A kind of preparation method of chitosan modified starch type sizing agent

Abstract

The invention discloses a preparation method of chitosan modified starch impregnating compound. The preparation method is characterized in that the preparation method comprises the following steps: taking 9-18 parts by mass of raw starch to a reaction container, and adding 300 parts by mass of water; stirring and raising temperature to 90 DEG C; pasting for 1 hour and obtaining starch paste; taking 1-3 parts by mass of chitosan in the starch paste, and orderly adding 0.1-0.6 parts by mass of cross-linking agent, 0.1-0.6 parts by weight of plasticizer, 0.2 parts by weight of polyving akohol, 0.2 parts by weight of sodium sulfate and 0.1 parts by weight of Twain 60 under the condition of stirring, and obtaining a mixture; reacting the mixture at 90 DEG C for 1-5 hours, cooling to room temperature, and placing for 2 hours; defoaming, and obtaining the chitosan modified starch impregnating compound. By adopting the preparation method of the chitosan modified starch impregnating compound, the technique is simple and cost is low; the product can be directly applied to wiredrawing production of glass fiber tank furnace, glass fiber textile processing, and other domains; the using effect is good.

Description

technical field [0001] The invention belongs to the preparation of a sizing agent used in glass fiber processing, and relates to a preparation method of a chitosan modified starch type sizing agent. The chitosan-modified starch-type sizing agent prepared by the invention is especially suitable for the glass fiber tank kiln wire drawing production, glass fiber textile processing and other fields. Background technique [0002] Glass fiber is an inorganic non-metallic material with excellent performance. It has various types and excellent performance. Since glass fiber is a material with a smooth surface, brittle and not resistant to friction, it is necessary to coat a protective film that acts as a lubricant and a bond, that is, a sizing agent, to meet the needs of wire drawing and subsequent textile production. needs, and finally meet the process requirements and mechanical properties of reinforced materials. The method of coating the sizing agent is: during production, the...

AI Technical Summary

Problems solved by technology

The use of paraffin-type infiltrating and sizing agents is limited because the color-fixing agent used in them is irritating to human skin, the preparation is complicated, and it is difficult to add and desizing.

With the development of kiln wire drawing technology, modified starch-type sizing agents have been well developed and applied. In the prior art, starch modification of sizing agents mainly includes enzymatic modification, etherification modification, and esterification modification. properties, cationic modification, etc., among which cationic modified starch is a research hotspot in recent years. This is because the surface of glass fiber has negative charge characteristics, while cationic modified starch has positive charge characteristics. Affinity and glass fiber have better adhesion and compatibility; the current relatively mature cationic modified starch technology is: first enzymatically hydrolyze the original starch with isoamylase to obtain enzymatic starch, and then use 3-chloro 2 Cationic agents such as hydroxypropyl ammonium chloride react with enzymatic starch under the action of a catalyst to generate cationic modified starch. The cationic modified starch prepared by this method has been used in glass fiber sizing agents to a certain extent, but , this method also has defects such as complex preparation process, high cost, poor stability, etc.

[0004] In the prior art, there are no literature reports on the use of chitosan-modified starch-type sizing agent in glass fiber kiln wire drawing production and glass fiber textile processing.

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