Heat accumulation and preservation polyurethane elastic fibers containing phase change microcapsules and preparation method of heat accumulation and preservation polyurethane elastic fibers

Abstract

The invention relates to heat accumulation and preservation polyurethane elastic fibers containing phase change microcapsules and a preparation method of the heat accumulation and preservation polyurethane elastic fibers. According to the heat accumulation and preservation fibers, the heat accumulation and preservation performance of polyurethane fibers can be improved by adding 0.5-5wt% of the phase change microcapsules into polyurethane elastic fibers. The preparation method specifically comprises the following steps: (1) preparing the phase change microcapsules with nuclear shell structures by adopting a suspension polymerization method; (2) performing condensation and polymerization by taking polyether diol and diisocyanate as synthetic monomers to form prepolymer, dissolving the prepolymer by adding a solvent, and adding mixed amine to perform chain extension reaction and chain termination reaction on the prepolymer to obtain a polyurethane urea solution; and (3) adding the prepared phase change microcapsules together with other auxiliary agents into the polyurethane urea solution, performing mixed curing, and treating a spinning stock solution subjected to curing by virtue of a dry spinning technology to prepare the heat accumulation and preservation polyurethane elastic fibers. The polyurethane elastic fibers prepared by the method provided by the invention contain a certain proportion of a phase change material, the fibers prepared by the method provided by the invention or textiles of the fibers have excellent heat accumulation and preservation performances.

Description

technical field [0001] The invention relates to a preparation method of heat-storing and heat-preserving polyurethane elastic fibers containing phase change microcapsules, which belongs to the field of production of polymer materials. The polyurethane elastic fiber prepared by the invention has excellent heat storage and heat preservation performance. Background technique [0002] Spandex is a special chemical fiber with high elasticity. It has many advantages such as light specific gravity, high breaking strength, high elongation at break and good elastic recovery at room temperature. It is widely used in high-end underwear, leisure sportswear, socks, decorative cloth and medical fabrics. bandages etc. As the use and application of spandex become wider and wider, the requirements for its differentiated performance are also getting higher and higher. Heat storage and heat preservation spandex is an invention that conforms to the development trend of differentiated spandex. ...

AI Technical Summary

Problems solved by technology

[0004] British patent GB2303375A discloses that zirconia, zirconium silicate, silicon dioxide, titanium dioxide and other ceramic powders with far-infrared radiation are integrated into synthetic fibers, and the ceramic powder absorbs the heat of the human body to emit far-infrared rays and then absorbed by the human body to improve the heat preservation effect. However, these ceramic powders have poor efficiency in absorbing solar energy, cannot convert solar energy into far-infrared rays that are easily absorbed by the human body, and have poor heat storage performance; Japanese Patent Laying-Open No. 1-132816 discloses the use of silicon carbide and other inorganic particles that absorb solar energy better. However, silicon carbide is black and can only produce black fibers; Chinese patents CN201120304037 and CN200710024307 disclose the use of special spinnerets to manufacture fibers with a hollow structure, and prevent heat from "escaping" through the static air in the fibers, but hollow fibers It cannot absorb external energy, and has limited thermal insulation capacity, which has great limitations

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