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A kind of preparation method of phase change fiber

A phase change fiber, mass fraction technology, applied in the directions of microsphere preparation, fiber chemical characteristics, chemical instruments and methods, etc., can solve the problems of large fiber diameter, poor softness and comfort, slow thermal response speed, etc. The effect of uniform layer thickness, good softness and fast comfort

Active Publication Date: 2021-01-26
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method solves the defect that general miniemulsions cannot prepare polymer shells with uniform thickness and high crosslinking degree
[0005] At present, the fiber fabric prepared by the microcapsule method has a certain heat-regulating performance although the coating amount exceeds 50wt%, but it is limited to the polymerization method, and the size of the prepared capsules is all in the micron or even millimeter order, which makes the fiber diameter too large. Slow thermal response, poor softness and comfort; and in miniemulsion polymerization and existing RAFT miniemulsion interfacial polymerization system, the coating amount is mostly lower than 50wt%

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • A kind of preparation method of phase change fiber
  • A kind of preparation method of phase change fiber
  • A kind of preparation method of phase change fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] The first step: with 0.05 parts by mass of (AA 8.69 -co-nBA 4.66 ) The random copolymer is dissolved in 70 parts by mass of deionized water, stirred and dissolved;

[0061] The second step: mix the AIBN of 0.1 mass parts, the n-octadecane of 13.4 mass parts, the styrene of 5.03 mass parts, the divinylbenzene of 2.09 mass parts, stir and dissolve;

[0062] Step 3: Mix the water phase and the oil phase, stir and pre-emulsify for 30 minutes to form a coarse emulsion. Treat with a shearing device for 30 minutes to obtain a fine emulsion;

[0063] Step 4: add 0.07 parts by mass of amphiphilic macromolecular RAFT emulsifier, pass in an inert gas for 30 minutes, heat up to 70°C, and react for 10 hours to obtain an aqueous dispersion of submicron phase change capsules;

[0064] Step 5: Put 1 mass part of polyvinyl alcohol in 5.67 mass parts of dispersion medium, raise the temperature to 90°C, and stir for 2 hours to obtain spinning stock solution;

[0065] Step 6: Mix 1.87 ...

Embodiment 2

[0069] The first step: 0.5 parts by mass of (AA 100 -co-nBA 100 ) The random copolymer is dissolved in 400 parts by mass of deionized water, stirred and dissolved;

[0070] The second step: mix the AIBN of 0.5 mass parts, the n-octadecane of 200 mass parts, the styrene of 80 mass parts, the divinylbenzene of 20 mass parts, stir and dissolve;

[0071] Step 3: Mix the water phase and the oil phase, stir and pre-emulsify for 30 minutes to form a coarse emulsion. Treat with a shearing device for 30 minutes to obtain a fine emulsion;

[0072] Step 4: Add 0.2 parts by mass of amphiphilic macromolecular RAFT emulsifier, pass in an inert gas for 5 minutes, heat up to 60° C., and react for 12 hours to obtain an aqueous dispersion of submicron phase-change capsules.

Embodiment 3

[0074] The first step: 0.01 parts by mass of (AA 5 -co-nBA 5 ) The random copolymer is dissolved in 40 parts by mass of deionized water, stirred and dissolved;

[0075] Step 2: Mix 0.01 parts by mass of AIBN, 5 parts by mass of n-octadecane, and 1 part by mass of styrene, stir and dissolve;

[0076] Step 3: Mix the water phase and the oil phase, stir and pre-emulsify for 5 minutes to form a coarse emulsion. Treat with a shearing device for 5 minutes to obtain a fine emulsion;

[0077] Step 4: add 0.01 parts by mass of amphiphilic macromolecular RAFT emulsifier, pass in an inert gas for 30 minutes, heat up to 95° C., and react for 6 hours to obtain an aqueous dispersion of submicron phase-change capsules.

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Abstract

The invention discloses a preparation method of a phase change fiber. The method utilizes RAFT miniemulsion interface polymerization to prepare a submicron phase change capsule aqueous dispersion, which is directly mixed with a spinning stock solution, and wet spinning is used to prepare a phase change fiber. Change fiber. In the water dispersion of submicron phase change capsules prepared by the present invention, the coating amount of the core material of the capsule exceeds 50wt%, the enthalpy value of the capsule exceeds 110J / g, and the particle size of the capsule is less than 1 micron, realizing high coating of the capsule Unity of volume and submicron size. The heat of crystallization and heat of fusion of phase change fibers can exceed 20J / g, which has excellent heat regulation performance; the diameter of a single fiber is less than 50 μm, which has good weavability and comfort. The direct blending of submicron phase change capsule water dispersion and spinning dope can significantly improve the dispersion degree of submicron phase change capsules in phase change fibers, and make the heat regulation performance of phase change fibers more stable. It has great potential in the field of smart fibers Huge application prospects.

Description

technical field [0001] The invention relates to the field of intelligent fibers, in particular to a preparation method of phase change fibers. Background technique [0002] Phase change fiber is a kind of heat storage and temperature regulating functional fiber developed by utilizing the property of phase change material to absorb or release heat to keep the temperature constant during the phase change process. The fiber fabric automatically adjusts the inner temperature of the fabric according to the ambient temperature. When the ambient temperature is low, the inner temperature of the fabric is automatically increased; [0003] Micro / nanocapsules are composite particles with a unique nanostructure, consisting of a shell wall material and a core material with a thickness of one to tens of nanometers. Phase change capsules are a type of micro / nanocapsules in which the core material is phase change materials. Phase change capsules can solve or alleviate the problems of easy ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/50D01F1/10B01J13/14C09K5/06
CPCB01J13/14C09K5/063D01F1/10D01F6/50
Inventor 罗英武赵玉海高翔
Owner ZHEJIANG UNIV
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