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Preparation method of highly-wear-resistant CNF/PMMA composite material

A composite material and high wear resistance technology, which is applied in the field of polymethyl methacrylate composite material and its preparation, can solve the problems of poor friction resistance of cellulose nanofibrils, etc. Influence, the effect of improving wear resistance

Inactive Publication Date: 2019-08-02
TIANJIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem mainly solved by the present invention is: aiming at the problem that cellulose nanofibrils are difficult to disperse evenly in the matrix and the prepared CNF / PMMA composite material has poor friction resistance in the current preparation method of CNF / PMMA composite material, a method is proposed. Preparation method of high wear resistance CNF / PMMA composite material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] 300 parts by mass of 2.5% cellulose nanofibril hydrogel were treated with liquid nitrogen and freeze-dried for 48 hours to obtain CNF airgel. Dissolve 6 parts by mass of CNF airgel and 4 parts by mass of PMMA in 100 parts by mass of acetone to obtain CNF acetone solution and PMMA acetone solution, mix and stir them for 5 minutes to volatilize the acetone solvent, dry and pulverize to obtain high cellulose nano Composite material masterbatch with added amount of fibril. 10 parts by mass of composite material masterbatch and 35 parts by mass of PMMA particles are added to a melt extruder, and melted and extruded at 180 ° C to finally obtain a high wear resistance cellulose nanofibril / polymethyl methacrylate composite material;

Embodiment 2

[0020] 600 mass parts of 2% cellulose nanofibril hydrogel were treated with liquid nitrogen and freeze-dried for 48 hours to obtain CNF airgel. Dissolve 12 parts by mass of CNF airgel and 7 parts by mass of PMMA in 250 parts by mass of acetone to obtain CNF acetone solution and PMMA acetone solution, mix and stir them for 10 minutes to make the acetone solvent volatilize, dry and pulverize to obtain high cellulose nano Composite material masterbatch with added amount of fibril. Add 20 parts by mass of composite material masterbatch and 50 parts by mass of PMMA particles into a melt extruder, and melt extrude at 180°C to finally obtain a high wear resistance cellulose nanofibril / polymethyl methacrylate composite material.

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Abstract

The invention discloses a preparation method of a highly-wear resistant CNF / PMMA composite material. The preparation method is basically characterized by comprising the following steps: pre-coating cellulose nano-filaments as a matrix in PMMA at a higher concentration, preparing composite material master batches and then preparing the master batches and the PMMA into the highly-wear-resistant CNF / PMMA composite material through a melt extrusion method according to a certain proportion. By utilizing the cellulose nano-filaments as a reinforcing phase, the wear resistance of the PMMA composite material can be significantly improved under the premise that the light transmittance is not affected; the obtained highly-wear-resistant CNF / PMMA composite material has potential applications in the fields of electronic screens, aerospace non-structural materials and the like.

Description

technical field [0001] The invention relates to a polymethyl methacrylate composite material and a preparation method thereof, in particular to a preparation method of a high wear resistance CNF / PMMA composite material. Background technique [0002] As a kind of thermoplastic composite material, polymethyl methacrylate (PMMA) is widely used in aviation, automobile, electronics, building materials and advertising because of its excellent light transmission, weather resistance, light weight, low price and easy molding. Signage and other industries, but due to its low surface hardness, easy to brush and poor friction resistance, which affects its light transmission and gloss, seriously restricts its development and application. In order to expand the application range of PMMA, improving its wear resistance is a more important research direction. Among them, the related research of adding nanoparticles to polymethyl methacrylate to modify it has attracted extensive attention of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L33/12C08L1/02C08J3/22C08J9/28
CPCC08J3/226C08J9/28C08J2301/02C08J2333/12C08J2401/02C08J2433/12
Inventor 李群邹杨王徵张世超
Owner TIANJIN UNIV OF SCI & TECH
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