A kind of preparation method of nano cellulose fiber dry powder

A technology of nanocellulose and cellulose, applied in the field of cellulose treatment, can solve the problems of strict reaction conditions, unfavorable cost control, and susceptibility to microbial contamination, and achieves simple and rapid drying process, broadens the scope of practical application, and is easy to store. effect on transport
CN109053906BActive Publication Date: 2021-02-12BEIJING INSTITUTE OF TECHNOLOGYGY +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
BEIJING INSTITUTE OF TECHNOLOGYGY
Publication Date
2021-02-12

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Abstract

The invention relates to a preparation method of nano-cellulose fiber dry powder, which comprises the following steps: 1) taking cellulose, pulverizing and drying to obtain cellulose raw material, which is ready for use; 2) mixing organic acid and alcohol to obtain a reaction liquid, and reacting The mass fraction of organic acid in the liquid is 20-30%. The reaction liquid is heated to 140-160° C., the cellulose raw material obtained in step 1) is added, kept warm and stirred; 3) After the cellulose raw material is fully destroyed and dispersed, the reaction system Carry out solid-liquid separation treatment to obtain reaction recovery liquid and solid powder, and after the solid powder is washed with alcohol, disperse into alcohol to obtain a solid powder dispersion; 4) Homogenize the solid powder dispersion obtained in step 3), Obtaining the nanocellulose fiber dispersion; 5) Evaporating to dryness the alcohol in the nanocellulose fiber dispersion in step 4) to obtain the nanocellulose fiber dry powder.
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Description

technical field

[0001] The invention relates to the field of cellulose treatment, in particular to a preparation method of nano-cellulose fiber dry powder. Background technique

[0002] Cellulose is a macromolecular polysaccharide composed of glucose. It is the most widely distributed and most abundant polysaccharide in nature. It is widely found in the metabolites of plants and some bacteria, and is a valuable natural renewable resource.

[0003] In the microstructure of cellulose fibers, there are crystalline regions where macromolecules are arranged and stacked in an orderly manner and amorphous regions where macromolecules are stacked disorderly. Among them, the physical and chemical properties of the crystalline region are more stable. Thus, smaller sized cellulosic materials, ie nanocellulose materials, are obtained through the destruction of the amorphous regions.

[0004] Cellulose materials at the nanoscale have special physical and chemical properties different fr...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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