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Heat-storage temperature-adjustment fiber and preparation method thereof

A technology for heat storage and temperature regulation, and fiber, which is applied in fiber processing, conjugated synthetic polymer rayon, and filament/thread forming. It can solve problems such as reducing application value and achieve good interface compatibility and operation methods. Simple, guaranteed continuity of effect

Active Publication Date: 2018-07-10
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the phase change enthalpy of the prepared energy storage temperature-regulating fiber is only 5-15J / g, which greatly reduces its application value

Method used

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  • Heat-storage temperature-adjustment fiber and preparation method thereof
  • Heat-storage temperature-adjustment fiber and preparation method thereof
  • Heat-storage temperature-adjustment fiber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Poly(ethylene-g-maleic anhydride)-g-n-octadecyl alcohol with a grafting degree of 50% was used as a comb-shaped polymer phase change material, and PET (intrinsic viscosity number 0.56) with a melting temperature of 250°C was used as a synthetic material. Fiber polymer, after the two components are dried until the moisture content is lower than 50ppm, the contents of the comb-shaped polymer phase change material and the fiber-forming polymer are controlled to be 40wt.% and 60wt.%, respectively, and melt-extruded at 280°C After passing through a filter screen and an annular spinneret, fine spinning streams are obtained, cooled and dried in an air bath at 25°C, and then wound at a winding speed of 800m / min to obtain primary fibers. Then after double drafting, setting and drying, it is processed into long fibers, and short fibers are obtained after cutting.

[0036]The fineness of the short fiber is 2.1dtex, the tensile breaking strength is 3.2cN / dtex, and the elongation at...

Embodiment 2

[0038] Graft copolymer of poly(ethylene-g-maleic anhydride)-g-octadecyl alcohol and poly(ethylene-g-maleic anhydride)-g-hexadecanol at a molar ratio of 50:50 (the degree of grafting is 45%) as the comb polymer phase change material, its structural formula is as follows:

[0039]

[0040] Using polylactic acid (intrinsic viscosity 0.62) as the fiber-forming polymer, after the two components are dried until the moisture content is lower than 90ppm, the contents of the comb-like polymer phase change material and the fiber-forming polymer are controlled to be 50wt.% and 50wt.%, were melted and extruded at 190°C respectively, passed through a filter screen and a C-shaped spinneret to obtain fine spinning streams, cooled and dried in an air bath at 25°C, and wound at a winding speed of 800m / min. The raw fibers are obtained, and then processed into long fibers after double drafting, heat setting and drying.

[0041] After inspection, the fineness of the long fiber is 90dtex / 48f, ...

Embodiment 3

[0043] Poly(ethylene-g-maleic anhydride)-g-n-hexacosanol with a grafting degree of 48% is used as a comb-shaped polymer phase change material, and polycaprolactam (intrinsic viscosity number 0.65) is used as a fiber-forming polymer. After the two components are dried until the moisture content is lower than 50ppm, the contents of the comb-like polymer phase change material and the fiber-forming polymer are controlled to be 50wt.% and 50wt.%, respectively, melted and extruded at 240°C, and filtered net, annular spinneret, to obtain fine spinning streams, after cooling and drying in an air bath at 25°C, and winding at a winding speed of 800m / min to obtain primary fibers. Then after double drafting, setting and drying, it is processed into long fibers, and short fibers are obtained after cutting.

[0044] The denier of the short fiber is 3.0dtex, the tensile breaking strength is 3.5cN / dtex, and the elongation at break is 28%. / g; 5% thermal weight loss temperature is 255°C; afte...

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Abstract

The invention discloses heat-storage temperature-adjustment fiber and a preparation method thereof. According to the invention, fiber is taken as a sheath core structure, a sheath layer is a fiber-forming polymer, and a core layer is a comb high-molecular phase-transition material; the comb high-molecular phase-transition material is poly(ethylene-g-maleic anhydride)-g-alphanol; and according to the mass percentage, the mass of the comb high-molecular phase-transition material accounts for 30-70% of that of the heat-storage temperature-adjustment fiber. The preparation method comprises the following steps: 1) performing respective fusion extrusion on dried raw materials, passing the materials through a filter screen and a shaped spinneret plate to obtain spinning trickle flow; 2) performing air bath cooling and drying on the spinning trickle flow at the temperature of 0-40 DEG C, and reeling the material at the speed of 500-3500 m / min for forming fiber, or directly collecting the material without reeling to obtain nascent fiber; and 3) after post-treatment, obtaining the heat-storage temperature-adjustment fibers with different forms. The phase-transition heat-storage value of theheat-storage temperature-adjustment fiber is 43-102 J / g, no supercooling crystallization and liquid external migration phenomena is generated, after extracting tests, the mass loss late of the phase transition material does not exceed 5%.

Description

technical field [0001] The invention relates to the field of functional fibers, in particular to a heat storage and temperature regulating fiber and a preparation method thereof. Background technique [0002] Heat storage and temperature regulating fiber is a kind of fiber with heat storage and heat release function made by wrapping phase change material inside the fiber or coating on the fiber surface, in which the phase change material acts as a functional substance for heat storage and temperature regulation role. At present, there are mainly two types of phase change materials used for the development of heat storage and temperature regulation fibers: ① linear phase change materials, such as polyether, PEG base, long-chain alkanes, alkanols or alkanoic acids, etc., but due to the Phase change materials are prone to problems such as heat loss, liquid migration and poor compatibility during melt processing, which greatly limits their application in the field of fiber manu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F8/14D01F8/12D01F8/06D01F8/10D01D5/34
CPCD01D5/34D01F8/06D01F8/10D01F8/12D01F8/14
Inventor 石海峰李树芹王海霞许红星钱彭华
Owner TIANJIN POLYTECHNIC UNIV
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