Method for improving plasticity and flexibility of bacterial cellulose membrane

Abstract

The invention relates to a method for improving the plasticity and flexibility of a bacterial cellulose membrane. Microbial Gluconacetobacter xylinum is cultured by static culture so as to obtain an initial bacterial cellulose wet membrane sample, and after the sample is soaked in alkaline liquor and then soaked and purified in deionized water, the purified bacterial cellulose membrane is soaked into polyether amine salt solutions with different concentrations (1-5.2wt%) firstly, the obtained object is put into an oscillator to oscillate and compound for 24h at room temperature, and then the compounded bacterial cellulose membrane / polyether amide membrane, after being washed by using deionized water, is dried at certain temperature, the plasticity of the obtained final bacterial cellulose / polyether amine compounded membrane is 45.8%, compared with the plasticity 4% of a bacterial cellulose membrane before compounding, the plasticity of the compounded cellulose membrane is increased by 11.45 times, so that the bacterial cellulose is applied more widely to the fields of chemical engineering, paper making and biomedicine; and in addition, the method is low in production and operation costs, less in equipment investment, and high in feasibility.

Description

technical field [0001] The invention belongs to the field of polymer chemistry and polymer technology, and mainly relates to a method for directly compounding bacterial cellulose wet film with polyether amine salt to improve the plasticity and flexibility of bacterial cellulose. technical background [0002] Bacterial Cellulose is a type of pure cellulose produced by microorganisms. From the molecular composition of cellulose, both are directly composed of β-D-glucose through β-1,4-glucosidic bonds. The straight chains are parallel to each other, not in a helical conformation, and without branched structure, also known as β-1,4-glucan. Bacterial cellulose is chemically identical to cellulose produced by plants or algae. However, as a new type of biological material, bacterial cellulose has many unique properties. 1) High crystallinity and high chemical purity. It does not contain hemicellulose, lignin and other cell wall components, and the purification process is simple;...

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Problems solved by technology

[0005] The problem to be solved by the present invention is the lack of flexibility and plasticity of bacterial cellulose membrane in application, so a simple and economical composite method is proposed to improve the flexibility of bacterial cellulose and expand the application of bacterial cellulose range; Secondly, for the toughening agent polyetheramine, the cost of polyetheramine is low, the toxicity is small, and the pollution to the environment is small, so it is a better toughening agent in the modification of bacterial cellulose

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