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Polyformaldehyde composite material and preparation method thereof

A composite material, polyoxymethylene technology, applied in the preparation of polyoxymethylene composite materials, high thermal conductivity and wear-resistant polyoxymethylene composite materials field, can solve the problems of expensive foam aluminum, interface defects of injection molded products, limited application, etc., to achieve balanced performance, The preparation process is easy to realize and the effect of reducing production cost

Active Publication Date: 2019-01-11
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] However, due to the high price of foamed aluminum, the thermal expansion coefficient of aluminum and POM is 4.4 times different, and injection molded products are prone to interface defects, which limits further application in actual production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Prepare the polyoxymethylene composite as follows:

[0043] Evenly mix nano-alumina with KH-550 coupling agent with a total mass of 3wt% of nano-alumina, treat the surface of nano-alumina, and dry at 100°C after treatment;

[0044] Evenly mix micron alumina with KH-550 coupling agent with a total mass of 3wt% of micron alumina, treat the surface of micron alumina, and dry at 100°C after treatment;

[0045] Disperse 0.3 parts by mass of sulfonated graphene in deionized water using an ultrasonic dispersing device to prepare a 0.01 g / mL aqueous solution of sulfonated graphene; disperse 3 parts by mass of nano-alumina treated with a coupling agent using an ultrasonic dispersing device Slowly add the sulfonated graphene solution to the nano-alumina dispersion in deionized water under stirring, stop stirring after the addition is complete, filter the liquid after layering, bake the filter residue at 90°C for 6 hours, and dry Afterwards, the sulfonated graphene / nano-alumina c...

Embodiment 2

[0048] Prepare the polyoxymethylene composite as follows:

[0049] Evenly mix nano-alumina with KH-570 coupling agent with a total mass of 2.5wt% of nano-alumina, treat the surface of nano-alumina, and dry at 100°C after treatment;

[0050] Evenly mix micron alumina and KH-570 coupling agent with a total mass of 2.5wt% of micron alumina, treat the surface of micron alumina, and dry at 100°C after treatment;

[0051] Disperse 0.7 parts by mass of sulfonated graphene in deionized water using an ultrasonic dispersing device to prepare a 0.01 g / mL aqueous solution of sulfonated graphene; disperse 8 parts by mass of nano-alumina treated with a coupling agent using an ultrasonic dispersing device Slowly add the sulfonated graphene solution to the nano-alumina dispersion in deionized water under stirring, stop stirring after the addition is complete, filter the liquid after layering, bake the filter residue at 90°C for 6 hours, and dry Afterwards, the sulfonated graphene / nano-alumin...

Embodiment 3

[0054] Prepare the polyoxymethylene composite as follows:

[0055] Evenly mix nano-alumina with KH-550 coupling agent with a total mass of 2wt% of nano-alumina, treat the surface of nano-alumina, and dry at 100°C after treatment;

[0056] Evenly mix micron alumina with KH-550 coupling agent with a total mass of 2wt% of micron alumina, treat the surface of micron alumina, and dry at 100°C after treatment;

[0057] Disperse 1 mass part of sulfonated graphene in deionized water for 2 hours using an ultrasonic dispersion device to prepare a 0.01 g / mL aqueous solution of sulfonated graphene; 10 mass parts of nano-alumina treated with a coupling agent are dispersed using an ultrasonic dispersion device Disperse in deionized water, slowly add the sulfonated graphene solution to the nano-alumina dispersion under stirring, stop stirring after the addition is complete, filter after the liquid is layered, bake the filter residue at 90°C for 6h, and dry After drying, the sulfonated graph...

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Abstract

The invention relates to a polyformaldehyde composite material and a preparation method thereof. The preparation method comprises the following steps: respectively uniformly stirring nanometer aluminum oxide, micron aluminum oxide and 2wt%-3wt% of coupling agent, treating the surfaces of nanometer aluminum oxide and micron aluminum oxide, and then drying after treating; preparing 0.3-1 part by weight of sulfonated graphene into a sulfonated graphene aqueous solution; dispersing 3-10 parts by weight of nanometer aluminum oxide treated with the coupling agent into deionized water, dropwise adding the sulfonated graphene solution into a nanometer aluminum oxide dispersion liquid under stirring state, stopping stirring after the ending of dropwise adding, filtering after the layering of liquid, and drying filter residue, thereby acquiring a sulfonated graphene / nanometer aluminum oxide compound; mixing 80-93 parts by weight of polyformaldehyde, 3-7 parts by weight of sulfonated graphene / nanometer aluminum oxide compound, parts by 3.5-9 weight of micron aluminum oxide treated with the coupling agent and a defined amount of additives, and then drying; mixing for 3-4 hours in a blender mixer; extruding, chopping and drying after mixing, thereby acquiring the polyformaldehyde composite material.

Description

technical field [0001] The invention relates to the technical field of new materials, in particular to a polyoxymethylene composite material with high thermal conductivity and wear resistance; the invention also relates to a preparation method of the polyoxymethylene composite material. Background technique [0002] POM (Polyformaldehyde, POM for short) is a linear thermoplastic resin with high density and high crystallinity. The molecular chain of the substance has great flexibility, high chain structure regularity, high crystallinity, and strong crystallization ability, so it has excellent properties such as self-lubrication, chemical corrosion resistance, friction resistance, fatigue resistance, high strength, and easy processing. It is one of the earliest engineering plastics used as gears. It is used to replace non-ferrous metals and alloys and is widely used in machinery manufacturing, automobiles, electronic and electrical industries, and various precision machinery i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L59/00C08L27/18C08K9/06C08K3/22C08K3/04
CPCC08K2003/2227C08K2201/003C08K2201/011C08L59/00C08L27/18C08K9/06C08K3/22C08K3/042
Inventor 龙春光董佩冉刘成河
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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