Modified cellulose fiber obtained through modification

Abstract

The invention relates to a modified cellulose fiber obtained through modification and belongs to the technical field of textile dyeing. The modified cellulose fiber is obtained by modifying a cellulose fiber through cationic modification agents including a small molecular quaternary ammonium salt cationic modification agent and a high molecular quaternary ammonium salt cationic modification agent, and the Zeta electrode potential value of the modified cellulose fiber is 0-15 mV when the pH value is 6.5-8.5; the small molecular quaternary ammonium salt cationic modification agent is an epichlorohydrin matrix derivative of epoxy quaternary ammonium salt, and the high molecular quaternary ammonium salt cationic modification agent is cationic starch. According to the modified cellulose fiber, the two specific modification agents are adopted and have a synergistic effect, so that the modified cellulose fiber can be subjected to salt-free low-alkali dyeing in a subsequent dyeing process, the pollution can be alleviated, the cost can be reduced, the process can be simplified, the difficulty can be lowered, and the modification and subsequent dyeing effects are good; the process is suitable for large-scale industrialized production.

Description

technical field [0001] The invention relates to a kind of cellulose fiber, more specifically, the invention relates to a kind of modified cellulose fiber obtained through modification, which belongs to the technical field of textile dyeing. Background technique [0002] The dye uptake rate of traditional cellulose fiber dyeing process is generally around 40-70%. The dye uptake rate is low and there are many floating colors. In order to achieve the purpose of color fixation, the hydroxyl groups on the cellulose need to be ionized under strong alkaline conditions, so a large amount of soda ash must be added to the dyeing solution in the later stage of dyeing. The treatment of inorganic salts and alkalis has always been a problem that plagues the industry. A large amount of inorganic salts that are neither recyclable nor degradable are discharged into rivers and lakes, seriously polluting water quality. Due to the high permeability of salt, the surrounding soil is salinized and...

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Problems solved by technology

[0015] The present invention aims to solve the following problems in the process of dyeing the cellulose fibers after modification in order to reduce the consumption of dyes, inorganic salts and alkali in the prior art: The degree of pollution is high, and the discharged wastewater is difficult to treat, causing pollution; and the existing modified cellulose fiber is used for the process of dyeing without salt and low alkali modification, which cannot be applied to large-scale industrial production

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