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Preparation method of temperature-adjustable polyurethane composite phase change fiber

A composite phase change and polyurethane technology, applied in the direction of conjugated synthetic polymer artificial filaments, etc., can solve the problems of low fiber phase change enthalpy, low mechanical strength, poor washing resistance, etc., achieve good strength and elasticity, and excellent wearing effect , high strength and elastic effect

Pending Publication Date: 2022-06-03
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the phase-change temperature-regulating fiber prepared by the hollow fiber filling method has a large inner diameter, is difficult to end-cap, and is easy to ooze and wash out, so it has great limitations in use as a clothing fiber; the phase-change temperature-regulating fiber prepared by the coating method Hardening and poor washing resistance; microcapsules are evenly distributed in the phase change temperature-adjusting fiber prepared by microcapsule spinning, but adding microcapsules will reduce the spinnability of the spinning solution, and some phase change microcapsules will be lost, resulting in fiber phase change. The enthalpy change is small; the phase change temperature-regulating fiber produced by the composite spinning method has problems such as poor hand feeling and low mechanical strength

Method used

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  • Preparation method of temperature-adjustable polyurethane composite phase change fiber
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  • Preparation method of temperature-adjustable polyurethane composite phase change fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Example 1

[0023] A preparation method of a temperature-adjustable polyurethane phase change fiber, the specific steps are as follows:

[0024] (1) Dissolve polyethylene glycol and 2,4-toluene diisocyanate in toluene in a molar ratio of 1:2, and add catalyst dibutyltin dilaurate to the solution, and in N 2 Under the protection, react at 40°C for 8h to generate NCO-terminated prepolymer; then add N-phenyldiethanolamine in an equimolar amount with polyethylene glycol, heat up to 80°C and react for 10h to obtain a polyurethane phase change material; The mass ratio of dibutyltin dilaurate to polyethylene glycol is 1:80~150; the mass ratio of toluene to polyethylene glycol is 5~10:1;

[0025] (2) The polyurethane phase change material is mixed with polyethylene terephthalate in a certain proportion, and the blended pellets are put into the barrel of the melt spinning machine for 5 minutes, so that the material is fully melted, and then extruded at 50 m / min. The material i...

Embodiment 2

[0029] Example 2

[0030] A preparation method of a temperature-adjustable polyurethane composite phase change fiber, the specific steps are as follows:

[0031] (1) Dissolve polyethylene glycol and 2,4-toluene diisocyanate in toluene in a molar ratio of 1:2, and add catalyst dibutyltin dilaurate to the solution, and in N 2 Under the protection, react at 40°C for 8h to generate NCO-terminated prepolymer; then add N-phenyldiethanolamine in an equimolar amount with polyethylene glycol, heat up to 80°C and react for 10h to obtain a polyurethane phase change material; The mass ratio of described dibutyltin dilaurate and polyethylene glycol is 1: 80-150; the mass ratio of described toluene and polyethylene glycol is 5-10: 1;

[0032](2) The polyurethane phase change material and nylon 6 are mixed according to the mass ratio of 9:1, and the blended pellets are put into the barrel of the melt spinning machine with a barrel temperature of 150 ° C for 5 minutes, so that the material i...

Embodiment 3

[0034] Example 3

[0035] A preparation method of a temperature-adjustable polyurethane composite phase change fiber, the specific steps are as follows:

[0036] (1) Dissolve polyethylene glycol and 2,4-toluene diisocyanate in toluene in a molar ratio of 1:2, and add catalyst dibutyltin dilaurate to the solution, and in N 2 Under the protection, react at 40 °C for 8 hours to form a prepolymer; then add N-phenyldiethanolamine in an equimolar amount with polyethylene glycol, and heat up to 80 °C and react for 10 hours to obtain a polyurethane phase change material; wherein, the two The mass ratio of dibutyltin laurate and polyethylene glycol is 1: 80-150; the mass ratio of described toluene and polyethylene glycol is 5-10: 1;

[0037] (2) The polyurethane phase change material and polystyrene are mixed according to the mass ratio of 9:1, and the blended pellets are put into the barrel of the melt spinning machine with a barrel temperature of 145 ° C for 5 minutes, so that the m...

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Abstract

The invention relates to a temperature-adjustable polyurethane composite phase change fiber and a preparation method thereof, and belongs to the field of functional fiber materials. The temperature-adjustable polyurethane composite phase change fiber is obtained by blending a polyurethane phase change material and a high-strength polymer according to a certain proportion and then carrying out melt spinning, wherein the polyurethane phase change material is obtained by step-by-step polycondensation of polyethylene glycol, a diisocyanate organic compound and a chain extender N-phenyl diethanol amine; the introduction of the high-strength polymer enhances the breaking strength of the fiber. The phase change enthalpy value of the temperature-adjustable polyurethane composite phase change fiber reaches 107.66 J / g, the breaking strength reaches 1.48 cN / dtex, the elongation at break reaches 96.89%, and the temperature-adjustable polyurethane composite phase change fiber has an excellent temperature adjusting function and wearability and has a wide application prospect in the field of functional fibers.

Description

technical field [0001] The invention relates to a temperature-adjustable polyurethane composite phase change fiber and a preparation method thereof, belonging to the field of functional fiber materials. Background technique [0002] Traditional fabrics mainly change the raw material or organizational structure of the fabric, thereby affecting the exchange degree of heat generated by the human body and the external environment, so as to achieve the purpose of keeping the human body comfortable and warm. However, traditional fabrics can only keep warm in one direction, and the thermal insulation effect is greatly affected by the environment. The scope of application is narrow. With the development of science and technology and the improvement of people's living standards, the function of traditional fabrics for unidirectional warmth has gradually been unable to meet people's needs for fabric functionality. Therefore, the development of phase-change temperature-regulating fibe...

Claims

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Application Information

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IPC IPC(8): D01F8/16C08G18/10C08G18/48C08G18/66C08G18/32
CPCD01F8/16C08G18/10C08G18/6688C08G18/4833C08G18/3275
Inventor 王文涛耿伟纬姚玉元
Owner ZHEJIANG SCI-TECH UNIV
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