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Preparation method of phase change nanofiber

A nanofiber and phase change technology, applied in fiber processing, fiber type, chemical instruments and methods, etc., can solve the problems of high melting point and unstable structure of phase change materials, achieve large specific surface area, stable structure, and improve overall cost performance Effect

Active Publication Date: 2020-04-14
WUHAN TEXTILE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The advantage of this method is that inorganic powder is used as the carrier, the phase change material prepared has a relatively high melting point, and no plasticizer is needed. The disadvantage is that the phase change medium and the carrier are directly physically adsorbed, and the structure is unstable.

Method used

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  • Preparation method of phase change nanofiber
  • Preparation method of phase change nanofiber
  • Preparation method of phase change nanofiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Disperse PVA-co-PE nanofibers into a mixed solution of isopropanol and water with a mass ratio of 1:1, and break them into a suspension at a high speed. The mass percentage of PVA-co-PE nanofibers in the suspension is 3%; add acetone to the suspension and perform centrifugal washing; control the centrifugal speed of the centrifuge to be 8000r / min, control the temperature to be 5°C, and centrifuge for 5 minutes during centrifugation and sedimentation; the obtained solid is dispersed in acetone to obtain a mixture , and then transfer the mixture to a three-necked flask, which is placed in a constant temperature water bath, a condenser tube and a stirrer are also installed on the three-necked flask, the temperature of the water bath is controlled to be 70°C, stirred for 30min, and then 5g of phase Change the material PEG-6000, add it into the three-necked flask, control the stirring speed to 600r / min, stir for 0.5h to make it evenly mixed, then slowly add 5g of cross-linkin...

Embodiment 2

[0039]Disperse PVA-co-PE nanofibers into a mixed solution of isopropanol and water with a mass ratio of 1:1, and break them into a suspension at a high speed. The mass percentage of PVA-co-PE nanofibers in the suspension is 5%; add acetone to the suspension and perform centrifugal washing; control the centrifugal speed of the centrifuge to 10,000r / min, control the temperature to 5°C, and centrifuge for 8 minutes during centrifugation and sediment separation, and disperse the obtained solid into acetone to obtain a mixture , and then transfer the mixture to a three-necked flask, the three-necked flask is placed in a constant temperature water bath, a condenser tube and a stirrer are also installed on the three-necked flask, the temperature of the water bath is controlled to be 70 ° C, stirred for 10 min, and then weighed 5g phase Change the material PEG-10000, add it into the three-necked flask, control the stirring speed to 1000r / min, stir for 0.5h to make it evenly mixed, then...

Embodiment 3

[0042] Disperse PVA-co-PE nanofibers into a mixed solution of isopropanol and water with a mass ratio of 1:1, and break them into a suspension at a high speed. The mass percentage of PVA-co-PE nanofibers in the suspension is 4%; add acetone to the suspension and carry out centrifugal washing; control the centrifugal speed of the centrifuge to 9000r / min, control the temperature to 5°C, and centrifuge for 5 minutes during centrifugation and sedimentation, and disperse the obtained solid into acetone to obtain a mixture , and then the mixture was transferred to a three-necked flask, which was placed in a constant temperature water bath, a condenser tube and a stirrer were installed on the three-necked flask, the temperature of the water bath was controlled to be 70°C, stirred for 30min, and then 5g of the phase was weighed Change the material to PEG-2000, add it into the three-necked flask, control the stirring speed to 5000r / min, stir for 0.5h to make it evenly mixed, then slowly...

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Abstract

The invention discloses a preparation method of a phase change nano fiber and belongs to the technical field of functional materials. The preparation method comprises the steps of 1) pretreating a nano fiber; 2) allowing full reaction; 3) post-treating a rough product. According to the preparation method, activity of hydroxyl groups on PEG (polyethylene glycol) and PVA-co-PE (poly (vinylalcohol-co-ethylene)) is utilized to graft a phase change material to the PVA-co-PE nano fiber by means of condensation polymerization; the prepared phase change nano fiber has crosslinked network structure; the structure of the phase change nano fiber has good stability and slim chances for deformation even in phase change process; accordingly, no leakage or pollution is caused.

Description

technical field [0001] The invention relates to phase change materials, belongs to the technical field of functional materials, and in particular relates to a preparation method of phase change nanofibers. Background technique [0002] Phase change materials have the potential to absorb or release a large amount of heat during the phase change process. Phase change temperature-regulating fibers, also known as heat-storage and temperature-regulating fibers, are a kind of thermal-storage and temperature-regulating fibers prepared by doping phase-change temperature-regulating materials into fibers. The fiber with temperature function, the heat storage and temperature regulating fiber can use the phase change process of the phase change material to exchange heat with the external environment when the temperature of the external environment changes, and realize the temperature regulation function of the fiber. Turning into a liquid can lower the temperature, and when encountering...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M15/53D06M13/395D06M13/192D06M13/148C09K5/06D06M101/24D06M101/20
Inventor 王栋牛应买赵青华梅涛毛秦岑罗宇郭启浩
Owner WUHAN TEXTILE UNIV