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

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
3 Cites 0 Cited by

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of preparation method of nano cellulose fiber dry powder
  • A kind of preparation method of nano cellulose fiber dry powder
  • A kind of preparation method of nano cellulose fiber dry powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-8

[0036] Embodiment 1-8 is prepared according to the following preparation method:

[0037] 1) Take cellulose / cellulose raw materials (wood pulp powder, M30 refined cotton, bamboo pulp, straw pulp, reed pulp, filter paper), and the scanning electron microscope image of wood pulp powder is as follows: figure 1 As shown, it can be seen that the cellulose is a large fibrous structure. As a comparison, wood pulp powder, bamboo pulp, straw pulp, reed pulp, and filter paper need to be crushed and passed through a 200-mesh sieve, and dried to obtain cellulose raw materials for use;

[0038] 2) Dissolve organic acids (citric acid, oxalic acid, malonic acid, maleic acid) in alcohols (ethylene glycol, propylene glycol, pentylene glycol, n-octanol), and configure the reaction corresponding to the volume of Table 1 liquid, the organic acid mass fraction in the reaction liquid is shown in Table 1. Under stirring conditions, the temperature of the reaction liquid is raised to the parameters i...

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
Login to View More

PUM

PropertyMeasurementUnit
viscosityaaaaaaaaaa
boiling pointaaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

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.

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
Login to View More

Application Information

Patent Timeline
12 Feb 2021
Publication
CN109053906B
IPC
C08B15/00; C08B15/02
CPC
C08B15/00; C08B15/02
Inventors
邵自强; 周逸