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Preparation of oxidative degradation starch-based sticking agent

An oxidative degradation, starch-based technology, used in paper, textiles and papermaking, non-fiber pulp addition, etc., can solve the problems of excessive flocculation of pulp, poor paper uniformity and strength, and achieve improved paper strength and stability. good water solubility

Active Publication Date: 2012-05-02
临沂三水科技有限公司
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AI Technical Summary

Problems solved by technology

However, the starch molecular weight is too large, and the high cationic starch obtained by direct cationization is easy to cause excessive flocculation of the pulp, resulting in poor paper evenness and strength

Method used

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  • Preparation of oxidative degradation starch-based sticking agent
  • Preparation of oxidative degradation starch-based sticking agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 1.1 Preparation of oxidative degradation starch

[0020] Take 15g of absolutely dry starch into a four-necked flask, add 23.4ml of distilled water to prepare a starch slurry. Adjust the pH value of the starch slurry to 9 with sodium hydroxide solution and place it in a water bath at 40°C. Slowly add 6.64ml of oxidant with a dropping funnel, stir and react for 5h at 100r / min, adjust the pH value to 6-7 with hydrochloric acid solution, add appropriate amount of sodium bisulfite to reduce the remaining oxidant and terminate the reaction. Repeated washing, suction filtration and vacuum drying to obtain oxidatively degraded starch;

[0021] The oxidatively degraded starch was formulated into a 6% starch slurry, and it was gelatinized at 95°C for 40 minutes, and its viscosity was measured at 95°C with a Brookfield rotational viscometer to be 12.2cp.

[0022] 1.2 Preparation of oxidative degradation starch-based fixative

[0023] Weigh 1.3g of sodium hydroxide in a 250ml beaker, dis...

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Abstract

The invention belongs to the field of chemical industry, in particular to the pulping and papermaking industry, and particularly relates to a preparation method for a novel starch-based sticking agent. The oxidative degradation starch sticking agent is subjected to double modification of oxidative degradation and cationization, so that the prepared product has very high water solubility and amphiprotic characteristic; the oxidative degradation starch-based sticking agent can be used for effectively controlling the dissolved and colloid substances in a sizing agent, and the papermaking strength can be enhanced; and when the obtained product is used on a paper production line, the product is dissolved at the room temperature in a simple dissolving groove without adding extra pasting equipment or degradation reaction facility, the product taking process is greatly simplified, and the product taking stability is enhanced.

Description

Technical field [0001] The invention belongs to the chemical field, especially the pulp and paper industry, and particularly relates to a method for preparing a novel starch-based fixing agent. Background technique [0002] The proportion of mechanical pulp, chemical mechanical pulp, and waste paper pulp in the fiber raw material structure of my country's paper industry is increasing year by year, which greatly improves the utilization rate of fiber. However, a large amount of fine fibers, lignin and resin extracts are produced in mechanical pulping; chemical mechanical pulp contains anionic hemicellulose, oxidized lignin, resin oxidation reduction and fat oxidation reduction; there are adhesive particles such as ink particles in waste paper pulp These substances constitute negatively charged dissolved and colloidal substances. Its accumulation will have a great adverse effect on the continuous operation of the paper machine and the quality of the finished paper, while reducing ...

Claims

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Application Information

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IPC IPC(8): D21H17/29
Inventor 王立军邸同舟罗灵芝李国栋查瑞涛
Owner 临沂三水科技有限公司
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