Environment-friendly chlorine-free composite wool fiber, and preparation method and application thereof

Abstract

The invention discloses an environment-friendly chlorine-free composite wool fiber and a preparation method thereof. The preparation method comprises the steps of pre-drafting the wool fiber; coatingthe surface of the wool fiber with a reinforced adhesive solution; feeding into a coagulating bath, and coagulating a colloid on the surface of the wool fiber; washing with water and drafting to obtain a wool fiber coated with an adhesive layer, wherein the reinforced adhesive solution is a keratin composite adhesive solution; and feeding into a milk protein fiber spinning solution, and solidifying, drafting, drying and shaping to obtain the refined environment-friendly chlorine-free composite wool fiber. The environment-friendly chlorine-free composite wool fiber can reach the fineness of anordinary refined wool fiber, and even if the wool fiber is not subjected to early-stage chemical pretreatment and later-stage setting treatment, the fiber can still be permanently fixed at a new position, the fineness and the length of the fiber are kept unchanged, and the shrinkage is extremely small; pollution waste liquid cannot be generated in the refining process, so that the environment protection is achieved; and the prepared composite fiber has excellent mechanical properties, extremely high surface smoothness and a cashmere-like touch feeling, and can be used for close-fitting clothessuch as underwear fabrics.

Description

technical field [0001] The invention relates to the technical field of wool fiber refinement, in particular to an environment-friendly chlorine-free composite wool fiber and its preparation method and application. Background technique [0002] Wool fiber has irregular curls. The molecule of wool fiber is a peptide chain helical macromolecule composed of α-amino acids. The intermolecular and intramolecular structures are composed of disulfide bonds, salt bonds, and hydrogen bonds to keep the peptide chain in a stable space. configuration, and when subjected to specific conditions, the molecular shape can change from α-helix to β-sheet, weakening the α-helix to straighten and fix it, and achieve the purpose of elongation and thinning. [0003] The thickness of wool scales is generally 0.5-1 μm. In order to realize the thinning and functionalization of wool fibers, the wool fibers are thinned and elongated. Generally, the wool fibers in the wool top are processed by fiber pretr...

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Problems solved by technology

[0003] The thickness of wool scales is generally 0.5-1 μm. In order to realize the thinning and functionalization of wool fibers, the wool fibers are thinned and elongated. Generally, the wool fibers in the wool top are processed by fiber pretreatment, mechanical stretching, and chemical setting. Thinning, opening the chemical bonds between molecules, is easy to cause serious damage to the fiber, not only the fiber is easy to break during the thinning process, but also affects the mechanical and surface friction properties of the thinned wool fiber

At present, chlorination, oxidation, and protease methods are often used to reduce the fineness of wool scales, but excessive reduction can easily lead to a significant decrease in fiber strength, and the reagents used in the chlorination and oxidation methods are likely to cause yellowing and aging of wool fibers.

[0004] CN103361925A discloses a method for stretching thinning and permanent setting of uncolored wool, which sequentially undergoes carding, pretreatment, twisting, setting, untwisting, oxidation, washing and other processes to obtain permanently set stretching thinning wool , although the setting effect is good, but the pretreatment process is still in an acidic environment, using sodium pyrosulfite treatment, not only the damage to the wool fiber is relatively large, but also pollutes the environment; CN102888691A discloses a wool drawing preparation method. Process to obtain stretchable wool fiber aggregates, and then carry out drawing thinning and shaping to obtain drawn thinning wool: after pretreatment and before drawing thinning, the wool fiber aggregates are coated with colloid, and the colloid There is no chemical reaction with wool, and the colloid is washed away in a hot water bath after drawing and thinning; the pretreatment of the wool fiber is still treated with acidic sodium bisulfite, and the surface of the thinned wool fiber has a large number of defects. Not only the surface is rough, but also easy to break in the subsequent textile process

[0005] At present, the stretching and thinning of wool fiber, regardless of the chlorination method, oxidation method, or protease method, will destroy the interaction between the scale layer and the fiber, and the wool is easily damaged, resulting in a weak area. During the stretching process of the wool fiber, Fracture often occurs in the weaker part of the fiber, and at the same time, the process of peeling off the fiber scales produces a large amount of waste liquid, which seriously pollutes the environment

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