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Guanidine salt grafted starch multifunctional papermaking additive and preparation method thereof

A technology of grafting starch and papermaking auxiliaries, applied in the direction of adding paper and reinforcing agents, etc., can solve problems such as harm to health, bacterial growth, and inability to impart antibacterial properties to paper.

Inactive Publication Date: 2014-04-16
FUJIAN AGRI & FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since starch itself does not have any antibacterial effect, nor can it impart antibacterial properties to paper, it is easy to cause the growth and reproduction of bacteria in paper after using starch, thus endangering people's health

Method used

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  • Guanidine salt grafted starch multifunctional papermaking additive and preparation method thereof
  • Guanidine salt grafted starch multifunctional papermaking additive and preparation method thereof
  • Guanidine salt grafted starch multifunctional papermaking additive and preparation method thereof

Examples

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Effect test

Embodiment １

[0019] (1) Starch is added to 1 mol / L sodium periodate solution, heated and reacted at 30°C for 4 hours, the product is filtered, washed and dried to obtain dialdehyde starch; the mole of sodium periodate and starch The ratio is 1:1.

[0020] (2) Disperse the dialdehyde starch obtained in step (1) in distilled water, add guanidine hydrochloride and react at 30°C for 2 hours, filter, wash and dry the product to obtain guanidine salt grafted starch; the guanidine salt and bis The molar ratio of aldehyde starch is 1:1.

Embodiment 2

[0022] (1) Starch is added to 1.5 mol / L sodium periodate solution, heated and reacted at 40°C for 4h, the product is filtered, washed and dried to obtain dialdehyde starch; the mole of sodium periodate and starch The ratio is 1:1.2.

[0023] (2) Disperse the dialdehyde starch obtained in step (1) in distilled water, add guanidine hydrochloride and react at 50°C for 2 hours, filter, wash and dry the product to obtain guanidine salt grafted starch; the guanidine salt and bis The molar ratio of aldehyde starch is 1:5.

Embodiment 3

[0025] (1) Starch is added to 2 mol / L sodium periodate solution, heated and reacted at 50°C for 4 hours, and the product is filtered, washed and dried to obtain dialdehyde starch; the mole of sodium periodate and starch The ratio is 1:1.5.

[0026] (2) Disperse the dialdehyde starch obtained in step (1) in distilled water, add metformin hydrochloride (this proves that "metformin hydrochloride" can also be used in the present invention) and react at 60°C for 2 hours, filter, wash and dry the product to obtain Guanidine salt grafted starch; the molar ratio of the guanidine salt to dialdehyde starch is 1:10.

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Abstract

The invention discloses a guanidine salt grafted starch multifunctional papermaking additive and a preparation method thereof. The method comprises the following steps: adding starch into a sodium periodate solution, heating and reacting for 4 hours, filtering the product, washing and drying to obtain dialdehyde starch; dispersing the dialdehyde starch in distilled water, adding a guanidine salt and reacting at a certain temperature for 2 hours, filtering the product, washing, drying, and obtaining guanidine salt grafted starch; and finally, coating the guanidine salt grafted starch on the paper surface, and preparing high-strength high-antibacterial property functional paper. The guanidine salt grafted starch multifunctional papermaking additive is coated on the paper surface, so that the paper simultaneously has high strength and high antibacterial property, and the two defects of low strength and low antibacterial property of the paper are improved. Therefore, the multifunctional papermaking additive has high application value.

Description

technical field [0001] The invention relates to a multifunctional auxiliary agent for papermaking, in particular to a multifunctional papermaking auxiliary agent grafted with guanidinium salt and a preparation method thereof. Background technique [0002] In the paper industry, starch plays an important role. Starch can be used for wet end addition, which can play the role of reinforcement, retention and drainage aid; used for surface sizing of paper, it can improve the surface strength of paper and improve printing performance; used for coating processed paper can improve the printing performance of paper and printing effects. In addition, starch has the advantages of abundant resources, cheap price, stable supply, convenient use, chemical modification and biodegradability. Therefore, starch and its derivative products have been widely used in the paper industry. There are two types of starches, amylose and amylopectin. Amylose contains several hundred glucose units, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B33/08C08B35/08D21H21/18D21H21/36
Inventor 刘凯陈礼辉黄六莲林新兴
Owner FUJIAN AGRI & FORESTRY UNIV
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