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Preparation method of enhanced cellulose acetate transparent composite film

A technology of cellulose acetate and composite film, which is applied in the field of preparation of transparent composite film, can solve problems such as shortage and pollution, and achieve the effects of low cost, improved strength and increased flexibility

Active Publication Date: 2021-05-14
HUNAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the defects of the prior art and better solve a series of problems such as energy shortage and environmental pollution, the present invention provides a method for preparing an enhanced cellulose acetate transparent composite film with simple process, environmental friendliness and excellent performance

Method used

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  • Preparation method of enhanced cellulose acetate transparent composite film
  • Preparation method of enhanced cellulose acetate transparent composite film
  • Preparation method of enhanced cellulose acetate transparent composite film

Examples

Experimental program
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Effect test

Embodiment 1

[0029] 10 parts by weight of cellulose acetate powder and 50 parts by weight of tetrahydrofuran solvent were placed in a sealed reactor, and after stirring for 3 hours at normal temperature and pressure, the cellulose acetate powder was completely dissolved in tetrahydrofuran; then 1 part by weight of glycerin and 4 Stirring parts by weight of ethanol to obtain a transparent solution; slowly adding 0.5 parts by weight of nano-alumina to the transparent solution while stirring, mixing evenly, and standing for 2 hours to defoam. The obtained mixed solution is coated on the template by the continuous flow method, and the film is formed by dry phase inversion in the air atmosphere under the environment of normal temperature and pressure, and the relative humidity is less than 60%; the film is peeled off from the template, and the coating is adjusted The thickness of the cellulose acetate solution on the mold is used to control the total thickness of the film to 0.06mm; and then the...

Embodiment 2

[0031] Place 20 parts by weight of cellulose acetate powder and 120 parts by weight of tetrahydrofuran solvent in a sealed reactor, stir for 3 hours at normal temperature and pressure, and completely dissolve the cellulose acetate powder in tetrahydrofuran; then add 2 parts by weight of ethylene glycol Stir with 6 parts by weight of propanol to obtain a transparent solution; slowly add 2.0 parts by weight of nano-alumina into the stirred transparent solution, mix evenly, and let stand for 2 hours to defoam. The obtained mixed solution is coated on the template by the continuous flow method, and the film is formed by dry phase inversion in the air atmosphere under the environment of normal temperature and pressure, and the relative humidity is less than 60%; the film is peeled off from the template, and the coating is adjusted The thickness of the cellulose acetate solution on the mold is used to control the total thickness of the film to 0.06mm; and then the film product is cut...

Embodiment 3

[0033] 10 parts by weight of cellulose acetate powder and 50 parts by weight of acetone solvent are placed in a sealed reactor, and after stirring for 3 hours at normal temperature and pressure, the cellulose acetate powder is completely dissolved in acetone; then add 1 part by weight of glycerin and 4 Stir the butanol in parts by weight to obtain a transparent solution; slowly add 1.5 parts by weight of nanometer aluminum hydroxide into the transparent solution while stirring, mix evenly, and let stand for 2 hours to defoam. The obtained mixed solution is coated on the template by the continuous flow method, and the film is formed by dry phase inversion in the air atmosphere under the environment of normal temperature and pressure, and the relative humidity is less than 60%; the film is peeled off from the template, and the coating is adjusted The thickness of the cellulose acetate solution on the mold is used to control the total thickness of the film to 0.04mm; then the film...

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Abstract

The invention discloses a preparation method of an enhanced cellulose acetate transparent composite film. The preparation method comprises the following steps: stirring cellulose acetate powder, a plasticizer, an anti-reflection agent and a solvent in a reactor, and then performing standing for defoaming, so that the cellulose acetate powder is completely dissolved in the solvent and a transparent cellulose acetate solution is obtained; adding nano metal oxide or hydroxide into the cellulose acetate solution, performing uniform mixing and stirring, coating the obtained mixed solution on a template, and forming a film at normal temperature and normal pressure through a dry phase inversion technology; and stripping the film from the template to obtain the enhanced cellulose acetate transparent composite film product. The enhanced biomass-based transparent composite film prepared by the invention not only promotes the research process of high-value utilization of biomass resources, but also opens up a new way for solving a series of environmental problems such as white pollution caused by traditional petroleum-based plastics.

Description

technical field [0001] The invention relates to the preparation of a transparent composite film, in particular to a preparation method of a biodegradable enhanced cellulose acetate transparent composite film. Background technique [0002] Fossil-based plastics are light, convenient and durable, and have become an indispensable part of human social life. With the rapid development of human society, the amount of fossil-based plastics is also increasing rapidly. However, only a small part of plastics can be recycled and reused. Great danger has come. In order to better solve a series of problems such as resource shortage and environmental pollution caused by fossil-based plastics, people began to seek alternatives to fossil resources. Biomass is considered as a potential fossil replacement resource due to its rich resources, wide range of sources, renewable and biodegradable characteristics. Cellulosic biomass is the most widely distributed and most abundant polysaccharide ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C08L1/12C08K3/22C08K3/36C08K5/053
CPCC08J5/18C08K2201/011C08K2201/003C08K2003/2227C08J2301/12C08K3/36C08K5/053
Inventor 袁正求伍萍陈雪梅金灿韩荣陈柳石顺存周虎
Owner HUNAN UNIV OF SCI & TECH