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Nano-microcrystalline cellulose paint, preparation method thereof, and coated paper prepared using nano-microcrystalline cellulose paint

A technology of microcrystalline cellulose and nanocrystalline, applied in the direction of synthetic cellulose/non-cellulose material pulp/paper, fiber raw material treatment, paper, etc., can solve the problem of low solid content, paper roughness, air permeability and smoothness Poor problems, to achieve high solid content, reduce coating costs, improve air permeability and surface smoothness

Active Publication Date: 2015-04-22
THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the existing paper coating coatings also have the disadvantages of low solid content and poor paper roughness, air permeability and smoothness after coating.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] 1.1 Preparation of modified nanocrystalline cellulose

[0037] Add 100 g of NaOH aqueous solution dropwise to 100 g of chloroacetic acid aqueous solution, add 30 ml of water, cool to room temperature and neutralize to pH=8. Add 120g of dimethylamine into the reaction flask and start stirring, slowly add 100g of epichlorohydrin dropwise and lower the temperature, after the dropwise addition, raise the temperature to 50-60°C and keep it warm for 2 hours to obtain the amphoteric etherification agent. Mix 40g of amphoteric etherifying agent with 200g of NCC suspension, stir with nitrogen gas, heat up to 50°C, and react for 2 hours to obtain amphoteric NCC. Add 20ml of initiator containing cerium ammonium nitrate 0.02g and V0440.1mg in the preparation process; then add 20g urea.

[0038] 1.2 Preparation of coating

[0039]Take 0.2g of amphoteric nano-microcrystalline cellulose, 95g of ground calcium carbonate pigment, 10g of adhesive, 0.15g of bactericide and 0.2g of visco...

Embodiment 2

[0041] 2.1 Preparation of modified nanocrystalline cellulose

[0042] Add 110 g of NaOH aqueous solution dropwise to 110 g of chloroacetic acid aqueous solution, add 30 ml of water, cool to room temperature and neutralize to pH=8. Add 110g of dimethylamine into the reaction bottle and start stirring, slowly add 100g of epichlorohydrin dropwise and lower the temperature, after the dropwise addition, raise the temperature to 50-60°C and keep it warm for 2 hours to obtain the amphoteric etherification agent. Mix 100g of amphoteric etherification agent with 200g of NCC suspension, stir with nitrogen gas, heat up to 50°C, and react for 2 hours to obtain amphoteric NCC. Add 20ml of initiator containing cerium ammonium nitrate 0.2g and V0441.6mg in the preparation process; add 40g urea again.

[0043] 2.2 Preparation of paint

[0044] Take 7g of modified nano-microcrystalline cellulose, 80g of ground calcium carbonate pigment, 15g of adhesive, 3g of bactericide and 3g of viscosity ...

Embodiment 3

[0046] 3.1 Preparation of modified nanocrystalline cellulose

[0047] Add 130 g of NaOH aqueous solution dropwise to 140 g of chloroacetic acid aqueous solution, add 30 ml of water, cool to room temperature and neutralize to pH=8. Add 160g of dimethylamine into the reaction bottle and start stirring, slowly add 100g of epichlorohydrin dropwise and lower the temperature, after the dropwise addition, raise the temperature to 50-60°C and keep it warm for 2 hours to obtain the amphoteric etherification agent. Mix 100g of amphoteric etherifying agent with 200g of NCC suspension, stir with nitrogen gas, heat up to 50°C, and react for 2 hours to obtain amphoteric NCC. Add 30ml of initiator containing cerium ammonium nitrate 0.4g and V0441.2mg in the preparation process; add 60g urea again.

[0048] 3.2 Preparation of paint

[0049] Take 15g of modified nano-microcrystalline cellulose, 70g of ground calcium carbonate pigment, 20g of adhesive, 5g of bactericide, and 5g of viscosity r...

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Abstract

The invention provides a nano-microcrystalline cellulose paint. The nano-microcrystalline cellulose paint comprises amphoteric nano-microcrystalline cellulose, a pigment, an adhesive, a bactericide, and a viscosity modifier at a mass ratio of 0.1-15:70-95:10-20:0.15-5:0.2-5, and also comprises water; and the solid content of the nano-microcrystalline cellulose paint ranges from 15 to 60%. According to the nano-microcrystalline cellulose paint, interaction of amphoteric nano-microcrystalline cellulose with the other ingredients is realized, and the solid content is high, so that it is beneficial for paper coating. And in addition, application of the nano-microcrystalline cellulose paint in paper coating is capable of increasing paper air permeability and surface smoothness, and reducing coating cost.

Description

technical field [0001] The invention belongs to the field of papermaking, in particular to a coating, a preparation method and coated paper using the coating. Background technique [0002] In the field of papermaking, in order to impart certain properties to paper, it is usually necessary to coat one or both sides of the base paper with a coating and then dry it to form a coating. Therefore, as a high-grade printing paper, coated paper must not only meet the printing requirements of various advanced printing machines, but also require printed products to have bright colors, clear and vivid images, and high cost performance. For the improvement of the printability of coated paper, the base paper, coating formula and coating technology are the three main influencing factors. Existing coated papers are faced with poor coating surface roughness leading to poor printing effect. In addition, coating will also affect the whiteness and opacity of paper, thereby affecting the overal...

Claims

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Application Information

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IPC IPC(8): D21H13/00D21H19/38D21H21/36D21H21/16
Inventor 蒋兴宇查瑞涛杨路明张凤山孙佳姝
Owner THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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