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Glyoxal cross-linked polymer modified nano crystalline cellulose as well as preparation method and application thereof

A technology of cross-linked polymer and nano-crystal, applied in the direction of reinforcing agent addition, etc., can solve the problems of ineffective adsorption of polymers, decrease of dehydration rate of wet paper web, increase of dry strength of paper, etc., so as to improve system retention rate, physical The effect of strength improvement and retention rate improvement

Inactive Publication Date: 2015-11-25
赵迎辉
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] A disadvantage of these additives of the prior art is that while increasing the dry strength of the paper, it has an effect on the operation of the paper machine, especially on the speed of large high-speed paper machines, due to the reduction of the dewatering rate of the wet paper web.
Another disadvantage of the additives of these technologies is the susceptibility to high conductivity and high content of anionic litter and colloidal substances
As a result, the polymer cannot be effectively adsorbed on the surface of fibers and fine fibers. Since the polymer adsorption is relatively poor under such white water conditions, a large part of the polymer will remain in the white water system and the concentration of white water will increase.

Method used

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  • Glyoxal cross-linked polymer modified nano crystalline cellulose as well as preparation method and application thereof
  • Glyoxal cross-linked polymer modified nano crystalline cellulose as well as preparation method and application thereof
  • Glyoxal cross-linked polymer modified nano crystalline cellulose as well as preparation method and application thereof

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Experimental program
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Effect test

specific Embodiment 1

[0034] A preparation method of glyoxal cross-linked polymer modified nanocrystalline cellulose provided in this example, the main raw materials used and the amount of feed are shown in the following table:

[0035]

[0036] The preparation method comprises the following steps:

[0037] Add 1200g of soft water to a 2000ml flask with a turbine stirrer and RTD temperature sensor, add 90g of nanocrystalline cellulose at a stirring speed of 120RPM, heat up to 50°C while stirring, and cool to room temperature after completely dissolving.

[0038] Polyacrylamide polymer (molecular weight 10,000 daltons) 135g, polydimethyldiallylammonium chloride polymer (molecular weight 10,000 daltons) 15g, tetrasodium diphosphate decahydrate 30g, glyoxal 30g , after stirring evenly, adjust the pH value to 8.5 with appropriate amount of sodium hydroxide and dilute sulfuric acid.

[0039] After reaching the desired viscosity, adjust the pH with an appropriate amount of concentrated sulfuric acid ...

specific Embodiment 2

[0043] A preparation method of glyoxal cross-linked polymer modified nanocrystalline cellulose provided in this example, the main raw materials used and the amount of feed are shown in the following table:

[0044]

[0045] The preparation method comprises the following steps:

[0046] Add 1230 g of soft water to a 2000 ml flask with a turbine stirrer and RTD temperature sensor, add 75 g of nanocrystalline cellulose at a stirring speed of 120 RPM, heat up to 50 ° C while stirring, and cool to room temperature after completely dissolving.

[0047] Poly N,N-dimethylacrylamide polymer (molecular weight 12,000 Daltons) 120g, polydimethyldiallylammonium chloride polymer (molecular weight 10,000 Daltons) 15g, decahydrate diphosphate tetra Sodium 30g, glyoxal 30g, after stirring evenly, adjust the pH value to 8.5 with appropriate amount of sodium hydroxide and dilute sulfuric acid.

[0048] After reaching the desired viscosity, adjust the pH with an appropriate amount of concentr...

specific Embodiment 3

[0052] The monomer of poly N,N-dimethylacrylamide in specific example 2 is replaced by acrylamide, N,N-dimethylacrylamide, N,N-diethylacrylamide, N-vinyl One or more nonionic monomers in formamide, acrylonitrile; the monomer of polydimethyldiallyl ammonium chloride in specific embodiment 2 is replaced by being selected from dimethyldiallyl chloride Ammonium, quaternary ammonium methyl chloride of dimethylaminoethyl acrylate, quaternary methyl chloride of dimethylaminoethyl methacrylate, quaternary methyl chloride of diethylaminoethyl acrylate, methyl methyl chloride quaternary ammonium salt of diethylaminoethyl acrylate, methyl chloride quaternary ammonium salt of dimethylaminopropyl acrylamide, methyl chloride quaternary ammonium salt of dimethylaminopropyl methacrylamide, acrylic acid di Benzyl chloride quaternium salt of methylaminoethyl ester, benzyl chloride quaternium salt of dimethylaminoethyl methacrylate, benzyl chloride quaternium salt of diethylaminoethyl acrylate, ...

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Abstract

The invention discloses glyoxal cross-linked polymer modified nano crystalline cellulose. The glyoxal cross-linked polymer modified nano crystalline cellulose comprises two or more nano crystalline celluloses which are connected through a cross-linked polymer to form a nano crystalline cellulose cluster; the cross-linked polymer is formed by crosslinking a polymer formed through prepolymerization of nonionic monomers and a polymer formed through prepolymerization of cationic monomers via glyoxal; the nonionic monomers are selected from one or more of acrylamide, N,N-dimethyl acrylamide, N,N-diethyl acrylamide, N-vinylformamide and acrylonitrile; the cationic monomers are selected from one or more of methyl chloride or benzyl chloride quaternary ammonium salts of dimethyl diallyl ammonium chloride, dimethylaminoethyl acrylate and 2-(diethylamino)ethyl acrylate. The invention further provides application of glyoxal cross-linked polymer modified nano crystalline cellulose added into a paper machine's wet part as a papermaking additive.

Description

technical field [0001] The invention relates to a glyoxal cross-linked polymer modified nanocrystalline cellulose and its preparation method and application, belonging to the technical field of polymer modified industrial additives and its preparation and application. Background technique [0002] The paper industry is a chemical processing industry with fibers as raw materials. It is inseparable from the application of various chemicals in all stages of the process of pulping, bleaching, papermaking and post-processing of paper. They can not only endow paper with various special superior properties (such as water resistance, oil resistance, wet strength, dry strength, and cohesive strength properties, etc.), but also make it possible to produce paper with higher comprehensive performance using poor fiber raw materials ; And it can optimize the production process, increase the operating speed of the paper machine, and even greatly reduce environmental pollution, bringing goo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L33/26C08L1/02C08L39/00C08K5/07C08J3/24D21H21/18
Inventor 赵迎辉
Owner 赵迎辉
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