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Radiation-modified cellulose emulsifier and akd emulsion prepared by using the emulsifier

A cellulose and emulsifier technology, applied in the directions of non-fiber pulp addition, fiber raw material treatment, water repellent addition, etc., can solve the problems of easy mildew, low retention rate, influence of emulsion stability and sizing effect, etc.

Active Publication Date: 2022-07-01
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 by using the emulsifier
  • Radiation-modified cellulose emulsifier and akd emulsion prepared by using the emulsifier
  • Radiation-modified cellulose emulsifier and akd emulsion prepared by using the emulsifier

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The technical solution of this embodiment 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 The surface absorbed dose of styrene to cellulose induced by Coγ pre-irradiation was 20 Gy, and the unreacted monomers were washed 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 for 7 hours under stirring conditions, and then the products were washed with tetrahydrofuran and deionized water respectively, and dried at 50 ° C for 24 hours. Hour. The above product was added to an appropriate amount of tetrahydrofuran, 300 parts of diethylamine and 30 parts of sodium bicarbonate were added, and the reaction was carried out at 70° C. for 2 hours. Then the pro...

Embodiment 2

[0041] The technical solution of this embodiment 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 The surface absorbed dose of styrene to cellulose induced by Coγ pre-irradiation was 50 Gy, and unreacted monomers were washed 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 for 7 hours under stirring conditions, and then the products were washed with tetrahydrofuran and deionized water respectively, and dried at 50 ° C for 24 hours. Hour. The above product was added to an appropriate amount of tetrahydrofuran, 400 parts of diethylamine and 30 parts of sodium bicarbonate were added, and the reaction was carried out at 70° C. for 2 hours. Then the produc...

Embodiment 3

[0047] The technical solution of this embodiment 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, so that the cellulose is fully swollen, and then repeatedly remove oxygen in a nitrogen environment. use 60The surface absorbed dose of styrene to cellulose induced by Coγ pre-irradiation was 40 Gy, and the unreacted monomer was washed 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 for 7 hours under stirring conditions, and then the products were washed with tetrahydrofuran and deionized water respectively, and dried at 50 ° C for 24 hours. Hour. The above product was added to an appropriate amount of tetrahydrofuran, 350 parts of diethylamine and 50 parts of sodium bicarbonate were added, and the reaction was carried out at 70° C. for 2 hours...

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Abstract

The invention discloses a radiation-modified cellulose emulsifier, which is obtained by reacting epichlorohydrin, triethylamine, radiation-modified cellulose, methanol and water. The radiation-modified cellulose is induced by a radiation method. Styrene is grafted onto the surface of cellulose and then acetylated and aminated. The invention also discloses an AKD emulsion, comprising AKD wax and an effective amount of the radiation-modified cellulose emulsifier. The invention successfully prepares a radiation-modified cellulose emulsifier through a series of cellulose modifications, and further obtains a new type of AKD emulsion with excellent performance. The AKD emulsion has the characteristics of fast curing rate and high sizing degree. It has a wide range of 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 liquid diffusion and penetration, so that it is suitable for writing and moisture resistance. In this process, the neutral sizing agent AKD has received extensive attention due to its good properties. [0003] AKD is a waxy solid, which itself has no charge, so it cannot be retained on the fiber. It needs to use a cationic emulsifier to make it have a positive charge, and it adsorbs 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 later si...

Claims

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Application Information

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Patent Type & Authority Patents(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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