Preparation method of cellulose polyvinyl alcohol composite film and supercapacitor based on phase inversion

A technology of polyvinyl alcohol and polyvinyl alcohol solution, which is applied in the field of electrochemical materials, can solve the problems of low liquid absorption rate and liquid retention rate, low surface energy, lyophilicity, and poor wettability, and achieve high liquid absorption rate , Good lyophilicity, high liquid retention effect
CN111499998BActive Publication Date: 2022-06-03GUANGXI UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
GUANGXI UNIV
Publication Date
2022-06-03

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Abstract

The invention discloses a preparation method of a cellulose polyvinyl alcohol composite film based on phase inversion and a preparation method of a supercapacitor, comprising: using sodium hydroxide, urea, and cellulose raw materials to prepare a cellulose solution; combining the cellulose solution and The polyvinyl alcohol solution is mixed in proportion to form a film to obtain a film. The cellulose in the film accounts for 10-25% of the solid content of the film; the film is soaked and regenerated in a mixed solution of calcium chloride and hydrochloric acid, and then soaked in glycerin for plasticization treatment. Dry to obtain a cellulose polyvinyl alcohol composite film. The present invention takes cellulose as raw material, sodium hydroxide, urea and water as solvent, adopts dissolution-regeneration, the method for phase inversion to prepare cellulose polyvinyl alcohol composite film, this composite film has good performance compared with traditional polyolefin materials Tensile strength, elongation at break and lyophilicity, high porosity, liquid absorption and liquid retention. Supercapacitors assembled from this composite film can exhibit good electrochemical performance.
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Description

technical field

[0001] The present invention relates to the technical field of electrochemical materials, and more particularly, the present invention relates to a method for preparing a cellulose-polyvinyl alcohol composite film based on phase inversion and a method for preparing a super capacitor. Background technique

[0002] With the increase in the amount of petrochemical resources and the decrease in reserves, the development of green and renewable energy has gradually become a global consensus, and the development and utilization of biomass resources has received extensive attention. Cellulose is a large-scale, renewable, and environmentally friendly biomass resource. Its membrane has good wettability, low cost, light weight, low heat shrinkage, and strong mechanical properties. It is expected to be used in the field of supercapacitor separators. At present, most of the diaphragms used in domestic supercapacitors are imported from Europe, the United States (Celgard Co...

Claims

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