A kind of chitosan modified cationic starch emulsifier and the method for preparing AKD emulsion thereof

A cationic starch and chitosan modification technology, which is applied in the direction of water-repellent addition, inorganic compound addition, non-fiber pulp addition, etc., can solve the problems of lack of research on technology application and few research reports, and achieve remarkable sizing effect , good stability and improved sizing effect

Active Publication Date: 2022-04-12
龙游富田造纸精化有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] For the concept of green environmental protection and the operating characteristics of the papermaking system, using cheap and widely used cationic starch as the main body of the emulsifier, modifying it by cross-linking means is an effective means to improve its emulsifying performance, but the relevant research reports are less Few, lack of research on related technology applications

Method used

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  • A kind of chitosan modified cationic starch emulsifier and the method for preparing AKD emulsion thereof
  • A kind of chitosan modified cationic starch emulsifier and the method for preparing AKD emulsion thereof
  • A kind of chitosan modified cationic starch emulsifier and the method for preparing AKD emulsion thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) By mass, 1 part of chitosan is dissolved in acetic acid with a mass concentration of 1%, and magnetically stirred to make it evenly dispersed.

[0023] (2) By mass, take 10 parts of cationic starch and gelatinize at 80°C for 30 minutes, then heat up to 90°C, add the chitosan solution and cross-linking agent prepared by dissolving step (1) under magnetic stirring, and add an appropriate amount of water , stirred and reacted for 90 minutes to prepare a modified cationic starch emulsifier.

[0024] (3) The above chitosan-modified cationic starch emulsifier was poured into 10 parts of AKD wax sheet liquid at one time, and stirred at a high speed of 10000 r / min for 3 minutes to prepare the AKD emulsion.

[0025]

Embodiment 2

[0027] (1) By mass, 1 part of chitosan is dissolved in acetic acid with a mass concentration of 1%, and magnetically stirred to make it evenly dispersed.

[0028] (2) By mass, take 10 parts of cationic starch and gelatinize at 80°C for 30 minutes, then heat up to 90°C, add the chitosan solution and cross-linking agent prepared by dissolving step (1) under magnetic stirring, and add an appropriate amount of water , stirred and reacted for 90 minutes to prepare a modified cationic starch emulsifier.

[0029] (3) The above chitosan-modified cationic starch emulsifier was poured into 15 parts of AKD wax sheet liquid at one time, and stirred at a high speed of 10000 r / min for 3 minutes to prepare the AKD emulsion.

[0030]

Embodiment 3

[0032] (1) By mass, 1 part of chitosan is dissolved in acetic acid with a mass concentration of 1%, and magnetically stirred to make it evenly dispersed.

[0033] (2) By mass, take 10 parts of cationic starch and gelatinize at 80°C for 30 minutes, then heat up to 90°C, add the chitosan solution and cross-linking agent prepared by dissolving step (1) under magnetic stirring, and add an appropriate amount of water , stirred and reacted for 90 minutes to prepare a modified cationic starch emulsifier.

[0034] (3) The above chitosan-modified cationic starch emulsifier was poured into 20 parts of AKD wax sheet liquid at one time, and stirred at a high speed of 10000 r / min for 3 minutes to prepare AKD emulsion.

[0035]

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Abstract

The invention provides a chitosan modified cationic starch emulsifier and a method for preparing AKD emulsion thereof. The chitosan modified cationic starch emulsifier is obtained by reacting chitosan, cationic starch and crosslinking agent glutaraldehyde. It contains cationic starch, chitosan grafts and unreacted chitosan and cationic starch. Compared with cationic starch emulsifier, the sizing effect of chitosan-modified cationic starch emulsified by AKD is more significant. The KAD emulsion prepared by using this emulsifier has the advantages of good stability, small dairy particle size, environmental protection, and no organic chlorine, and can be applied to the preparation of food packaging paper.

Description

technical field [0001] The invention belongs to the technical field of papermaking AKD sizing, and more specifically relates to a chitosan modified cationic starch emulsifier and a method for preparing AKD emulsion. Background technique [0002] Reactive neutral sizing agent AKD is a sizing agent widely used in paper mills. However, since AKD is a water-insoluble wax body, it is often necessary to add an emulsifier before sizing the slurry or surface sizing to obtain an AKD emulsion before it can be used. Cationic starch is an emulsifier and stabilizer widely used in papermaking AKD sizing, and it has the advantage of being cheap. In order to explore the potential of cationic starch as AKD sizing application, various polymer emulsifiers have been successively used as emulsified paper sizing agent AKD. With the increasing awareness of environmental protection, the application of natural renewable polymers such as guar gum, sodium alginate and chitosan has become more and mo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H17/17D21H17/29D21H17/37D21H17/68D21H19/14D21H19/20D21H21/16C08B31/12C08G81/00
CPCD21H17/17D21H17/29D21H17/37D21H17/68D21H19/14D21H19/20D21H21/16C08B31/125C08G81/00
Inventor 周建恩周游钟庆辉陈兴理毛进仙
Owner 龙游富田造纸精化有限公司
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