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Method for preparing cellulose nano-grade filament film by using recovered waste paper

A technology of nanofibrils and cellulose fibers, which is applied in secondary cellulose fibers, paper recycling, waste paper processing, etc. It can solve the problem of low hydrolysis yield and achieve the effect of simple and easy grinding treatment

Inactive Publication Date: 2012-12-12
襄垣县鑫瑞达连氏塑木制造有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

From the perspective of cost and equipment, biological pretreatment shows unique advantages. Specific lignin enzymes can be used to treat raw materials to decompose lignin and improve lignin digestibility, but the hydrolysis rate after biological pretreatment is very low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0009] 1. Chemical pretreatment,

[0010] 1) Accurately weigh 4g of recycled waste paper, dissolve it in 150ml of distilled water, and use a shredder to crush the wet recycled waste paper into pulp;

[0011] 2) Add 0.5ml glacial acetic acid and 0.6g sodium chlorite to the pulp, stir evenly with a glass rod, seal the mouth of the cup with plastic wrap, heat it in a constant temperature water bath at 75°C for 1 hour, put a magnet in the cup for continuous Stir to make the reaction more complete. After stirring for 1 hour, continue to add 0.5ml of glacial acetic acid and 0.6g of sodium chlorite to the beaker, continue heating in a water bath at 75°C for 1h, repeat this twice until the sample turns white, and then Filtrate with a vacuum filter pump and a Buchner funnel, and wash the sample continuously with distilled water until the filtrate becomes neutral, so as to remove the residual lignin in the waste paper and obtain cellulose fibers;

[0012] 3) Put the brown cellulose fib...

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Abstract

The invention relates to a method for preparing a cellulose nano-grade filament film by using recovered waste paper. The method comprises the steps of chemical pretreatment, mechanical separation, and film preparation. The method has the advantages that: the film is prepared through a combination of acid-alkali pretreatment and wood powder grinding; lignin in the wood powder is removed mainly by using sodium chlorite in an acidic condition; hemicellulose in the wood powder is removed by using dilute potassium hydroxide, and the rest is substantially cellulose; and the cellulose is subjected to a fiber-opening process by using dilute hydrochloric acid. With the fiber-opening process, hydrogen bonding interactions in the filaments are reduced, such that biomass cellulose nano-grade filaments with high length-diameter ratios are obtained. Minerals in the fibers are removed through hydrochloric acid treatment, and alkali-insoluble hemicellulose in purified cellulose is affected, such that an effect of cellulose fiber purification is achieved. The chemical components are detected through Fourier transform infrared. The grinding treatment is simple and easy to operate, such that large-scale production can be carried out. An elastic modulus is 2901.14MPa, and a tensile strength is 63.26MPa.

Description

technical field [0001] The invention relates to a method for preparing a cellulose nanofibril film by using recycled waste paper. The invention belongs to the technical field of biomass nanofibers. Background technique [0002] The separation process of biomass cellulose nanofibrils mainly includes pretreatment and mechanical separation. Two main treatment methods are used throughout the separation process: mechanical treatment and chemical treatment. Although the mechanical treatment consumes a certain amount of energy, the raw materials can be fully utilized; in the chemical treatment, only about half of the raw materials are used, and the other half of the raw materials are removed, but the stirring in the experiment will promote the generation of chemical heat and effectively remove impurities. The heat of combustion is the energy consumed in the entire chemical reaction process. [0003] At present, there is a method of oxidation pretreatment, that is, cellulose nan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H11/14D21C5/02D21F13/00D06M13/188D06M11/30D06M11/38
CPCY02W30/64
Inventor 李爱军李大纲顾文彪薛莹莹胡月潘佳陈振东李明珠李雪婷
Owner 襄垣县鑫瑞达连氏塑木制造有限公司
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