Functional composite fiber and preparation method thereof

Abstract

The invention discloses a functional composite fiber and a preparation method thereof. The functional composite fiber comprises 15wt%-45wt% of silicon dioxide and 0.5wt%-10wt% of chitosan quaternary ammonium salt. The preparation method comprises the following steps: (1) preparing an antiseptic solution from the chitosan quaternary ammonium salt, deionized water and sodium hydroxide; (2) preparing alkali cellulose from cellulose pulp, yellowing the alkali cellulose and dissolving the yellowed alkali cellulose in a sodium hydroxide solution of the silicon dioxide, wherein the solid content of spinning viscose containing silicon dioxide is 9.5wt%-11.5wt%; (3) adding the antiseptic solution into the viscose solution containing silicon dioxide in any step from yellowing to spinning to prepare a blended viscose solution, wherein the weight of the chitosan quaternary ammonium salt in the added antiseptic solution accounts for 0.5%-10% of that of the solid in the viscose solution; and (4) performing spinning forming and after-treating on the blended viscose solution to obtain the functional composite fiber. The functional composite fiber prepared by the method has both flame retardant and antibacterial properties.

Description

technical field [0001] The invention relates to functional cellulose fibers, in particular to a functional composite fiber with antibacterial and flame retardancy and its preparation technology. Background technique [0002] Flame-retardant cellulose fibers have incomparable excellent properties such as non-melting, moisture absorption and breathability, and are welcomed by the market and have good development prospects. Therefore, they have developed rapidly in recent years and the market scale has continued to expand. Market demand has given birth to the production and development of flame-retardant fibers, but most of the flame-retardant cellulose fibers currently on the market only have flame-retardant functions, and other composite functional products that are beneficial to human health rarely appear. With the continuous improvement of people's living standards, the functional requirements for products are also increasing. The single flame retardant function is the basi...

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Problems solved by technology

[0006] As regenerated cellulose fiber, viscose fiber has the characteristics of good moisture absorption and air permeability, and is comfortable to wear. In the prior art, based on the long and complicated production process of viscose fiber, in recent years, with various functional viscose With the advent of rubber fibers, various antibacterial viscose fibers have emerged as the times require, but cellulose fibers with both antibacterial and flame-retardant properties, especially antibacterial and flame-retardant cellulose fibers with chitosan as an antibacterial agent, are not There are still no relevant studies and reports

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