Method for preparing electrolyte-resistant printing paste with straw as raw material

Abstract

The invention relates to the technical field of preparation of a gum used in a textile printing process, and particularly relates to a method for preparing an electrolyte-resistant printing gum by using straw as a raw material. A process method of pretreatment the straw by using an organic solvent, infiltration, alkalization, etherification reaction, neutralization and posttreatment is adopted, and a reaction raw material and a reaction reagent are fully mixed uniformly by high-speed stirring, so that the consumption of the organic solvent is effectively reduced, thus the production cost is lower, and the printing and dyeing cost can be effectively reduced; the reaction raw material and the reaction reagent are fully mixed uniformly by high-speed stirring, and the reaction reagent and the raw material are in full contact, thus the reaction efficiency is effectively increased, and the product substitution degree is higher; meanwhile, through adding sodium tetraborate, the homogeneity of etherification is improved, and the electrolyte-resistant performance of the printing gum is effectively improved; most of lignin and hemicellulose in the crop straw are removed by adopting an organic solvent treatment technology, thus the etherification reaction efficiency of cellulose molecules is increased, a product with high substitution degree is obtained, and the problem that a printed textile is hard in hand feel is solved.

Description

technical field [0001] The invention relates to the technical field of paste preparation used in the textile printing process, in particular to a method for preparing electrolyte-resistant printing paste using straw as a raw material. Background technique [0002] Printing paste is the main component of printing paste, which can transfer dyes and auxiliaries to textiles. It mainly acts as a transfer medium, and its performance directly affects the quality and cost of printed products. The traditional printing paste is sodium alginate. In recent years, with the improvement of printing paste requirements and the rising price of sodium alginate, the substitutes of sodium alginate are being actively researched at home and abroad. Carboxymethyl cellulose is used as paste The development and utilization of materials has been paid attention to. [0003] At present, the application of carboxymethyl cellulose as a printing paste is limited by two factors. On the one hand, the printi...

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Problems solved by technology

[0003] At present, the application of carboxymethyl cellulose as a printing paste is limited by two factors. On the one hand, the printing performance of carboxymethyl cellulose mainly depends on the degree of substitution. The current product has a low degree of substitution or uneven etherification, resulting in the electrolyte resistance of the paste. Poor, more dosage, resulting in increased printing costs, and when preparing printing paste, low substitution degree or uneven etherification carboxymethyl cellulose is easy to react with reactive dyes, and the product is deposited on the surface of the fabric to make the hand feel hard

Second, the main raw material for preparing carboxymethyl cellulose is short-staple cotton, which makes the production cost of carboxymethyl cellulose higher

But the above preparation method has the following disadvantages: 1. The amount of ethanol used in the preparation method is relatively large, the risk in industrialized production is high, and the production cost of carboxymethyl cellulose is increased.

②. The lignin and hemicellulose in the crop straw are combined in the form of covalent bonds, and the cellulose molecules are embedded in it to form a natural barrier, which affects the efficiency of alkalization and etherification reactions, resulting in a low degree of substitution of reactants. Uneven etherification

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