Method for preparing nanometer cellulose fiber through combining ultrasound and high-pressure homogenization treatment

A technology of nanocellulose and high-pressure homogenization, which is applied in the field of preparation of nanocellulose fibers, can solve the problems of easy interweaving and clustering between fibers, uneven fiber diameter distribution, and low length of nanocellulose fibers, so as to improve tensile strength. The effect of strength, good biocompatibility
CN101851801AInactive Publication Date: 2010-10-06NORTHEAST FORESTRY UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NORTHEAST FORESTRY UNIVERSITY
Publication Date
2010-10-06
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a method for preparing nanometer cellulose fiber through combining ultrasound and high-pressure homogenization treatment, which relates to a preparation method of nanometer cellulose fiber. The invention solves the problems of short length, nonuniform fiber diameter distribution and easy interweaving between fiber into cluster nanometer fiber of the nanometer cellulose fiber prepared by the existing method only using mechanical high-pressure homogenization treatment. The method of the invention comprises the following steps that: 1. biomass fiber is extracted by an alcohol benzene solution; 2. the treatment by acidified sodium chlorite is carried out; 3. alkali liquor gradient treatment is carried out; 4. an ultrasonic cell crushing machine is used for treatment; and 5. high-pressure homogenization treatment is carried out, and nanometer cellulose fiber is obtained after being dried. The fiber diameter distribution is uniform, the length is longer than or equal to 150 mum, the slenderness ratio is larger than or equal to 600, and the fiber is mutually interwoven into a reticular winding structure. The method of the invention is applicable to the preparation of nanometer cellulose fiber from wood pulp, papermaking pulp materials, wood materials, bamboo materials and crop straws.
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Description

technical field

[0001] The invention relates to a method for preparing nanocellulose fibers. Background technique

[0002] With the continuous penetration and development of nanotechnology in the field of cellulose science, the processing of biomass cellulose resources into nanoscale fiber products has attracted increasing attention. According to its own structural characteristics, nanocellulose mainly includes rod-shaped nano-microcrystalline cellulose, granular or needle-shaped cellulose nano-whiskers, and long-length filamentous nano-cellulose fibers. The filamentous nanocellulose fibers have a high aspect ratio and network entanglement structure, which not only enhances the strength of the polymer, but also significantly improves the toughness of the polymer. The research on preparation and properties has become a research hotspot in the field of cellulose science in recent years.

[0003] The existing method of preparing nanocellulose fibers by mechanical high-pressur...

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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