Degradable film and preparation method thereof

A technology for degrading membranes and solvents, applied in the field of membrane materials, can solve problems such as mechanical properties that have not been reported yet

Active Publication Date: 2021-05-18
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the current research reports mainly focus on the preparation of batteries through DES extraction and distillation, dissolving cellulose, and depo...

Method used

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  • Degradable film and preparation method thereof
  • Degradable film and preparation method thereof
  • Degradable film and preparation method thereof

Examples

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Embodiment 1

[0042] Choline chloride, glycerin, and lactic acid are heated and stirred at 60° C. in a mass ratio of 3:2:2 to a colorless and transparent solution, which is the DES solution required by the present invention. Weigh 1 part of Gracilaria brittle polysaccharide (molecular weight is 298.8kDa), dissolve it in 50 parts of water after adding 0.5 part of DES; add 1 part of DES solvent to chitosan (0.5 part) and sodium carboxymethyl cellulose (0.1 part) After dissolving in 50 parts of water, slowly pour the blend of chitosan and sodium carboxymethylcellulose into the Gracilaria brittle solution at 50° C., and stir the mixed solution to a uniform state. Pour the uniformly mixed solution into a petri dish with a diameter of 6 cm and a thickness of 8-10 mm, dry at 60°C, peel off the film and record it as F3.

Embodiment 2

[0044] Choline chloride, glycerin, and lactic acid are heated and stirred at 60°C until a colorless and transparent solution is obtained, which is the DES solution required by the present invention. Weigh 1 part of Gracilaria brittle polysaccharide (molecular weight is 501.4kDa), dissolve it in 50 parts of water after adding 0.5 part of DES; add 1 part of DES solvent to chitosan (0.5 part) and sodium carboxymethyl cellulose (0.1 part) After dissolving in 50 parts of water, slowly pour the blend of chitosan and sodium carboxymethyl cellulose into the Gracilaria brittle solution at 50° C., and stir until it is uniform. Pour the uniformly mixed solution into a petri dish with a diameter of 6 cm and a thickness of 8-10 mm, dry at 60°C, peel off the film and record it as F4.

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Abstract

The invention relates to the technical field of film materials, and provides a degradable film, which is prepared from the following raw materials in parts by weight: 0.5 to 2 parts of Gracilaria chouae polysaccharide, 0.2 to 1 part of chitosan, 0.05 to 0.1 part of sodium carboxymethyl cellulose, 0.5 to 3 parts of a low-temperature co-melting solvent and 94 to 99 parts of distilled water. The preparation method comprises the following steps: by taking the Gracilaria chouae polysaccharide, chitosan and sodium carboxymethyl cellulose as raw materials, the low-temperature co-melting solvent as a dissolution promoter and a plasticizer and the distilled water as a solvent, heating and stirring until a colorless transparent liquid is formed, pouring the colorless transparent liquid into a container, drying, and uncovering the film, so as to obtain the degradable film. The degradable film prepared by the method is wide in raw material source, low in cost, simple to operate and degradable, so that the degradable polysaccharide film has a wider application prospect, and the application field and research direction of the gracilaria brittleness polysaccharide and the low-temperature eutectic solvent are widened.

Description

technical field [0001] The invention relates to the technical field of membrane materials, and more specifically relates to a degradable membrane based on Gracilaria brittle polysaccharide and a low-temperature eutectic solvent and a preparation method thereof. Background technique [0002] Synthetic plastics have developed rapidly in the past few decades with excellent performance and low cost and have spread throughout people's lives. However, since synthetic plastics are not degradable, they have caused serious pollution to the environment. Many domestic companies have strengthened their efforts to degradable plastics. research and development. Degradable film materials are mainly divided into the following three types: the first film is made of photodegradable materials such as polylactic acid (PLA) and cellulose acetate (CA), and its performance is already comparable to that of traditional PVDF and PES films. The degradation of the material requires a certain amount of...

Claims

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Application Information

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IPC IPC(8): C08L5/00C08L5/08C08L1/28C08J5/18
CPCC08J5/18C08J2305/00C08J2405/08C08J2401/28
Inventor 游丽君常史媛李雄朱必洋赵振刚
Owner SOUTH CHINA UNIV OF TECH
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