Cation polyacrylamide retention and drainage aids and preparation method thereof

A polyacrylamide, retention and drainage aid technology, applied in the direction of retention aid addition, paper, textiles and papermaking, etc., can solve the problems such as the difficulty of direct modification, and achieve the goal of improving water filtration performance and retention rate Effect

Active Publication Date: 2016-12-07
INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, natural bamboo is a solid material that is infusible and insoluble. The surface chemical structure is stable, and the active groups are less exposed, so it is difficult to directly modify it.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A cationic polyacrylamide retention and drainage aid used in papermaking technology, which is prepared by the following method:

[0027] (1) sieve after fresh moso bamboo raw material is pulverized, get 40-60 order component;

[0028] (2) Atmospheric pressure liquefaction; get 100 parts of bamboo powder, 20 parts of concentrated sulfuric acid and 500 parts of ethanol, the reaction temperature is 180 ° C, the reaction time is 60 min, and after filtration, cationic monomer solution is obtained, with a yield of 95.5%;

[0029] (3) Synthesis of cationic polyacrylamide retention and drainage aid: 500 parts of acrylamide, 100 parts of bamboo liquefaction product, 1 part of potassium persulfate initiator, 5 parts of N-N' methylenebisacrylamide crosslinking agent, Ammonia water was used to adjust the pH value to 8, and the self-heating reaction was carried out for 120 minutes, and the finished product was obtained after cooling.

[0030] Evaluation of retention effect: blank p...

Embodiment 2

[0034] A cationic polyacrylamide retention and drainage aid used in papermaking technology, which is prepared by the following method:

[0035] (1) sieve after fresh moso bamboo raw material is pulverized, get 40-60 order component;

[0036] (2) Atmospheric pressure liquefaction; take 100 parts of bamboo powder, 20 parts of methanesulfonic acid and 500 parts of ethylene glycol, the reaction temperature is 180 ° C, the reaction time is 60 min, and the cationic monomer solution is obtained after filtration, with a yield of 98.5%;

[0037] (3) Synthesis of cationic polyacrylamide retention and drainage aid: 500 parts of acrylamide, 100 parts of bamboo liquefaction product, 1 part of ammonium persulfate initiator, 8 parts of N-N'methylenebisacrylamide crosslinking agent, Ammonia water was used to adjust the pH value to 8, react with self-heating for 100 minutes, and discharge after cooling to obtain the finished product.

[0038] Evaluation of retention effect: blank paper sample...

Embodiment 3

[0042] A cationic polyacrylamide retention and drainage aid used in papermaking technology, which is prepared by the following method:

[0043] (1) sieve after fresh moso bamboo raw material is pulverized, get 40-60 order component;

[0044] (2) Atmospheric pressure liquefaction; get 100 parts of bamboo powder, 30 parts of ethanethiol sulfonic acid, 400 parts of ethylene glycol and 200 parts of ethanol, the reaction temperature is 160 ° C, the reaction time is 90 min, and the cationic monomer solution is obtained after filtration. 98.3%;

[0045] (3) Synthesis of cationic polyacrylamide retention and drainage aid: 500 parts of acrylamide, 90 parts of bamboo liquefaction product, 1 part of ammonium persulfate initiator, 9 parts of N-N'methylenebisacrylamide crosslinking agent, Ammonia water was used to adjust the pH value to 8, react with self-heating for 90 minutes, and discharge after cooling to obtain the finished product.

[0046] Evaluation of retention effect: the weigh...

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Abstract

The invention discloses cation polyacrylamide retention and drainage aids. The cation polyacrylamide retention and drainage aids are characterized in that cation polyacrylamide retention and drainage aids take a liquefied product for conducting acid catalytic liquefaction on bamboo wood in an alcohols solvent as a cation monomer, cation polyacrylamide is modified, and the cation polyacrylamide retention and drainage aids are obtained. The invention further discloses a preparation method of the cation polyacrylamide retention and drainage aids. According to the cation polyacrylamide retention and drainage aids and the preparation method thereof, the retention rate of paper pulp can be effectively increased, the smoothness, evenness and strength of the surface of the paper are improved, and meanwhile compared with a conventional polyacrylamide product, the biodegradability of cation modified polyacrylamide is greatly improved.

Description

technical field [0001] The present invention relates to the technical field of papermaking chemicals, in particular to a synthetic process for utilizing the liquefaction product of acid-catalyzed liquefaction of bamboo in an alcoholic solvent as a cationic monomer, and modifying cationic polyacrylamide as a new type of retention and drainage aid in the papermaking process . Background technique [0002] The structure of cationic polyacrylamide is based on acrylamide monomer as the main structural unit, which is connected to functional cationic monomer through copolymerization reaction. Its molecular weight is relatively high, and the molecule has a three-dimensional network structure in aqueous solution, which has a strong flocculation effect. In addition, the modified cationic group can effectively adsorb the negatively charged fine fibers on the surface of the slurry, and "charge Adsorption" and "bridging and cross-linking" methods adsorb the fine components that were ori...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F289/00C08F220/56C08F222/38D21H21/10D21H17/44D21H17/45
CPCC08F289/00D21H17/44D21H17/45D21H21/10C08F220/56C08F222/385
Inventor 焦健房桂干冉淼梁芳敏韩善明邓拥军沈葵忠施英乔李红斌丁来保盘爱享张华兰林艳梁龙田庆文李萍庄国俊李漫周静
Owner INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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