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Non-transparent film with controllable and reversible transparency and preparation method thereof

A transparent film and transparency technology, applied in the field of material engineering, can solve the problems of unchangeable transparency and poor toughness of PMMA, and achieve the effect of avoiding high cost and pollution and simple process

Active Publication Date: 2021-08-24
NANTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But PMMA has poor toughness and unchangeable transparency

Method used

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  • Non-transparent film with controllable and reversible transparency and preparation method thereof
  • Non-transparent film with controllable and reversible transparency and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Take PMMA and PMAA by mass ratio 1:1, dissolve with 10mL acetone, its configuration concentration is 0.2g / mL, stir for 24 hours, inject the solution in the 2mL mold, treat that acetone volatilizes completely, prepare into PMMA / PMAA film (the The physical picture of the membrane is figure 1 In the picture corresponding to 1-0min, the transmittance is 86%, corresponding to figure 2 point in 1).

Embodiment 2

[0024] The PMMA / PMAA film that embodiment 1 obtains is immersed in water, and 50 ℃ of water-baths, heat 10min, obtain the opaque film (the physical figure of this film is that light transmittance is about 51%) figure 1 The picture corresponding to 2-10min in the middle, corresponding to figure 2 point 2).

Embodiment 3

[0026] The PMMA / PMAA film that embodiment 1 obtains is immersed in water, 50 ℃ of water-baths, heat 20min, obtain the opaque film (the physical figure of this film is that light transmittance is about 13%) figure 1 3-20min in the middle, corresponding to figure 2 in point 3).

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Abstract

The invention belongs to the technical field of material engineering, and relates to a non-transparent film with controllable and reversible transparency and a preparation method thereof. The preparation method comprises the steps: S1, dissolving polymethyl methacrylate (PMMA) and polymethylacrylic acid (PMAA) in an acetone solution to obtain a mixed solution; S2, stirring the mixed solution for 24-48 hours, injecting the mixed solution into a mold, and standing until the acetone is completely volatilized to obtain a PMMA / PMAA film; and S3, carrying out water bath soaking and heating treatment on the PMMA / PMAA film, to obtain the non-transparent film with controllable and reversible transparency. The transparency of the non-transparent film is controllable, and the transparency of the non-transparent film can be regulated and controlled by soaking the non-transparent film in ethanol for heating. The prepared non-transparent film can be widely applied to plastic products, the process is simple, high cost and pollution caused by secondary processing of plastic products are avoided, the defects of transparent plastic products in the market are overcome, and the non-transparent film is suitable for large-scale production.

Description

technical field [0001] The invention belongs to the technical field of material engineering, and relates to a controllable and reversible opaque film and a preparation method thereof. Background technique [0002] Polymethyl methacrylate (PMMA), PMMA has a high transmittance of 92-94% in visible light, small birefringence and Abel number, high surface gloss, excellent weather resistance and impact resistance, low price, The preparation process is simple and the excellent properties such as easy molding and processing have wide applications in the fields of vehicles, building materials, optical instruments, household appliances and the like. However, PMMA has poor toughness and unchangeable transparency. Contents of the invention [0003] In view of this, the object of the present invention is to provide a kind of transparency controllable and reversible opaque film and its preparation method, the preparation method process is simple, the required time is short, and the pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C08L33/12C08L33/02C08J7/00C08J7/02
CPCC08J5/18C08J7/08C08J7/02C08J2333/12C08J2333/02
Inventor 袁卉华黄泽鹏宣红云李碧云薛也
Owner NANTONG UNIVERSITY
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