A kind of cellulose type II nanocrystalline particle and its preparation method and application

A cellulose and nanocrystal technology, applied in nanotechnology, nanotechnology, chemical instruments and methods, etc., can solve the problem of inability to accurately control product crystallinity, crystallographic defects, difficult to control the surface properties of cellulose nanocrystals, and cellulose nanocrystals. The crystal stays at the research level and other issues to achieve the effect of avoiding excessive degradation, high crystallinity, and high integrity
CN108264569BActive Publication Date: 2020-01-03INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
Publication Date
2020-01-03

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Abstract

The invention relates to the field of cellulose nanocrystals, in particular to a cellulose II type nanocrystal particle and its preparation method and application. The crystallinity of the cellulose II type nano crystal particles is more than or equal to 80%, the number average molecular weight is 1200-2500, and the molecular weight distribution coefficient Mw / Mn is less than or equal to 1.30. The preparation method of the cellulose type II nanocrystalline particles includes: first performing amorphization and reconstruction of the cellulose raw material, recrystallization and acid hydrolysis, and the crystallization and acid hydrolysis can be carried out under low-concentration acidic conditions, and the cellulose nanocrystalline material is realized. efficient, clean production and quality control. The cellulose type II nanocrystalline particles prepared by the method have high crystallinity, small molecular weight, narrow molecular weight distribution, narrow size distribution, clear surface conformation and great surface chemical modification potential, and can be used for catalyst carrier, composite material reinforcement and other purposes.
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Description

Technical field:

[0001] The invention relates to the field of cellulose nanocrystals, in particular to a cellulose II type nanocrystal particle and its preparation method and application. Background technique:

[0002] Cellulose nanocrystals are high-end cellulose materials that have been extensively studied in recent decades. The unique physical, chemical and biological properties such as surface modification have broad application prospects in materials, light industry, chemical industry, food, medicine, health care, environmental protection, information, energy and other fields.

[0003] At present, there are two crystal structures of cellulose nanocrystals, one is cellulose type I, and the other is cellulose type II. Existing cellulose type II nanocrystals are mainly prepared by the following three methods: method one, mercerizing the cellulose raw material, and then carrying out acid-catalyzed hydrolysis treatment to obtain spherical cellulose type II nanocrystals with...

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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