Radiation-modified cellulose emulsifier and AKD emulsion prepared utilizing the emulsifier

A cellulose and emulsifier technology, applied in the direction of non-fiber pulp addition, fiber raw material treatment, water repellent addition, etc., can solve the problems of emulsion stability, sizing effect, easy mildew, low retention rate, etc. Achieve the effect of wide application value, high sizing degree and fast curing speed

Active Publication Date: 2019-11-22
SHANGHAI DONGSHENG NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the low charge of starch, the retention rate on the fiber is low, and it is prone to mildew, which will affect the stability of the emulsion and the later sizing effect

Method used

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  • Radiation-modified cellulose emulsifier and AKD emulsion prepared utilizing the emulsifier
  • Radiation-modified cellulose emulsifier and AKD emulsion prepared utilizing the emulsifier
  • Radiation-modified cellulose emulsifier and AKD emulsion prepared utilizing the emulsifier

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Present embodiment technical scheme is as follows:

[0036] 1. First, soak the cellulose in a mixture of styrene and methanol with a styrene concentration of 3 mol / L for 24 hours to fully swell the cellulose, and then repeatedly remove oxygen in a nitrogen environment. use 60 Coγpre-irradiation induced styrene grafting to cellulose with a surface absorption dose of 20Gy. Unreacted monomers were washed away with toluene and dried at 50°C for 24 hours. Then, 100 parts of the above product and 120 g of aluminum chloride were dispersed in an appropriate amount of dichloromethane, and reacted under stirring conditions for 7 hours, and then the product was washed with tetrahydrofuran and deionized water, and dried at 50 ° C for 24 Hour. Add the above product into an appropriate amount of tetrahydrofuran, add 300 parts of diethylamine, and 30 parts of sodium bicarbonate, react at 70°C for 2 hours, then wash the product with distilled water, and dry at 50°C for 24 hours. Fin...

Embodiment 2

[0041] Present embodiment technical scheme is as follows:

[0042] 1. First, soak the cellulose in a mixture of styrene and methanol with a styrene concentration of 5 mol / L for 24 hours to fully swell the cellulose, and then repeatedly remove oxygen in a nitrogen environment. use 60 Coγ pre-irradiation induced styrene grafting to cellulose with a surface absorption dose of 50Gy, washed unreacted monomers with toluene, and dried at 50°C for 24 hours. Then, 100 parts of the above product and 1150 g of aluminum chloride were dispersed in an appropriate amount of dichloromethane, and reacted under stirring conditions for 7 hours, and then the product was washed with tetrahydrofuran and deionized water, and dried at 50 ° C for 24 Hour. Add the above product into an appropriate amount of tetrahydrofuran, add 400 parts of diethylamine, and 30 parts of sodium bicarbonate, react at 70°C for 2 hours, then wash the product with distilled water, and dry at 50°C for 24 hours. Finally, t...

Embodiment 3

[0047] Present embodiment technical scheme is as follows:

[0048] 1. First, soak the cellulose in a mixture of styrene and methanol, the concentration of styrene is 3mol / L, soak for 24 hours to make the cellulose fully swell, and then remove the oxygen repeatedly in a nitrogen environment. use 60Coγpre-irradiation induced styrene grafting to cellulose with a surface absorption dose of 40Gy, washed unreacted monomers with toluene, and dried at 50°C for 24 hours. Then, 100 parts of the above product and 130 g of aluminum chloride were dispersed in an appropriate amount of dichloromethane, and reacted under stirring conditions for 7 hours, and then the product was washed with tetrahydrofuran and deionized water, and dried at 50 ° C for 24 Hour. Add the above product into an appropriate amount of tetrahydrofuran, add 350 parts of diethylamine, and 50 parts of sodium bicarbonate, react at 70°C for 2 hours, then wash the product with distilled water, and dry at 50°C for 24 hours....

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Abstract

The invention discloses a radiation-modified cellulose emulsifier which is obtained by reacting epoxy chloropropane, triethylamine, radiation-modified cellulose, methanol and water, with the radiation-modified cellulose being formed by inducing grafting of styrene to the surface of cellulose by adopting a radiation method and then performing acetylation and amination. The invention also disclosesan AKD emulsion, which comprises AKD wax and an effective amount of the radiation-modified cellulose emulsifier. The radiation-modified cellulose emulsifier is successfully prepared through a series of cellulose modification, then the novel AKD emulsion with excellent performance is obtained, and the AKD emulsion has the advantages of being high in curing rate and high in sizing degree and has wide application value in the field of papermaking.

Description

technical field [0001] The invention relates to the field of AKD sizing agents for papermaking, in particular to a radiation-modified cellulose emulsifier and an AKD emulsion prepared by using the emulsifier. Background technique [0002] The purpose of sizing is to make paper or paperboard resistant to the spread and penetration of liquids, suitable for writing and moisture-resistant. In this process, the neutral sizing agent AKD has received extensive attention due to its good performance. [0003] AKD is a waxy solid, which has no charge itself, so it cannot be retained on the fiber. It needs to use a cationic emulsifier to make it have a positive charge. It is adsorbed on the fiber and reacts with it to produce a sizing effect. In the early days, cationic starch was generally used as an emulsifier. Due to the low charge of starch, the retention rate on the fiber is low, and it is prone to mildew, which will affect the stability of the emulsion and the sizing effect in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H21/16D21H17/04D21H17/66D21H17/39C08F8/32C08F251/02C08F212/08
CPCD21H21/16D21H17/04D21H17/66D21H17/39C08F8/32C08F251/02C08F212/08
Inventor 施晓旦沈安成金霞朝
Owner SHANGHAI DONGSHENG NEW MATERIALS
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