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Method for preparing cotton cellulose nano fibril film

A technology of nanofibrils and cellulose fibers, which can be used in fiber treatment, fiber raw material treatment, textiles and papermaking, etc. It can solve the problem of low hydrolysis yield and achieve the effect of simple and easy grinding treatment

Active Publication Date: 2012-11-21
SHANDONG LVSEN WOOD PLASTIC COMPOSITE
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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

[0008] Extraction of cotton cellulose nanofibrils:

[0009] 1. Chemical pretreatment,

[0010] 1) Accurately weigh 4g of cotton;

[0011] 2) Transfer the weighed cotton into a 250ml beaker, add 100ml of distilled water, 0.5ml of glacial acetic acid and 0.6g of sodium chlorite, stir well with a glass rod, seal the mouth of the cup with plastic wrap, and put it in a constant temperature water bath at 75°C Heat in the pot for 1 hour, put a magnet in the cup for constant stirring, to make the reaction more fully, filter with a vacuum filter pump and a Buchner funnel after 1 hour, and wash the sample continuously with distilled water until the filtrate becomes neutral, that is, cellulose fiber;

[0012] 3) Put the brown cellulose fiber into a 250ml beaker, pour 100ml of potassium hydroxide solution with a mass concentration of 4%, seal the mouth of the cup with plastic wrap, heat it in a 90°C constant temperature water bath for 2 hours, and put it in the cup Put in a magnet and ...

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Abstract

The invention relates to a method for preparing a cotton cellulose nano fibril film, which comprises the technical steps of 1, chemical pretreatment; 2, mechanical separation; and 3, film preparation. The method has the advantages that the film is prepared by combining acid-base pretreating and grinding wood meal, the method is mainly used for removing lignin in the wood meal under the acidic condition of sodium chlorite, the diluted potassium hydroxide is then used for removing the hemicellulose in the wood meal, the residue is basically cellulose, and finally, the diluted hydrochloric acid is used for splitting the cellulose. The internal hydrogen-bonding acting force of the fibril is reduced through the splitting treatment, so the biomass cellulose nano fibril with high length-diameter ratio is obtained. The hydrochloric acid treatment is utilized to remove the mineral substance in the fiber, the alkaline insoluble hemicellulose of the purified cellulose is influenced, and the effect of purifying the cellulosic fiber is realized. Chemical constituents are detected through Fourier transform infrared. The grinding is simple and easy to operate, and the film can be produced in mass. The elastic modulus is 3463.23 MPa, and the tensile strength is 87.38 MPa.

Description

technical field [0001] The invention relates to a method for preparing a cotton cellulose nanofibril film. 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 during the entire chemical process. Currently, there is a method of oxidation pretreatment, that is, using TEMPO as a medium to catalyze oxidation to pre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21C5/00D21F13/00D06M13/188D06M11/30D06M11/38
Inventor 李大纲薛莹莹胡月潘佳陈振东李明珠李雪婷
Owner SHANDONG LVSEN WOOD PLASTIC COMPOSITE
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