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Cationic polymer grafting modified nanocrystalline cellulose and preparation method and application thereof

A cationic polymer and nano crystallization technology, which is applied in the direction of non-fibrous pulp addition, fiber raw material treatment, textiles and papermaking, etc., can solve the problems of increased white water concentration and ineffective adsorption of polymers, so as to improve physical strength and increase retention rate and system retention rate, the effect of reducing steam

Active Publication Date: 2015-12-02
赵迎辉
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Another disadvantage of these additives is the susceptibility to high conductivity and high content of anionic litter and colloidal substances
As a result, the polymer cannot be effectively adsorbed on the surface of fibers and fine fibers. Since the polymer adsorption is relatively poor under such white water conditions, a large part of the polymer will remain in the white water system and the concentration of white water will increase.

Method used

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  • Cationic polymer grafting modified nanocrystalline cellulose and preparation method and application thereof
  • Cationic polymer grafting modified nanocrystalline cellulose and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0032] raw material Dosage (parts by mass) soft water 60 copies Nanocrystalline Cellulose 15 copies Acrylamide 20 copies Dimethyl diallyl ammonium chloride 2 copies EDTA 0.1 part phosphoric acid 1 copy sodium hydroxide 1 copy Ammonium persulfate 1 copy concentrated sulfuric acid Appropriate amount

[0033] The preparation method comprises the following steps:

[0034] Add soft water 900g in the 2000 milliliter four-necked flask that has turbine stirrer, RTD temperature sensor, reflux condenser and nitrogen inlet pipe, add nano-crystalline cellulose 225g under stirring speed of 120RPM, heat up to 50 while stirring. ℃, after it is completely dissolved, the temperature is raised to 90 ℃ with nitrogen gas, and 1.5g of ethylenediaminetetraacetic acid (EDTA), 15g of phosphoric acid, and 15g of sodium hydroxide are added.

[0035] After stirring evenly, first add 5% ammonium persulfate aqueous solution ...

specific Embodiment 2

[0037] raw material Dosage (parts by mass) soft water 57 copies Nanocrystalline Cellulose 20 copies N,N-Dimethacrylamide 18 copies Dimethyl diallyl ammonium chloride 2 copies EDTA-2Na 0.10 parts phosphoric acid 1 copy sodium hydroxide 1 copy Ammonium persulfate 1 copy concentrated sulfuric acid Appropriate amount

[0038] The preparation method comprises the following steps:

[0039] Add soft water 855g in the 2000 milliliter four-necked flask that has turbine stirrer, RTD temperature sensor, reflux condenser and nitrogen inlet pipe, add nano-crystalline cellulose 300g under the stirrer stirring speed is 120RPM, while stirring, be warming up to 50 ℃, after it is completely dissolved, the temperature is raised to 90 ℃ with nitrogen gas, and 1.5g of EDTA-2Na, 15g of phosphoric acid, and 15g of sodium hydroxide are added.

[0040] After stirring evenly, first add 5% ammonium persulfate aqueous solut...

specific Embodiment 3

[0042] The acrylamide in specific embodiment 1 is replaced by one selected from acrylamide, N,N-dimethylacrylamide, N,N-diethylacrylamide, N-vinylformamide, acrylonitrile A variety of nonionic monomers; the replacement of dimethyl diallyl ammonium chloride in specific embodiment 1 is the methyl chloride selected from dimethyl diallyl ammonium chloride, dimethylaminoethyl acrylate Quaternary ammonium salt, methyl chloride quaternary ammonium salt of dimethylaminoethyl methacrylate, methyl chloride quaternary ammonium salt of diethylaminoethyl methacrylate, methyl chloride quaternary ammonium salt of diethylaminoethyl methacrylate Ammonium salt, dimethylaminopropyl acrylamide methyl chloride quaternary ammonium, dimethylaminopropyl methacrylamide methyl chloride quaternary ammonium, dimethylaminoethyl acrylate benzyl chloride quaternary, Benzyl chloride quaternary ammonium salt of dimethylaminoethyl methacrylate, benzyl chloride quaternary ammonium salt of diethylaminoethyl meth...

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Abstract

The invention discloses cationic polymer grafting modified nanocrystalline cellulose which comprises nanocrystalline cellulose, nonionic monomer used for forming a macromolecule carbon skeleton, and cationic monomer used for introducing positive charge. The nanocrystalline cellulose, the nonionic monomer and the cationic monomer are triggered for copolymerization through free radicals to form a nanocrystalline cellulose cluster, the nonionic monomer is chosen from acrylamide, N, N-dimethyl acrylamide, N, N-diethyl acrylamide, N-vinyl formamide and acrylonitrile, and the cationic monomer is chosen from dimethyl diallyl ammonium chloride, dimethyl amino ethyl acrylate, diethyl amino ethyl acrylate and methyl chlorine quaternary ammonium salt of dimethyl amino propyl acrylamide. The invention further provides application of the cationic polymer grafting modified nanocrystalline cellulose serving as a paper making additive to be added into a wet part of a paper machine so as to improve dry strength, wet strength and first-course retention rate paper or paperboards to lower white water concentration.

Description

technical field [0001] The invention relates to cationic polymer graft-modified nanocrystalline cellulose and its preparation method and application, and belongs to the technical field of polymer graft-modified industrial additives and its preparation and application. Background technique [0002] The paper industry is a chemical processing industry with fibers as raw materials. It is inseparable from the application of various chemicals in all stages of the process of pulping, bleaching, papermaking and post-processing of paper. They can not only endow paper with various special superior properties (such as water resistance, oil resistance, wet strength, dry strength, and cohesive strength properties, etc.), but also make it possible to produce paper with higher comprehensive performance using poor fiber raw materials ; And it can optimize the production process, increase the operating speed of the paper machine, and even greatly reduce environmental pollution, bringing goo...

Claims

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Application Information

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IPC IPC(8): C08F251/02C08F220/56C08F226/02C08F220/54D21H21/18D21H17/45
Inventor 赵迎辉
Owner 赵迎辉
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