A kind of preparation method of aqueous solution redispersible cellulose nanofibril

A nanofibril and redispersion technology, applied in the field of cellulose, can solve the problems of not being able to effectively maintain the original performance and pollute the environment, and achieve the effect of universality, simple operation method and good effect
CN110272503BActive Publication Date: 2020-11-24QILU UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
QILU UNIV OF TECH
Publication Date
2020-11-24

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Abstract

The invention relates to a preparation method of aqueous solution redispersible cellulose nano fibrils. The method comprises the following steps: firstly beating the plant fiber raw material, and then performing nano-homogeneous treatment on it to obtain a CNF suspension, adjusting the pH of the prepared CNF suspension, adding a certain amount of potassium chloride, and performing drying treatment. In the method of the present invention, a mechanical method is adopted to prepare CNF, and the yield is relatively high. In the method of the present invention, the pH is adjusted, and the CNF suspension treated with salt is easily redispersed in aqueous solution after vacuum drying, and the stability and other characteristics after redispersion are good, and the method can reduce the storage and transportation costs of cellulose nanofibrils , and the operation is simple, suitable for large-scale production. This provides new ideas and new methods for the high-value utilization of cellulose, and provides a new method for the preparation of aqueous solution redispersible CNF.
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Description

technical field

[0001] The invention belongs to the field of cellulose, and in particular relates to the preparation, drying and aqueous solution redispersion methods of nanometer cellulose. Background technique

[0002] Cellulose is an abundant, renewable and biodegradable natural polymer, which has great application prospects in the production of household chemicals and papermaking, food, printing, cosmetics, oil well drilling, pharmaceuticals and other industries. At the same time, cellulose nanofibrils (CNF) have very broad application prospects due to their nanoscale, high specific surface area, high aspect ratio, low density, renewability and degradability. However, due to the high specific surface area of ​​CNF and the large number of hydroxyl groups on its surface, it leads to the irreversible agglomeration of CNF (film or powder) in the non-polar matrix during the drying process and the agglomeration of CNF (film or powder) in the composite process; The formation o...

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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