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High-thermal-conductivity radiation refrigeration fiber, preparation method thereof and fabric

A technology of radiative cooling and high thermal conductivity, applied in the direction of braided fabrics, fiber treatment, fiber chemical characteristics, etc., can solve the problems of blocking the heat dissipation of the skin, limiting the cooling effect of fabrics, and difficulty in large-scale production, so as to enhance the effect of radiative cooling, Improve heat conduction and heat dissipation capabilities, improve the effect of reflectivity

Inactive Publication Date: 2021-03-09
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in order to achieve high infrared emissivity or high transmittance, the above-mentioned radiation cooling fibers usually use high polymer materials as the base material of the fibers, and the thermal conductivity of the polymer materials themselves is extremely low, which also completely blocks the heat conduction of the skin through the clothing. This important way of heat dissipation limits the cooling effect of the fabric; in addition, the manufacturing process of the current high thermal conductivity fiber material is relatively complicated, and it is difficult to produce on a large scale

Method used

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  • High-thermal-conductivity radiation refrigeration fiber, preparation method thereof and fabric

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Effect test

Embodiment 1

[0043] The polymer base material is PVDF, the high thermal conductivity micro-nano particles are aluminum nitride, and the particle radius is 0.3±0.03 μm. Due to the high thermal conductivity requirements, the volume fraction of high thermal conductivity particles is selected to be at most 50%, and the high thermal conductivity radiation cooling fiber is obtained, and The thickness of the fabric made of fibers was 80 μm.

[0044] Preparation process:

[0045] (1) Composite material preparation: Add 270g of PVDF particles into a pulverizer to pulverize them into powder and uniformly mix with 730g of aluminum nitride particles, pour the mixed powder into a twin-screw extruder, set the temperature at 290°C, and polymerize at high temperature The molten material is uniformly mixed with the heat-conducting particles, and the set pressure is 4.5MPa. The mixed melt is extruded and solidified in a water bath to form a casting belt, which is led to a pelletizer to cut to form a composi...

Embodiment 2

[0051] The polymer base material is PVDF, the high thermal conductivity micro-nano particles are aluminum nitride, and the particle radius is 0.3±0.03 μm. Due to the high thermal conductivity requirements, the volume fraction of high thermal conductivity particles is selected to be at most 50%, and the high thermal conductivity radiation cooling fiber is obtained, and The thickness of the fabric made of fibers was 150 μm.

[0052] Preparation process:

[0053] (1) Composite material preparation: Add 270g of PVDF particles into a pulverizer and pulverize them into powder and mix them evenly with 730g of aluminum nitride particles, pour the mixed powder into a twin-screw extruder, set the temperature at 270°C, and polymerize at high temperature The molten material is uniformly mixed with the heat-conducting particles, and the set pressure is 4.5MPa. The mixed melt is extruded and solidified in a water bath to form a casting belt, which is led to a pelletizer to cut to form a com...

Embodiment 3

[0059] The polymer base material is PVDF, the high thermal conductivity micro-nano particles are aluminum nitride, and the particle radius is 0.3±0.03 μm. Due to the high thermal conductivity requirements, the volume fraction of high thermal conductivity particles is selected to be at most 50%, and the high thermal conductivity radiation cooling fiber is obtained, and The thickness of the fabric made of fibers was 300 μm.

[0060] Preparation process:

[0061] (1) Composite material preparation: Add 270g of PVDF particles into a pulverizer and pulverize them into powder and mix them evenly with 730g of aluminum nitride particles, pour the mixed powder into a twin-screw extruder, set the temperature at 270°C, and polymerize at high temperature The molten material is uniformly mixed with the heat-conducting particles, and the set pressure is 4.5MPa. The mixed melt is extruded and solidified in a water bath to form a casting belt, which is led to a pelletizer to cut to form a com...

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Abstract

The invention belongs to the field of radiation refrigeration materials, and particularly discloses high-thermal-conductivity radiation refrigeration fiber, a preparation method thereof and fabric. The radiation refrigeration fiber comprises a polymer substrate and thermal-conductive micro-nano particles, wherein the thermal-conductive micro-nano particles are uniformly distributed in the polymersubstrate, and the particle size of the thermal-conductive micro-nano particles is 0.1 [mu]m-5 [mu]m; and the high-thermal-conductivity radiation refrigeration fiber is suitable for preparing radiation refrigeration fabric worn by a human body. The micro-nano particles are doped in a polymer, so that the thermal conductivity of composite fiber can be effectively improved, the micro-nano high-thermal-conductivity particles have good reflection characteristics in a solar band, and the radiation refrigeration performance of the fiber is also enhanced; and the radiation refrigeration fiber has excellent heat-conducting property, radiation refrigeration property and mechanical property, and is simple and convenient in preparation method and easy for industrial production.

Description

technical field [0001] The invention belongs to the field of radiation refrigeration materials, and more specifically relates to a radiation refrigeration fiber with high thermal conductivity, a preparation method and a fabric thereof. Background technique [0002] With the rapid development of the world economy and the continuous improvement of people's pursuit of human thermal comfort, air conditioners have become one of the indispensable electrical appliances in family homes and commercial buildings. With the popularization of air conditioners and the improvement of power levels, their energy consumption ratio is also soaring. Faced with the high energy consumption of space cooling, people began to seek a more economical and environmentally friendly cooling method to achieve zero energy. consumption of personal thermal management. [0003] Radiation cooling is a passive cooling method, which combines the radiation cooling function with human wearable fabrics, which can e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F1/10D01F6/12D01D5/088D04C1/02
CPCD01D5/088D01F1/106D01F6/12D04C1/02
Inventor 胡润刘一达罗小兵
Owner HUAZHONG UNIV OF SCI & TECH
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