Lipoic acid-modified ethyl cellulose film and preparation method thereof

A technology of ethyl cellulose and lipoic acid, which is applied in the field of materials, can solve the problems of pure ethyl cellulose film such as brittleness and poor flexibility, and achieve the effect of improving performance and value, improving flexibility and broadening the application field

Active Publication Date: 2020-05-22
INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Technical problem solved: In order to solve the problem of pure ethyl cellulose film flexibility, brittleness and poor flexibility, the present invention selects lipoic acid widely present in food and animal mitochondrial cells as a modifier, and utilizes the sul

Method used

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  • Lipoic acid-modified ethyl cellulose film and preparation method thereof
  • Lipoic acid-modified ethyl cellulose film and preparation method thereof

Examples

Experimental program
Comparison scheme
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Example Embodiment

[0013] Example 1

[0014] In the first step, the ethyl cellulose is weighed and added to the reaction vessel, and a quantitative amount of glacial acetic acid is added according to the mass ratio of ethyl cellulose / glacial acetic acid of 7:100, and then the reaction temperature is increased to 72°C, and stirring is continued for 2 Hours, until the ethyl cellulose is completely dissolved in glacial acetic acid, cool to room temperature to obtain an ethyl cellulose solution with a mass fraction of 6.5%; in the second step, the ethyl cellulose solution with a mass fraction of 6.5% Pour it into the mold, and put it in an oven at 120°C for 2h to form a film to obtain a pure ethylcellulose film.

Example Embodiment

[0015] Example 2

[0016] In the first step, the ethyl cellulose is weighed and added to the reaction vessel, and a quantitative amount of glacial acetic acid is added according to the mass ratio of ethyl cellulose / glacial acetic acid of 7:100, and then the reaction temperature is increased to 72°C, and stirring is continued for 2 Hours, until the ethyl cellulose is completely dissolved in glacial acetic acid, cool to room temperature, you can get an ethyl cellulose solution with a mass fraction of 6.5%; in the second step, weigh a quantitative amount of lipoic acid and place it in the reaction flask, where , The mass ratio of lipoic acid and ethyl cellulose is 10 / 90, then add glacial acetic acid, raise the temperature to 80℃ and stir for 0.5h, until the lipoic acid is completely dissolved in the glacial acetic acid, then the lipoic acid solution can be obtained; , The lipoic acid solution and the polymerization inhibitor with a mass fraction of lipoic acid of 0.1% were added to ...

Example Embodiment

[0017] Example 3

[0018] In the first step, the ethyl cellulose is weighed and added to the reaction vessel, and a quantitative amount of glacial acetic acid is added according to the mass ratio of ethyl cellulose / glacial acetic acid of 7:100, and then the reaction temperature is raised to 73°C, and stirring is continued for 2.5 Hours, until the ethyl cellulose is completely dissolved in glacial acetic acid, cool to room temperature, you can get an ethyl cellulose solution with a mass fraction of 6.5%; in the second step, weigh a quantitative amount of lipoic acid and place it in the reaction flask, where , The mass ratio of lipoic acid and ethyl cellulose is 20 / 80, then add glacial acetic acid, raise the temperature to 83 ℃ and stir for 1 hour, until the lipoic acid is completely dissolved in the glacial acetic acid, then the lipoic acid solution can be obtained; the third step, The lipoic acid solution and the polymerization inhibitor with a mass fraction of lipoic acid of 0.2...

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Abstract

The invention discloses ipoic a lacid-modified ethyl cellulose film and a preparation method thereof. The preparation method comprises the following steps: step 1, weighing ethyl cellulose, adding theweighed ethyl cellulose into a reaction container, adding an organic solvent, carrying out heating and continuous stirring until the ethyl cellulose is completely dissolved, and performing cooling toroom temperature so as to obtain an ethyl cellulose solution; 2, weighing solid lipoic acid, adding the solid lipoic acid into another reaction container, and adding an organic solvent for dissolvingof the solid lipoic acid to obtain a lipoic acid solution; and 3, weighing a proper amount of the lipoic acid solution, the ethyl cellulose solution and a polymerization inhibitor, carrying out blending and stirring until the formed mixed solution is clear, pouring the mixed solution into a mold, and putting the mold into an oven to form a film. Compared with a pure ethyecellulose film, the filmprovided by the invention has the advantages that the mechanical properties of the film are greatly improved, and the application range of the ethyecellulose film can be widened. Besides, the film prepared by taking ethyl cellulose which is wide in source and renewable as a raw material and taking non-toxic and environment-friendly lipoic acid as a modifier has the advantages of excellent performance, water resistance, degradability and the like.

Description

technical field [0001] The invention belongs to the field of materials, and in particular relates to a lipoic acid modified ethyl cellulose film and a preparation method thereof. Background technique [0002] Cellulose is the oldest and most abundant natural polymer on earth. It is the main component of plant cell walls and accounts for more than 50% of the carbon content in the plant kingdom. As the most precious natural renewable resource for human beings, the applied research on cellulose and its derivatives began more than 160 years ago. Due to the water sensitivity, insoluble and infusible properties of cellulose, its development in various fields is limited; at the same time, with the rise of petrochemical synthetic products and materials, people's research on cellulose has gradually decreased. However, the increasingly obvious oil crisis and the pollution of its products to the environment make people have to look for suitable oil substitutes, so people once again tu...

Claims

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Application Information

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IPC IPC(8): C08J5/18C08L1/28C08K5/45
CPCC08J5/18C08J2301/28C08K5/45
Inventor 周永红林雅玫丁海阳夏建陵李守海李梅杨小华许利娜张燕
Owner INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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