Preparation method and application of anionic fiber modifier

Abstract

The invention relates to a preparation method and application of an anionic fiber modifier. The anionic fiber modifier comprises a main body material 1 and a main body material 2, the main body material 1 mainly takes polyvinyl alcohol and citric acid as raw materials to carry out esterification reaction; then, 2-sorbitol trisodium bicarbonate salt is adopted for grafting; cross-linking reaction with cellulose or starch is performed; the main body material 2 is mainly a copolymer obtained by carrying out a copolymerization reaction on polyvinyl alcohol and maleic anhydride acrylamide; then cross-linking reaction is performed on the grafted product in the preparation method of the main body material 1 and the copolymerization product; and then cross-linking reaction with starch is performed. The anionic fiber modifier can overcome the defects caused by various functional cationic papermaking auxiliaries added in the papermaking process, the mechanical strength of finished paper is improved, the content of components in the range specified by emission prohibition and control indexes in papermaking sewage is greatly reduced, the sewage treatment cost is reduced, and the environmental protection quality is optimized and improved.

Description

technical field [0001] The invention relates to the technical field of polymer composite materials and papermaking technology, in particular to a preparation method and application of an anionic fiber modifier. Background technique [0002] With the rapid development of all walks of life in my country's modernization drive, people's cultural quality and living standards are constantly improving. The most basic materials used in the rapid development and improvement of various industries are various types of finished paper. [0003] In the papermaking industry, in addition to using natural fibers for papermaking, various waste papers are usually used as raw materials in order to achieve green production. Enumeration; the advantages and disadvantages of using various types of waste paper as raw materials (secondary fiber, tertiary fiber and n-time fiber, etc.), the degree of mixing and the amount of impurities are even more indistinguishable. However, in addition to non-wove...

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Problems solved by technology

The finished paper making and sewage treatment process will lead to a large loss of fine fibers in the white water under the net, the loss ratio is 3.0-9.0%, and the sludge concentration is greatly increased, the increase rate is 3.0-11.0%

[0004] Repeatedly like this, with the continuous increase of the number of cycles, it brings great obstacles and pressures to the improvement of environmental protection quality: the COD (oxygen consumption of compounds in sewage) value in sewage exceeds the standard and reaches 3600-5600 mg / L, TN ( total nitrogen) exceeded the standard value of 160 ~ 300mg / L

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