Phase change composite spinning solution and its preparation and application

A technology of composite spinning and phase change, which is applied in the field of phase change composite spinning stock solution and its preparation and application, to achieve the effects of excellent barrier property, strong adsorption force, high specific surface area and surface area to volume ratio

Inactive Publication Date: 2004-05-05
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is generally used to spin ultrafine fibers and ultrafine fiber mats such as PEO, PAN, PBI, etc., but the application of

Method used

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  • Phase change composite spinning solution and its preparation and application
  • Phase change composite spinning solution and its preparation and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Preparation of phase change composite spinning dope:

[0030] The phase change material is PEG with different molecular weights, and the solvent is DMSO, acetone or acetic acid; the fiber-forming polymer material is cellulose and its derivatives, including microcrystalline cellulose, wood pulp, cellulose diacetate, triacetic acid Cellulose, the solvent is DMSO, acetone or acetic acid; the weight ratio of phase change substance and fiber-forming high polymer is 30-50:70-50, and the concentration of spinning dope is 10-15wt%.

[0031] Application of phase change composite spinning solution:

[0032] The heat preservation temperature of the pump body of the metering pump 1 is 20-45°C; the capillary aperture of the spinneret die 2 is 0.2-0.3mm, the air at 20-50°C is used as the medium in the spinning process, and the air velocity is 0-1m / min, The electrostatic field voltage is 10~60kv; the average diameter of the prepared fibers is 20~200nm, the phase transition temperatur...

Embodiment 2

[0034] Preparation of phase change composite spinning dope:

[0035] The phase-change substance is PEG with different molecular weights, and the solvent is acetic acid; the fiber-forming high polymer material is chitin, and the solvent is acetic acid; the weight ratio of the phase-change substance and the fiber-forming polymer is 20-50:80-50, The concentration of the spinning dope is 2-10 wt%.

[0036] Application of phase change composite spinning solution:

[0037] The heat preservation temperature of the pump body of the metering pump 1 is 20-45°C; the capillary aperture of the spinneret die 2 is 0.2-0.3mm, the air at 20-50°C is used as the medium in the spinning process, and the air velocity is 0-1m / min, The electrostatic field voltage is 10~60kv; the average diameter of the prepared fibers is 20~200nm, the phase transition temperature of the fibers and the fiber mat is 40~45℃ when heating up, the phase transition temperature is 26~22℃ when cooling down, and the phase tra...

Embodiment 3

[0039] Preparation of phase change composite spinning dope:

[0040] The phase change material is PMA or PA, the solvent is a mixture of DMF and acetone, and the blending weight ratio of DMF and acetone is 2:98 to 98:2; the fiber-forming high polymer material is polyacrylonitrile, and the solvent is a mixture of DMF and acetone. In the mixture, the blending weight ratio of DMF and acetone is 2:98-98:2; the weight ratio of phase change substance and fiber-forming high polymer is 50-70:50-30, and the concentration of spinning dope is 8-15wt%.

[0041] Application of phase change composite spinning solution:

[0042] The heat preservation temperature of the pump body of the metering pump 1 is 50-90°C; the capillary aperture of the spinneret die 2 is 0.3-0.8mm, the air at 50-100°C is used as the medium in the spinning process, and the air velocity is 0-1m / min, The electrostatic field voltage is 10-60kv; the average diameter of the prepared fibers is 100-600nm, the phase transitio...

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Abstract

A composite phase-change spinning dope contains soluet and solvent. Said solute is composed of the phase change material chosen from polyol, polyolefin, polyether and paraffin wax hydrocarbon, and the fibre-forming high polymer chosen from cellulose and its delivatives, chitin and its derivatives, polyacrylonitrile, and polyvinyl alcohol. Said solvent is the mixture of DMSO, keton, organic, distilled water or DMF and acetone. It can be used to prepare the superfine phase-change fibres by electrostatic spinning. Said superfine phase-change fibres can be used to prepare multifunctional protecting clothes.

Description

technical field [0001] The invention relates to a phase-change composite spinning dope, preparation and application thereof, and belongs to the technical field of spinning dope preparation and application. Background technique [0002] Using the endothermic and exothermic phenomena of certain substances in the phase transition process, thermal energy storage and temperature regulation control can be carried out. The use of these low-temperature thermal energy storage phase-change materials to prepare temperature-friendly fibers and textiles began in the 1980s. Since the mid-1980s, Vigo et al. have studied the immersion of hollow fibers in a solution or melt of polyethylene glycol (PEG) or plastic crystalline materials, so that polyethylene glycol or plastic crystals can enter the interior of the fibers to obtain Fibers with phase change properties at temperatures of 40-60°C. The inner diameter of this fiber is large, and the phase change material rema...

Claims

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Application Information

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IPC IPC(8): D01D1/02
Inventor 陈彦模朱美芳张瑜许文菊左伟伟
Owner DONGHUA UNIV
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