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A kind of lipoic acid modified ethyl cellulose film and preparation method thereof

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

Active Publication Date: 2022-03-04
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 sulfur in the lipoic acid structure Atoms and carboxyl groups can form hydrogen bonds with the hydroxyl groups of ethyl cellulose, a lipoic acid modified ethyl cellulose film and its preparation method are designed, which can improve the flexibility of ethyl cellulose film

Method used

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  • A kind of lipoic acid modified ethyl cellulose film and preparation method thereof
  • A kind of lipoic acid modified ethyl cellulose film and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0014] The first step, weighed ethyl cellulose was added to the reaction vessel, the mass ratio of ethyl cellulose / glacial acetic acid 7: amount of glacial acetic acid was added to 100, and then the reaction temperature was raised to 72 deg.] C, stirring was continued for 2 hours, until the ethyl cellulose was completely dissolved in glacial acetic acid, cooled to room temperature, to obtain a mass fraction of 6.5% ethyl cellulose solution; the second step, the mass fraction of 6.5% ethyl cellulose solution poured into a mold, and then placed in an oven at 120 deg.] C so that the deposition 2h, to give pure ethyl cellulose film.

Embodiment 2

[0016] The first step, weighed ethyl cellulose was added to the reaction vessel, the mass ratio of ethyl cellulose / glacial acetic acid 7: amount of glacial acetic acid was added to 100, and then the reaction temperature was raised to 72 deg.] C, stirring was continued for 2 hours, until the ethyl cellulose was completely dissolved in glacial acetic acid, cooled to room temperature, to obtain a mass fraction of 6.5% ethyl cellulose solution; the second step, weighed and placed in a reaction flask amount of lipoic acid, wherein , lipoic acid and ethylcellulose mass ratio of 10 / 90, followed by addition of glacial acetic acid, the temperature was raised to 80 deg.] C was stirred for 0.5h, until completely dissolved in glacial acetic acid lipoic acid, lipoic acid solution can be obtained; step , accounting for the lipoic acid and lipoic acid content was 0.1% by mass of a polymerization inhibitor fraction were added to 6.5% ethyl cellulose solution was stirred at 80 ℃ 0.5h, cooled to ...

Embodiment 3

[0018] The first step, weighed ethyl cellulose was added to the reaction vessel, the mass ratio of ethyl cellulose / glacial acetic acid 7: amount of glacial acetic acid was added to 100, and then the reaction temperature was raised to 73 ℃, stirring was continued for 2.5 hours, until the ethyl cellulose was completely dissolved in glacial acetic acid, cooled to room temperature, to obtain a mass fraction of 6.5% ethyl cellulose solution; the second step, weighed and placed in a reaction flask amount of lipoic acid, wherein , lipoic acid and ethylcellulose mass ratio of 20 / 80, followed by addition of glacial acetic acid, the temperature was raised to 83 deg.] C IH stirring, until completely dissolved in glacial acetic acid lipoic acid, lipoic acid solution can be obtained; the third step, solution of lipoic acid and lipoic acid accounted for 0.2% of the mass fraction of the polymerization inhibitor were added to the mass fraction of 6.5% ethyl cellulose solution was stirred at 83 ...

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Abstract

A lipoic acid modified ethyl cellulose film and a preparation method thereof, the first step is to weigh ethyl cellulose in a reaction vessel, add an organic solvent, heat up and continue stirring until the ethyl cellulose is completely dissolved and then cooled to room temperature , can obtain ethyl cellulose solution; second step, weigh solid lipoic acid and join in reaction container, add organic solvent to dissolve, can obtain lipoic acid solution; The cellulose-based solution and the polymerization inhibitor are blended, stirred until the mixed solution is clear, poured into a mold, and put into an oven to form a film. Compared with the pure ethyl cellulose film, the membrane material of the invention has greatly improved mechanical properties and can broaden the application range of the ethyl cellulose film. In addition, the present invention uses the widely sourced and renewable ethyl cellulose as the raw material and the non-toxic and environment-friendly lipoic acid as the modifier, and the prepared film has excellent performance and has the advantages of water resistance and degradability.

Description

Technical field [0001] The present invention belongs to the field of materials, particularly relates to a lipoic acid modified ethyl cellulose film and its preparation method. Background technique [0002] Cellulose is the oldest on Earth, the most abundant natural polymer, which is the main component of plant cell walls, more than 50% of the carbon content of the vegetable kingdom. As of the most precious natural renewable resources, cellulose and its derivatives Application began more than 160 years. Since the water sensitivity of cellulose, insoluble and infusible, limiting its development in various fields; simultaneously with the rise of petrochemical products and synthetic materials, cellulose been studied heat gradually decreases. However, the oil crisis increasingly significant problem of environmental pollution and its products, so that people have to find a suitable substitute for oil, so once again it sights on biodegradable, renewable fiber and good biocompatibility a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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