Lipoic acid-modified ethyl cellulose film and preparation method thereof

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...

Examples

Embodiment 1

[0014] The first step is to weigh ethyl cellulose and add it to the reaction vessel, add a certain amount of glacial acetic acid according to the mass ratio of ethyl cellulose / glacial acetic acid as 7:100, then raise the reaction temperature to 72°C and keep stirring for 2 Hour, until ethyl cellulose is completely dissolved in glacial acetic acid, cool to room temperature, can obtain the ethyl cellulose solution that mass fraction is 6.5%; The second step, the mass fraction is 6.5% ethyl cellulose solution Pour it into a mold, and then put it in an oven at 120°C for 2 hours to form a film to obtain a pure ethyl cellulose film.

Embodiment 2

[0016] The first step is to weigh ethyl cellulose and add it to the reaction vessel, add a certain amount of glacial acetic acid according to the mass ratio of ethyl cellulose / glacial acetic acid as 7:100, then raise the reaction temperature to 72°C and keep stirring for 2 Hour, until ethyl cellulose is completely dissolved in glacial acetic acid, is cooled to room temperature, can obtain the ethyl cellulose solution that mass fraction is 6.5%; The second step, takes by weighing quantitative lipoic acid and places reaction bottle, wherein , the mass ratio of lipoic acid and ethyl cellulose is 10 / 90, then add glacial acetic acid, raise the temperature to 80°C and stir for 0.5h until lipoic acid is completely dissolved in glacial acetic acid to obtain lipoic acid solution; the third step Add lipoic acid solution and 0.1% inhibitor of lipoic acid mass fraction to ethyl cellulose solution with a mass fraction of 6.5%, stir at 80°C for 0.5h, cool to room temperature, and pour into a...

Embodiment 3

[0018] The first step is to weigh ethyl cellulose and add it to the reaction vessel, add a certain amount of glacial acetic acid according to the mass ratio of ethyl cellulose / glacial acetic acid as 7:100, then raise the reaction temperature to 73°C and keep stirring for 2.5 Hour, until ethyl cellulose is completely dissolved in glacial acetic acid, is cooled to room temperature, can obtain the ethyl cellulose solution that mass fraction is 6.5%; The second step, takes by weighing quantitative lipoic acid and places reaction bottle, wherein , the mass ratio of lipoic acid and ethyl cellulose is 20 / 80, then add glacial acetic acid, raise the temperature to 83° C. and stir for 1 h until lipoic acid is completely dissolved in glacial acetic acid to obtain lipoic acid solution; the third step, The lipoic acid solution and the 0.2% polymerization inhibitor accounting for the lipoic acid mass fraction were added to the ethyl cellulose solution with a mass fraction of 6.5%, stirred at...

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...

Examples

Embodiment 1

[0014] The first step is to weigh ethyl cellulose and add it to the reaction vessel, add a certain amount of glacial acetic acid according to the mass ratio of ethyl cellulose / glacial acetic acid as 7:100, then raise the reaction temperature to 72°C and keep stirring for 2 Hour, until ethyl cellulose is completely dissolved in glacial acetic acid, cool to room temperature, can obtain the ethyl cellulose solution that mass fraction is 6.5%; The second step, the mass fraction is 6.5% ethyl cellulose solution Pour it into a mold, and then put it in an oven at 120°C for 2 hours to form a film to obtain a pure ethyl cellulose film.

Embodiment 2

[0016] The first step is to weigh ethyl cellulose and add it to the reaction vessel, add a certain amount of glacial acetic acid according to the mass ratio of ethyl cellulose / glacial acetic acid as 7:100, then raise the reaction temperature to 72°C and keep stirring for 2 Hour, until ethyl cellulose is completely dissolved in glacial acetic acid, is cooled to room temperature, can obtain the ethyl cellulose solution that mass fraction is 6.5%; The second step, takes by weighing quantitative lipoic acid and places reaction bottle, wherein , the mass ratio of lipoic acid and ethyl cellulose is 10 / 90, then add glacial acetic acid, raise the temperature to 80°C and stir for 0.5h until lipoic acid is completely dissolved in glacial acetic acid to obtain lipoic acid solution; the third step Add lipoic acid solution and 0.1% inhibitor of lipoic acid mass fraction to ethyl cellulose solution with a mass fraction of 6.5%, stir at 80°C for 0.5h, cool to room temperature, and pour into a...

Embodiment 3

[0018] The first step is to weigh ethyl cellulose and add it to the reaction vessel, add a certain amount of glacial acetic acid according to the mass ratio of ethyl cellulose / glacial acetic acid as 7:100, then raise the reaction temperature to 73°C and keep stirring for 2.5 Hour, until ethyl cellulose is completely dissolved in glacial acetic acid, is cooled to room temperature, can obtain the ethyl cellulose solution that mass fraction is 6.5%; The second step, takes by weighing quantitative lipoic acid and places reaction bottle, wherein , the mass ratio of lipoic acid and ethyl cellulose is 20 / 80, then add glacial acetic acid, raise the temperature to 83° C. and stir for 1 h until lipoic acid is completely dissolved in glacial acetic acid to obtain lipoic acid solution; the third step, The lipoic acid solution and the 0.2% polymerization inhibitor accounting for the lipoic acid mass fraction were added to the ethyl cellulose solution with a mass fraction of 6.5%, stirred at...

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