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

Abstract

The invention relates to a preparation method of a gelatin modified starch wetting agent, which is characterized by comprising the following steps: (1) pretreatment: drying the raw material starch at 50 DEG C for 24 hours, passing through an 80-mesh screen, mixing 12-20 parts by mass of impurity-removed original starch, 1-3 parts by mass of gelatin and 400 parts by mass of water solution, and reacting at 90 DEG C for 1-3 hours to obtain a modified starch paste solution; (2) proportioning and mixing: sequentially and slowly adding 0.25 part by mass of 50% glutaraldehyde solution, 0.5 part by mass of glycerol, 0.25 part by mass of polyvinyl alcohol, 0.5 part by mass of sodium sulfate and 0.3 part by mass of Tween 60 into the modified starch paste solution to obtain a mixture; and (3) stirring the mixture at 90 DEG C for 1-5 hours to obtain a reaction mixture, cooling the reaction mixture to room temperature, standing for 6 hours, and degassing to obtain the gelatin modified starch wetting agent. The gelatin modified starch wetting agent can be directly used in glass fiber tank kiln wire drawing production and glass fiber textile processing; and the method is simple in preparation technique and easy to operate, has the advantages of environmental protection, low cost and high practicality, and is worthy of popularization.

Description

technical field [0001] The invention belongs to the field of chemically modified starch of a glass fiber surface treatment agent, and in particular relates to a preparation method of a gelatin modified starch type sizing agent. Background technique [0002] Glass fiber is an inorganic non-metallic material with excellent performance. Because of its good insulation, high corrosion resistance, and high mechanical strength, it is widely used as a reinforcing material in composite materials, electrical insulation and thermal insulation materials, circuit substrates and textile production. However, due to its smooth, brittle and non-wear-resistant characteristics, it is necessary to coat a protective film that meets the material process requirements and enhances the mechanical properties of the glass fiber during wire drawing, that is, infiltration agent. The sizing plays a lubricating and bonding role to meet the needs of wire drawing and subsequent textile production. [0003...

AI Technical Summary

Problems solved by technology

[0005] At this stage, the relatively mature technology for cationic modified starch technology is: first enzymatically hydrolyze the original starch with isoamylase to obtain enzymatic starch, and then use cationic agents such as 3-chloro 2-hydroxypropyl ammonium chloride, in the catalyst Cationic modified starch is produced by reacting with enzymatic starch under action, but this method has defects such as complex preparation process, high cost, and poor stability.

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