Preparation method and application of chitosan modified talcum powder papermaking filler

A chitosan modification and paper-making filler technology, which is applied in the field of paper-making industry, can solve the problems of increased modification cost and troublesome solvent reuse, and achieve good biocompatibility, simple operation and good adsorption effect

Active Publication Date: 2013-02-20
HUZHOU ZHILI CHILDRENS CLOTHING DEV
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Problems solved by technology

When cellulose is used as a modifier, it needs to be dissolved in solvents such as particle liquid and NMMO, which not only significantly increases the cost of modification, but also has inconveniences such as troublesome solvent reuse.

Method used

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  • Preparation method and application of chitosan modified talcum powder papermaking filler
  • Preparation method and application of chitosan modified talcum powder papermaking filler
  • Preparation method and application of chitosan modified talcum powder papermaking filler

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Embodiment Construction

[0078] The embodiments of the present invention will be described in detail below.

[0079] 2.1 Because filling can reduce costs, improve the optical properties of paper, and at the same time reduce energy consumption and improve paper machine operation, it is widely used by paper companies. At the same time, there are many problems, especially under high filling amount, the main problem is the decrease of paper strength and poor filler retention. In order to overcome the shortcomings of the existing filling and reduce the negative impact of filling, the research on the surface modification of fillers was conceived.

[0080] Chitosan has hydroxyl and amino structures, and can form hydrogen bonds with pulp fibers after paper is made. Using it to modify the surface of fillers can increase the bonding force between fillers and fibers and improve paper performance.

[0081] This part mainly studies the preparation process of chitosan modified talcum powder: investigate the effect...

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Abstract

The invention discloses a preparation method and application of chitosan modified talcum powder papermaking filler. The preparation method of chitosan modified talcum powder papermaking filler comprises the following steps of: 1) mixing talcum powder and water and stirring uniformly to obtain mixed liquid, wherein the talcum powder accounts for 5-15% of the mixed liquid by mass; 2) adding chitosan with viscosity of 30-950cps into an acetic acid solution, and stirring uniformly to obtain a chitosan-acetic acid solution with concentration of 2-7g/L; 3) mixing the mixed liquid obtained in the step 1 and the chitosan-acetic acid solution obtained in the step 2, and stirring at a speed of 300-1,100r/min for 5-100min, wherein the mass of the chitosan-acetic acid solution accounts for 1-11% of the total mass of the mixed solution; 4) continuously stirring the mixed solution obtained in the step 3, slowly dropwise adding a sodium hydroxide solution with mass fraction of 5%, and adjusting the pH value of the solution to 6-14; and 5) continuously stirring the solution obtained in the step 4 so that the chitosan molecules adsorbed on the filler surface are cured to form a layer of dense chitosan deposited film to obtain a modified filler suspension.

Description

technical field [0001] The invention belongs to the technical field of papermaking industry, and in particular relates to a preparation method of chitosan modified talcum powder and its application as a papermaking filler in papermaking. On the one hand, it dissolves chitosan and mixes it with talcum powder, and then precipitates chitosan to form a modified filler. The preparation process is convenient, easy to operate, and has no environmental pollution and high coating efficiency; on the other hand, the The modified filler is used for paper filling. When the ash content reaches 30%, the tensile strength of the paper filled with unmodified talcum powder increases by 64%, and the retention performance of paper material is also significantly improved. Background technique [0002] For a long time, fillers have been widely used in the paper industry. The application of fillers can not only significantly reduce the cost of raw materials, improve the performance and grade of pap...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H17/69
Inventor 薛国新余洋
Owner HUZHOU ZHILI CHILDRENS CLOTHING DEV
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