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Preparation of organic anion particle for particulate retention aid and filtering aid system of papermaking and uses thereof

An organic anion, particle retention technology, applied in the field of pulp and paper

Inactive Publication Date: 2009-07-29
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although traditional particulate retention and drainage systems are widely used, a large amount of research and development efforts are still devoted to better understanding the mechanism of action of retention and drainage systems and their impact on paper performance, as well as the development of new Particulate system

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Weigh 25g of the 8.5th generation dendritic polyamide-amine (PAMAM G8.5-COOCH 3 ) in a 250mL flat-bottomed flask, add an appropriate amount of distilled water to dissolve under magnetic stirring. Then weigh 4.39g of sodium hydroxide solid, dissolve it with an appropriate amount of distilled water, add it to a flat-bottomed flask and mix it with the 8.5th generation dendritic polyamide-amine solution. The reaction concentration was adjusted to 20%, the reaction temperature was 50° C., and the reaction was performed at a constant temperature for 24 hours under magnetic stirring. Then vacuum rotary evaporation was carried out to obtain a light yellow viscous substance. Wash with ether several times, and vacuum dry to obtain the 8.5th generation anionic dendritic polyamide-amine (organic anionic particles G8.5A-PAMAM).

[0025] (2) Add 20% calcium carbonate and 1% AKD sizing agent to the bleached softwood pulp with a concentration of 0.5%. After mixing evenly, add 0.0...

Embodiment 2

[0027] (1) Weigh 30g of the 10.5th generation dendritic polyamide-amine (PAMAM G10.5-COOCH 3 ) in a 250mL flat-bottomed flask, add an appropriate amount of distilled water to dissolve under magnetic stirring. Then weigh 5.5 g of sodium hydroxide solid, dissolve it with an appropriate amount of distilled water, add it into a flat-bottomed flask and mix it with the 10.5th generation dendritic polyamide-amine solution. The reaction concentration was adjusted to 20%, the reaction temperature was 60° C., and the reaction was performed at a constant temperature for 36 hours under magnetic stirring. Then vacuum rotary evaporation was carried out to obtain a light yellow viscous substance. Wash with ether several times, and dry in vacuum to obtain the 10.5th generation anionic dendritic polyamide-amine (organic anionic particles G10.5A-PAMAM).

[0028](2) Add 20% talcum powder and 1% rosin gum to the bleached coniferous wood pulp with a concentration of 0.5%. After mixing evenly, ad...

Embodiment 3

[0029] Example 3: As in Example 1, the difference is that 0.25% of structured silica is added together with 0.25% of organic anion particles G8.5A-PAMAM in step (2).

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Abstract

The invention relates to organic anion particles for a retention and drainage aid system for papermaking wet part particles, a preparation method thereof and application thereof. The organic anion particles are anion dendritic macromolecules prepared by modifying end groups of end ester-group semi-substituted dendritic polyamide-amine. The preparation method comprises a step that a tail end group -COOCH3 on the outer layer of the semi-substituted dendritic polyamide-amine is hydrolyzed under alkali conditions to become -COONa so as to prepare the anionic dendritic polyamide-amine. The anionic dendritic polyamide-amine as the organic particles is used for the retention and drainage aid system for the papermaking wet part particles, and is used as an anionic particle component separately or synergistically with colloid silicon dioxide, structural silicon dioxide or bentonite, so that the retention rate of paper is improved, the drainage property is improved, and the papermaking evenness and the physical property are good.

Description

(1) Technical field [0001] The invention relates to an organic anion particulate papermaking retention and drainage aid, a preparation method and application thereof, and belongs to the technical field of pulping and papermaking. (2) Background technology [0002] Paper machine wet end retention and drainage technology has undergone significant changes in the past two decades. It has been developed from a unit and dual retention and drainage system to a particulate retention and drainage system that can take care of paper retention, water filtration and paper evenness at the same time. Traditional particulate retention and drainage systems consist of cationic polymers and negatively charged inorganic particles. Such as: Compozil system composed of cationic starch and colloidal silicon dioxide, Hydrocol system composed of cationic polyacrylamide and modified bentonite. Usually the cationic high molecular polymer is added to the slurry first, and the cationic polymer molecul...

Claims

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Application Information

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IPC IPC(8): D21H21/10D21H17/55D21H23/14D21H17/68D21H21/16
Inventor 傅英娟秦梦华石淑兰
Owner QILU UNIV OF TECH
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