A kind of 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, and achieve the effects of high cost, good flexibility, and high mechanical strength

Active Publication Date: 2022-01-04
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current research reports mainly focus on the preparation of batteries through DES extraction and distillation, dissolving cellulose, and deposition. There are no reports on the application of DES to promote the dissolution of polysaccharides or enhance the mechanical properties of membrane materials.

Method used

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  • A kind of degradable film and preparation method thereof
  • A kind of degradable film and preparation method thereof
  • A kind of degradable film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

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 membrane materials, and provides a degradable membrane, comprising the following raw materials in parts by weight: 0.5-2 parts of Gracilaria brittle polysaccharide, 0.2-1 part of chitosan, and 0.05-0.1 part of sodium carboxymethyl cellulose , 0.5-3 parts of low-temperature eutectic solvent and 94-99 parts of distilled water. The present invention uses Gracilaria brittle polysaccharide, chitosan and sodium carboxymethyl cellulose as raw materials, low-temperature eutectic solvent as solubilizer and plasticizer, distilled water as solvent, heating and stirring until colorless and transparent liquid is poured into Put it in the container, dry it, and peel off the film to get the degradable film. The degradable film prepared by the present invention has a wide range of raw materials, low cost, simple operation and degradability, so that the degradable polysaccharide film has a broader application prospect, and also broadens the application field of Gracilaria brittle polysaccharides and low-temperature eutectic solvents. research direction.

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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Patent Type & Authority Patents(China)
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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