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Polytrifluorochloroethylene film as well as preparation method and application thereof

A polychlorotrifluoroethylene and film technology, which is applied in the field of polychlorotrifluoroethylene film preparation, can solve the problems of unobtainable performance and excellent film products, and achieve the effect of maintaining performance advantages and avoiding degradation

Active Publication Date: 2021-10-01
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The existing domestic PCTFE film preparation methods are usually matched with specially designed molding machines. Simply using conventional polymer molding processing equipment cannot obtain film products with excellent performance.

Method used

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  • Polytrifluorochloroethylene film as well as preparation method and application thereof
  • Polytrifluorochloroethylene film as well as preparation method and application thereof

Examples

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preparation example Construction

[0044] In view of this, the present application creatively proposes a method for preparing a polychlorotrifluoroethylene film, which mainly includes the following steps: the polychlorotrifluoroethylene suspension obtained after dispersing polychlorotrifluoroethylene in a mixed dispersion medium is supported on The surface of the substrate material is dried, sintered, and the substrate material is subsequently removed.

[0045] The method is to prepare the PCTFE film by carrying the suspension on the substrate material, followed by drying, sintering and removing the substrate material. This method does not have too high requirements on the fluidity of the polymer melt, and PCTFE can be formed without additional high-pressure and high-shear effects, that is, the entire process is carried out without high temperature (the maximum forming temperature is not higher than 280°C). And high force field (including extrusion or shear force) environment, effectively avoiding the degradati...

Embodiment 1

[0080] The present embodiment provides a kind of preparation method of polychlorotrifluoroethylene film, specifically as follows:

[0081] First, weigh 2g of sodium dodecylbenzenesulfonate and dissolve it in 80g of deionized water, then add it together with 80g of PCTFE powder into the mixing tank, set the speed of the mixer to 400rpm, and the mixing time to 24h, then use ammonia water to adjust the pH of the system When the value reaches 10.0, a stable PCTFE suspension is obtained. Next, using high borosilicate glass as the substrate material, an automatic coating machine is used to coat a wet film of PCTFE suspension with a thickness of 40 μm on the high borosilicate glass. Then, set the temperature of the coater to 60°C, and dry the wet film thoroughly. Next, move the glass and the dry film it carries into the sintering furnace and place it horizontally, set the heating rate at 20°C / min, sinter at 210°C for 15 minutes, and then sinter at 260°C for 35 minutes. Finally, put...

Embodiment 2

[0083] Weigh 1.5g of sodium perfluorobutane sulfonate and 0.5g of sodium cetyl sulfate and dissolve them in 80g of deionized water. The rest of the operating steps and equipment are the same as in Example 1. Finally, a colorless and transparent PCTFE film is obtained with a thickness of about 10 μm.

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Abstract

The invention discloses a polytrifluorochloroethylene film as well as a preparation method and application thereof, and belongs to the technical field of preparation of polytrifluorochloroethylene films. The preparation method comprises the following steps of: dispersing PCTFE in a mixed dispersion medium to obtain a PCTFE suspension, loading the PCTFE suspension on the surface of a substrate material, drying, sintering, and then removing the substrate material. The method is different from a method for preparing a polymer film by using a forming machine, such as extrusion equipment or casting equipment. Compared with the prior art, the method does not have too high requirement on the fluidity of the polymer melt, forming can be achieved without additional high-pressure and high-shear effects, degradation of PCTFE in the hot working process can be effectively avoided, the advantageous performance of PCTFE can be better kept, and a novel PCTFE film processing and forming method is developed. The obtained PCTFE film has the advantages of higher transparency and water vapor barrier property, lower dielectric loss and favorable mechanical strength and toughness. The application prospect is wide.

Description

technical field [0001] The invention relates to the technical field of polychlorotrifluoroethylene film preparation, in particular to a polychlorotrifluoroethylene film and its preparation method and application. Background technique [0002] Polychlorotrifluoroethylene (PCTFE) is one of the earliest fluoroplastics developed and commercialized. The unique molecular structure of PCTFE endows it with many excellent properties, such as good chemical stability, weather resistance, transparency, non-combustibility, biocompatibility, low temperature toughness, barrier properties and dielectric properties, etc. Today, PCTFE has played an indispensable role in certain application links of high-end technology industries such as aerospace, national defense and military industry, electronics and electrical, pharmaceutical and chemical industries. For example, in aerospace, it is used as the packaging film of electronic instruments and the protective layer of light-emitting devices, we...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C08L27/12
CPCC08J5/18C08J2327/12
Inventor 沈佳斌何露郭少云
Owner SICHUAN UNIV
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