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TiO2 nanoparticle modified PVDF (Polyvinylidene Fluoride)/PMMA composite thin film

A composite film and nanoparticle technology, which is applied in the field of composite materials, can solve the problems of difficult surface smooth film, poor bonding performance, high price, etc., and achieve excellent mechanical properties, good bonding, and good weather resistance.

Inactive Publication Date: 2017-06-30
史晓强
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, PVDF is difficult to process, it is not easy to obtain a film with smooth surface and uniform texture, the bonding performance with other materials is poor, and the price is expensive

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach

[0014] Step 1: Dry PVDF and PMMA resins in an oven for 24 hours to remove moisture, and then mix them into a high-speed universal pulverizer at a mass ratio of PVDF:PMMA=3:7 to achieve uniform mixing;

[0015] Step 2: Dissolve a certain amount of silane coupling agent KH-570 in water-ethanol solution, and add 20g of nano-TiO after ultrasonic dispersion at room temperature 2 , heated while stirring, filtered, washed, and dried at a constant temperature for 24 hours to obtain modified nano-TiO 2 ;

[0016] Step 3: Add the PVDF and PMMA mixed powder prepared in step 1 with 4% nano-TiO 2 Use a high-speed stirrer to stir evenly, and finally add Hacker twin-screw extrusion casting to form a film to obtain TiO 2 Nanoparticle modified PVDF / PMMA composite film.

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PUM

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Abstract

The invention relates to the field of composite materials, in particular to a TiO2 nanoparticle modified PVDF (Polyvinylidene Fluoride) / PMMA composite thin film. A specific implementation scheme is that the TiO2 nanoparticle modified PVDF / PMMA composite thin film is prepared by the following steps: 1) preparing PVDF and PMMA mixed powder; 2) modifying TiO2 particles by adopting a coupling agent method; 3) uniformly mixing PVDF, PMMA and the TiO2 particles; finally, carrying out film casting. The TiO2 nanoparticle modified PVDF / PMMA composite thin film disclosed by the invention has excellent mechanical properties, good weather resistance, excellent water vapor resisting effect and hydrophobic property and relatively good cohesive property.

Description

technical field [0001] The invention relates to the field of composite materials, and the specific design relates to a TiO 2 Nanoparticle modified PVDF / PMMA composite film. Background technique [0002] Polyvinylidene fluoride has good chemical corrosion resistance, high temperature resistance, oxidation resistance, weather resistance, radiation resistance, and also has special properties such as piezoelectricity, dielectricity, and pyroelectricity, and can be used as a new type Solar back film material, which replaces polyvinyl fluoride as the back film of solar cells. However, PVDF is difficult to process, it is not easy to obtain a film with smooth surface and uniform texture, its bonding performance with other materials is poor, and it is expensive. These factors have affected the wide application of PVDF in the field of thin film materials. Adding inorganic powders and organic polymers can effectively improve the processing performance and other properties of PVDF, s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L33/12C08L27/16C08K9/06C08K3/22
CPCC08L33/12C08J5/18C08J2333/12C08J2427/16C08K2201/011
Inventor 史晓强
Owner 史晓强