent barrier properties, and excellent degradability

Inactive Publication Date: 2018-07-24
朱春英
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to provide a preparation method of graphene-modified PVA composite material, which widens the distance between PVA melting point and decomposition point, realizes dry melting and plasticizing extrusion, and solves the problem of yellowing and carbonization of PVA. Problems that cannot be processed due to decomposition are beneficial to industrial production

Method used

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  • Preparation method of graphene-modified PVA composite material
  • Preparation method of graphene-modified PVA composite material
  • Preparation method of graphene-modified PVA composite material

Examples

Experimental program
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Effect test

Embodiment 1

[0034] The preparation method of the described graphene-modified PVA composite material is to use graphene as a modifying agent, carry out pre-plasticizing treatment with starch, PVA, plasticizer and auxiliary agent, and then carry out melting intercalation plasticizing extrusion, A graphene-modified PVA composite material is obtained; the temperature during the melting and intercalation plasticizing extrusion is 155±10° C.

[0035] The weight percentage of used raw material is composed as follows:

[0036]

[0037] The graphene is an oily liquid with a 6-layer benzene ring structure and a sheet diameter of 500 nm.

[0038] The degree of polymerization of the PVA is 500, the degree of alcoholysis is 75%, and the particle size of the powder is 60 mesh.

[0039] The plasticizer is a mixture of glycerol, sodium alginate, ethylenediformamide and triacetin, and the mixing mass ratio is 3:5:1:2.

[0040] The auxiliary agent is a mixture of lubricant, antioxidant and antibacteri...

Embodiment 2

[0046] The preparation method of the described graphene-modified PVA composite material is to use graphene as a modifying agent, carry out pre-plasticizing treatment with starch, PVA, plasticizer and auxiliary agent, and then carry out melting intercalation plasticizing extrusion, A graphene-modified PVA composite material is obtained; the temperature during the melting and intercalation plasticizing extrusion is 205±15° C.

[0047] The weight percentage of used raw material is composed as follows:

[0048]

[0049] The graphene is a powder having a 3-layer benzene ring structure and a sheet diameter of 450 nm.

[0050] The degree of polymerization of the PVA is 3000, the degree of alcoholysis is 99.5%, and the particle size of the powder is 65 mesh.

[0051] The plasticizer is a mixture of polyethylene glycol, triacetin, 1,4-butanediol and deionized water, and the mixing mass ratio is 2:3:6:5.

[0052] The auxiliary agent is a mixture of lubricant, antioxidant and antiba...

Embodiment 3

[0058] The preparation method of the described graphene-modified PVA composite material is to use graphene as a modifying agent, carry out pre-plasticizing treatment with starch, PVA, plasticizer and auxiliary agent, and then carry out melting intercalation plasticizing extrusion, A graphene-modified PVA composite material is obtained; the temperature during the melting and intercalation plasticizing extrusion is 180±10° C.

[0059] The weight percentage of used raw material is composed as follows:

[0060]

[0061] The graphene is an aqueous liquid having a 5-layer benzene ring structure and a sheet diameter of 300 nm.

[0062] The degree of polymerization of the PVA is 2000, the degree of alcoholysis is 82.5%, and the particle size of the powder is 60 mesh.

[0063] The plasticizer is a mixture of hexylene glycol, sodium alginate, ethylene diformamide, ethyl acetate and 1,4-butanediol, and the mixing mass ratio is 1:2:1:5:6.

[0064] The auxiliary agent is a mixture of ...

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Abstract

The invention relates to a preparation method of a graphene-modified PVA composite material, and belongs to the technical field of polyvinyl alcohol modification. The preparation method of the graphene-modified PVA composite material provided by the invention comprises the following steps: using graphene as a modifier; pre-plasticizing with starch, PVA, a plasticizer and additives; then performingmelt intercalation plasticizing extrusion to obtain the graphene-modified PVA composite material, wherein the temperature for melt intercalation plasticizing extrusion is 145-220 DEG C. According tothe preparation method of the graphene-modified PVA composite material provided by the invention, a distance between a melting point and a decomposing point of the PVA is broadened, dry melt plasticizing extrusion is realized, a problem that the PVA cannot be processed due to yellowing and carbonization decomposition is solved, and industrial production is facilitated.

Description

technical field [0001] The invention relates to a preparation method of a graphene-modified PVA composite material, belonging to the technical field of polyvinyl alcohol modification. Background technique [0002] With the progress of society, human beings' awareness of environmentally friendly materials is gradually increasing. How to functionalize materials, prepare new materials that can be digested by the environment, eliminate white pollution caused by non-degradable plastics, improve material performance while making materials lightweight and save a lot of resources, etc., are all the research and development directions of technicians. [0003] At present, the output of PVA has reached 5 million tons, which is about 90% of the global production capacity. Excess production capacity has brought enormous pressure to enterprises. Modifying PVA so that it can be melted and plasticized for extrusion is the key to the development of this new material application. There are ...

Claims

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Application Information

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IPC IPC(8): C08L3/02C08L29/04C08L5/04C08L71/02C08K13/04C08K7/00C08K3/04C08K5/053C08K5/098C08K5/20C08K5/134C08K3/38C08K3/22C08J3/20
CPCC08J3/20C08J3/203C08J2303/02C08J2329/04C08J2403/02C08J2429/04C08K2003/2241C08K2201/011C08L3/02C08L29/04C08L2201/06C08L2201/10C08L2205/03C08L2205/035C08L5/04C08L71/02C08K13/04C08K7/00C08K3/04C08K5/053C08K5/098C08K5/20C08K5/1345C08K3/38C08K5/526C08K3/22
Inventor 朱春英
Owner 朱春英
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