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Method for preparing cellulose membrane by utilizing rice straw

A technology of rice straw and cellulose film, which is applied in fiber raw material processing, textile and papermaking, etc., can solve the problem of high utilization rate of cellulose, and achieve the effects of easy industrial production, reducing pollution and improving dissolution rate.

Inactive Publication Date: 2018-04-06
柳州市柳科科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is no pollutant discharge in the whole process, it will not cause environmental pollution, and the utilization rate of cellulose is relatively high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A method for preparing cellulose film from rice straw, comprising the following steps:

[0033] S1. Straw pretreatment:

[0034] Clean and chop the rice stalks into short stems with a length of 2 to 5 cm, and then add them into an aqueous ethanol solution for pretreatment for 0.5 h at a treatment temperature of 180° C., and then dry them.

[0035] The bath ratio of the pretreatment process is 1:8. The ethanol concentration in the ethanol aqueous solution is 60%.

[0036] S2. Cellulose dissolution:

[0037] Melt the 1-allyl-3-methylimidazolium chloride salt ionic liquid completely at 90°C, then add the pretreated rice straw, the bath ratio is 1:8, continue to heat and keep warm to dissolve, the time for keep warm to dissolve For 6h, the temperature is 95°C. Finally, the undissolved rice straw was removed by centrifugation to obtain a cellulose ionic liquid solution.

[0038] S3. Mold making:

[0039] The cellulose ionic liquid solution was placed on a clean glass p...

Embodiment 2

[0041] A method for preparing cellulose film by using rice straw, the straw pretreatment time is 1 hour. Other steps are with embodiment 1.

Embodiment 3

[0043] A method for preparing cellulose film by using rice straw, the straw pretreatment time is 2 hours. Other steps are with embodiment 1.

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Abstract

The invention provides a method for preparing a cellulose membrane by utilizing rice straw, which relates to the field of the utilization of crop straw. The method comprises the following steps: pre-treating straw, dissolving cellulose, and molding. The method specifically comprises the following steps: firstly pre-treating the straw in an ethanol aqueous solution and drying; then melting 1-allyl-3-methylimidazolium chloride ion liquid, adding the pre-treated rice straw, continuously heating, preserving the heat, dissolving, and obtaining a cellulose ion liquid solution; and then smearing thesolution by using a smearing machine to form a membrane, and drying to obtain the cellulose membrane. According to the method for preparing the cellulose membrane by utilizing rice straw provided bythe invention, the ethanol aqueous solution is firstly used for pre-treating the rice straw so as to remove lignin and hemicellulose, then the ion liquid is used for dissolving the cellulose to obtainthe cellulose ion liquid solution, and finally the solution is molded to obtain the cellulose membrane. The entire process is free from emission of pollutants, the environmental pollution can be avoided, and the utilization rate of the cellulose is relatively high.

Description

technical field [0001] The invention relates to the field of crop straw utilization, in particular to a method for preparing a cellulose film by utilizing rice straw. Background technique [0002] my country is a major rice producing country, and a large amount of rice straw is produced every year. Most of the rice straw is discarded and burned at will, causing great environmental pollution, affecting the quality of life of farmers, and causing a great waste of resources. How to solve the environmental problems caused by random discarding and burning of rice stalks in rural areas and improve the quality of life of farmers has become an important issue in the construction of new countryside. [0003] The cellulose content in rice straw accounts for about 30-50% of the dry weight of rice straw. Straw cellulose extracted from rice straw is a natural raw material for the production of clean energy and fine chemicals. To develop a method of using rice straw as a raw material to p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C08J3/09C08L1/02D21C5/00
CPCC08J3/096C08J5/18C08J2301/02D21C5/00
Inventor 李文
Owner 柳州市柳科科技有限公司
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