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

A phase change microcapsule, polyurethane elasticity technology, applied in the chemical characteristics of fibers, rayon manufacturing, single-component synthetic polymer rayon, etc., can solve the problems of poor heat storage function, limited thermal insulation capacity, poor efficiency, etc. The effect of excellent thermal insulation

Active Publication Date: 2015-06-24
ZHEJIANG HUAFENG SPANDEX
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 st

Method used

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

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[0022] Preparation of phase-change microcapsules: Add a certain amount of distilled water, dispersant and other additives into the reaction kettle and stir to obtain a uniform water phase. Then a certain amount of acrylonitrile, styrene, methacrylic acid, C12-14 alcohol, and AIBN were mixed and added to the above water phase as an oil phase, homogenized at a speed of 1200 rpm for 30 minutes, purged with nitrogen, and the stirring speed was reduced to 300 rpm. Reaction at 60°C for 8h. After the reaction is complete, the product is processed, and the synthesized phase-change microcapsule suspension is vacuum-filtered, washed repeatedly with distilled water for 3 times, and vacuum-dried at 50° C. to obtain phase-change microcapsule A as a white dry powder.

[0023] Using the same method, the above-mentioned phase change material C12-14 alcohol is replaced by paraffin to prepare phase change microcapsule B.

[0024] The enthalpy of phase change microcapsule A is 124 J / g, the core...

Embodiment 1

[0027] Add 6.3kg of solvent dimethylacetamide (DMAC) to the reactor (RA1), start stirring, then add 9.50kg of polytetrahydrofuran ether glycol and 2.31kg of diphenylmethane diisocyanate to RA1, and react at 45°C for 2 hours The prepolymer PPS is obtained, and the PPS is transferred into the chain extension reactor (RA2). Add 13.0kg of cleaned DMAC to RA1, transfer the cleaned DMAC into RA2, start stirring, and when the temperature of RA2 cools down to about 10°C, add dropwise the mixed amine solution containing 0.174kg of ethylenediamine and 0.04kg of diethylamine into RA2 Carry out chain extension reaction and chain termination reaction, wherein the mass concentration of the mixed amine solution is 5.45%. After the reaction is complete, the resulting polymer is transferred into D-FETK. Add 120g phase-change microcapsule A in D-FETK, 18.1g anti-yellowing agent UDT, 36.2g anti-ultraviolet agent UTP, antioxidant CY24.1g, lubricating relieve agent magnesium stearate solution MGS...

Embodiment 2

[0029] Add 360g phase-change microcapsule A in D-FETK tank, other steps are identical with embodiment 1.

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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. ...

Claims

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Application Information

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IPC IPC(8): D01F6/94D01F1/10C08F220/46C08F212/10C08F2/18C08G18/76C08G18/66C08G18/48C08G18/32
Inventor 周志伟刘亚辉陈铃毛植森席青
Owner ZHEJIANG HUAFENG SPANDEX
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