Modified cellulosic fiber obtained through modification of modifier

Abstract

The invention relates to modified cellulosic fiber obtained through modification of a modifier and belongs to the technical field of dope dyeing. The modified cellulosic fiber is prepared from cellulosic fiber through modified treatment by a micromolecule quaternary ammonium salt positive ion modifier and a macromolecule quaternary ammonium salt positive ion modifier as positive ion modifiers; the modified cellulosic fiber has the pH value of 6.5-8.5 and the Zeta electrode potential value of -2-20 mV; the micromolecule quaternary ammonium salt positive ion modifier is an epoxy quaternary ammonium salt compound and the macromolecule quaternary ammonium salt positive ion modifier is cationic starch. According to the invention, the two specific modifiers are adopted to play the synergistic effect, so that salt-free low-alkaline dyeing of the modified cellulosic fiber in the subsequent dyeing can be realized, the pollution is reduced, the cost is decreased, the technology is simplified, the difficulty is lowered, the modified and subsequent dyeing effect is excellent, and the modified cellulosic fiber is applicable to industrialized and large-scale production.

Description

technical field [0001] The invention relates to modified cellulose fiber, more specifically, the invention relates to modified cellulose fiber modified by a modifier, and 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 becomes alkaline. ...

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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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