Preparation method for moisture-absorbing and heat-radiating polyacrylonitrile yarn

Abstract

The invention relates to a preparation method for moisture-absorbing and heat-radiating polyacrylonitrile yarn. The method comprises the following steps for preparing the yarn: (1) conducting hydrolytic treatment on acrylonitrile copolymer; (2) settling out through solvents, and adjusting pH value after filtration; (3) blending to obtain hydrolysis polyacrylonitrile stock solution; (4) adjusting temperature of the hydrolysis polyacrylonitrile stock solution, and blending the hydrolysis polyacrylonitrile stock solution with conventionally-prepared polyacrylonitrile stock solution evenly and sufficiently to obtain moisture-absorbing and heat-radiating polyacrylonitrile stock solution; (5) placing the stock solution on a polyacrylonitrile wet spinning production line to obtain moisture-absorbing and heat-radiating polyacrylonitrile fiber after the procedures of extrusion and solidification forming, pre-drafting, washing, hydrophilization processing, hot drafting, densifying-crosslinking, coiling and shaping, oiling, and drying; (6) cutting the fiber and spinning. The moisture-absorbing and heat-radiating polyacrylonitrile yarn prepared according to the method is good in moisture-absorbing and heat-radiating performance, good in uniformity and durability, high in production efficiency, and is not restricted by the number and the length of the fiber.

Description

technical field [0001] The invention relates to a functional yarn, in particular to a method for preparing a moisture-absorbing and heat-generating polyacrylonitrile yarn. Background technique [0002] The manufacture of yarn is to mix the fibers and spin them into yarns with uniform thickness, cleanness and certain physical properties. Fabrics for all kinds of clothing are obtained by weaving a yarn that is spun from fibers by a loom. [0003] Hygroscopic and heating fibers are active heat-generating thermal insulation materials. Since the hygroscopic and heating materials have the advantages of not expanding, not deforming and releasing a large amount of heat when absorbing moisture, they can better meet the function of keeping warm and protecting against cold. Hygroscopic and heating materials mainly use the polar hydrophilic groups in the fiber macromolecules to capture water molecules with high kinetic energy in the air. The hydrophilic groups and water molecules are c...

AI Technical Summary

Problems solved by technology

However, in the manufacture of polyacrylonitrile fibers, the addition of the second and third monomers is usually less than 15%. In order to meet the requirements for improving the mechanical properties and dyeing properties of the fibers, the addition of hydrophilic monomers is limited.

In addition, adding too much hydrophilic monomer will not only change the process of polymerization reaction and even spinning, but also involve a large range of process changes, and it is easy to change other original characteristics of the fiber.