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Method for enhancing thermal conductivity of phase-change energy-storage superfine composite polyamide fiber and method for producing phase-change energy-storage superfine composite polyamide fiber

A technology of nylon fiber and reinforced phase, which is applied in the field of phase change energy storage ultrafine composite nylon fiber membrane, can solve the problems of composite uniformity and heat transfer effect, increase the total weight of the system, and low overall efficiency, and achieve thermal cycle Good stability, simple and easy-to-control preparation process, and the effect of expanding the applicable field

Inactive Publication Date: 2012-06-27
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the fin structure and the addition of metal particles will greatly improve the heat transfer efficiency, it also significantly increases the total weight of the system, and the uneven distribution is likely to cause unstable heat transfer, and the overall efficiency is low, so the development prospects are limited; expanded graphite mainly Mixed with high polymers, it is mostly used for performance improvement in medium and high temperature fields, but its composite uniformity and heat transfer effect are still not significant enough

Method used

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  • Method for enhancing thermal conductivity of phase-change energy-storage superfine composite polyamide fiber and method for producing phase-change energy-storage superfine composite polyamide fiber
  • Method for enhancing thermal conductivity of phase-change energy-storage superfine composite polyamide fiber and method for producing phase-change energy-storage superfine composite polyamide fiber
  • Method for enhancing thermal conductivity of phase-change energy-storage superfine composite polyamide fiber and method for producing phase-change energy-storage superfine composite polyamide fiber

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Experimental program
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Effect test

Embodiment 1

[0022] Add 0.2g of carbon nanofibers (CNFs) into a 50ml round bottom flask filled with 20g of concentrated nitric acid solution, stir magnetically for 2 hours, and oscillate ultrasonically for 30 minutes to make the CNFs evenly dispersed, heat and reflux for 2 hours, cool naturally to room temperature, add distilled water to dilute and, washing, filtering, and then placed in a vacuum oven at 80°C, dried for 12 hours, and ground to obtain modified CNFs powder. Weigh 1g of polyamide 6 (PA6) slices and dissolve them in a 50ml Erlenmeyer flask containing 11.5g of hexafluoroisopropanol (HFIP), and stir at a constant speed for 10h at room temperature to obtain a homogeneous solution A (8wt% PA6 solution). Then add 1 g of lauric acid (LA) to dissolve in the above solution A, and magnetically stir until LA is completely dissolved to obtain a uniform mixed solution B (mass ratio: LA / PA6=100 / 100). Finally, 0.020g, 0.062g and 0.105g of modified CNFs were weighed, respectively added to 3 ...

Embodiment 2

[0025]Add 0.2g of carbon nanotubes (CNTs) into a 50ml round-bottomed flask filled with 20g of concentrated sulfuric acid solution, stir magnetically for 3 hours, and oscillate ultrasonically for 1 hour to make the CNTs evenly dispersed, heat and reflux for 3 hours, cool naturally to room temperature, and add distilled water to dilute and, washing, filtering, and then placed in a vacuum oven at 90° C., dried for 10 hours, and ground to obtain modified CNTs powder. Weigh 1g of PA6 slices and dissolve them in a 50ml Erlenmeyer flask filled with 11.5g of hexafluoroisopropanol (HFIP), and stir at a constant speed for 10h at room temperature to obtain a homogeneous solution A (8wt% PA6 solution). Then add 1 g of LA to dissolve in the above solution A, and magnetically stir until the LA is completely dissolved to obtain a uniform mixed solution B (mass ratio: LA / PA6=100 / 100). Finally, 0.020g, 0.062g, 0.105g and 0.222g of modified CNTs were weighed, added to 4 parts of solution B resp...

Embodiment 3

[0028] Add 0.2g CNFs into a 50ml round bottom flask containing 20g concentrated nitric acid solution, stir magnetically for 2 hours, and oscillate ultrasonically for 30 minutes to make the CNFs evenly dispersed, heat and reflux for 2 hours, cool to room temperature naturally, add distilled water to dilute, neutralize, wash and filter , then placed in a vacuum oven at 80°C, dried for 12 hours, and ground to obtain modified CNFs powder. Weigh 1g of PA6 slices and dissolve them in a 50ml Erlenmeyer flask filled with 9g of HFIP, and stir at a constant speed for 10h at room temperature to obtain a homogeneous solution A (10wt% PA6 solution). Then add 1.5 g of myristic acid (MA) to dissolve in the above solution A, and magnetically stir until MA is completely dissolved to obtain a uniform mixed solution B (mass ratio: MA / PA6=150 / 100). Finally, 0.025g, 0.077g and 0.132g of modified CNFs were weighed, respectively added to 3 parts of solution B, stirred at room temperature for 2 hours...

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Abstract

A production method for enhancing thermal conductivity of a fatty acid / polyamide-6 nano composite phase-change material belongs to the technical fields of nanocomposites, phase change materials, electrostatic spinning and the like, and particularly relates to a method of using an electrostatic spinning device to produce a nano composite fiber membrane of fatty acid / pollyamide-6 / carbon nano fibers. The production method is simple in process and easy in control. By effectively combining the production method with the electrostatic spinning technique, the produced fiber is small in diameter and uniform in distribution, the produced nano composite phase change material is uniform, stable and less prone to leakage, and has the thermal conductivity more evident than that of the conventional phase change material. Therefore, the material is more convenient in processing and application, and more widely applicable.

Description

technical field [0001] The invention belongs to the technical fields of nanocomposite, phase change energy storage and electrospinning, and specifically relates to a phase change energy storage ultrafine compound with high thermal conductivity prepared by adding chemically modified nanoparticles and using an electrospinning device. The method of nylon fiber membrane. Background technique [0002] Phase change materials are widely used in solar energy utilization, power load regulation, building energy saving, heat energy recovery, aerospace and other aspects due to their advantages of high heat storage density, small equipment size, high thermal efficiency, and heat absorption and release as constant temperature process. However, due to the low thermal conductivity of most phase change materials, the thermal conductivity of general organic phase change materials is usually between 0.15 and 0.3 W / (m·K), which limits the absorption of energy storage systems using phase change ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/4334D04H1/728D01D1/02D01D5/00D01D5/40D01F1/10D01F6/90
Inventor 蔡以兵徐筱琳魏取福徐阳
Owner JIANGNAN UNIV
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