Preparation method of radiation refrigeration functional fabric

A functional fabric and radiant cooling technology, applied in fabrics, knitting, textiles, etc., can solve the problems of limited improvement effect and increased cost, and achieve the effect of reducing heat intake, improving reflectivity, and solving single function

Active Publication Date: 2021-12-21
南京宁智高新材料研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When designing materials with radiative cooling function, a common method is to add nanoparticles with high refractive index to the material to increase the reflection of visible light, but this will greatly increase the cost and the improvement effect is limited

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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  • Preparation method of radiation refrigeration functional fabric
  • Preparation method of radiation refrigeration functional fabric
  • Preparation method of radiation refrigeration functional fabric

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) Weigh 15g PAN and 10g PVDF, add 100mL DMF solvent, dissolve the polymer under heating at 80°C, then add 2.5g Al 2 o 3 , with an average size of 300nm, stirred until the solution is uniform and stable;

[0036] (2) Put the polymer into a 100mL syringe, choose a 20G needle; choose a water bath with a length of 1.5 meters, a depth of 25 centimeters, and a temperature of 10°C. Adjust the moving speed of the syringe pump and the rotating speed of the coil to control the uniformity of the yarn. After the yarn is dried at 85°C, it is wound into rolls to complete the wet spinning.

[0037] (3) Using commercially available cotton thread as the weft thread and the yarn obtained by wet spinning as the warp thread, a unidirectional moisture-wicking fabric is prepared by knitting.

[0038] figure 1 is a frontal picture of a fabric with radiative cooling, figure 2 is its opposite picture. The front side shows white facing the external environment, and the back side has the ...

Embodiment 2

[0043] (1) Weigh 2.5g PAN and 45g PVDF, add 500mL DMSO solvent, dissolve the polymer under heating at 90°C, then add 2.5g TiO 2 , with an average size of 200nm, stirred until the solution is uniform and stable;

[0044] (2) Put the polymer into a 100mL syringe, select a 24G needle; select a coagulation bath with a length of 5 meters, a solvent of ethanol, a depth of 25 cm, and a coagulation bath temperature of 20°C. Adjust the moving speed of the syringe pump and the rotating speed of the coil to control the uniformity of the yarn. After the yarn is dried at 85°C, it is wound into rolls to complete the wet spinning.

[0045] (3) Using commercially available cotton thread as the weft thread and the yarn obtained by wet spinning as the warp thread, a unidirectional moisture-wicking fabric is prepared by knitting.

[0046] Figure 10 is a cross-sectional view of the yarn, which has pores of micro-nano structure size inside.

[0047] Figure 11 is the visible-near-infrared reg...

Embodiment 3

[0049] (1) Weigh 0.5g polystyrene and 45g PA (polyamide), add 500mL DMF solvent, dissolve the polymer under heating at 80°C, then add 3.5g TiO 2 , with an average size of 300nm and stirred until the solution is uniform and stable;

[0050] (2) Put the polymer into a 100mL syringe, choose a 24G needle; choose a coagulation bath with a length of 0.5 meters, choose isopropanol as a solvent, and use a temperature of 30° C. and a depth of 25 centimeters. Adjust the moving speed of the syringe pump and the rotating speed of the coil to control the uniformity of the yarn. After the yarn is dried at 85°C, it is wound into rolls to complete the wet spinning.

[0051] (3) Using commercially available cotton thread as the weft thread and the yarn obtained by wet spinning as the warp thread, a unidirectional moisture-wicking fabric is prepared by knitting.

[0052] Figure 12 is a cross-sectional view of the yarn, which has pores of micro-nano structure size inside.

[0053] Figure 13 ...

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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Abstract

The invention discloses a preparation method of a radiation refrigeration functional fabric. The preparation method comprises the following steps that (1), two or more polymers with solubility difference are mixed and dissolved, heated and stirred until the solution has viscosity to obtain slurry; and (2), the slurry is prepared into yarns by using wet spinning, coagulating bath is carried out on the obtained yarns, then drying is carried out to prepare the fabric, and the radiation refrigeration functional fabric is obtained. The yarn forms a porous structure through the difference of the precipitation rates of two or more polymers in water, and the porous micro-nano structure can improve the reflectivity of sunlight and reduce heat intake, so that the radiation refrigeration effect is improved. Wet spinning is carried out on two or more polymers, the strength of the yarn is guaranteed, certain elasticity is guaranteed, and the defect that a single polymer is single in function is overcome; and the heat dissipation power of the fabric can be increased according to the characteristics of high absorption and high emission of the polymer material in the mid-infrared region, and the cooling effect is effectively achieved.

Description

technical field [0001] The invention relates to a preparation method of a functional fabric, in particular to a preparation method of a radiation cooling functional fabric. Background technique [0002] Heat and humidity comfort is one of the important indicators of fabrics, especially for summer clothing fabrics, heat and humidity comfort directly affects the sales and production of clothing. In outdoor scenes, especially when it is necessary to participate in outdoor labor or activities, how to effectively and continuously cool the human body is still an important problem to be solved. Clothes with radiant cooling fabrics can cool the human body in a green and low-carbon way, which can effectively avoid excessive energy waste, which is of great significance for achieving zero-energy outdoor continuous cooling. [0003] At present, adding cooling particles such as mica and jade to the fiber can significantly improve the thermal conductivity of the fiber, but the introducti...

Claims

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D03D15/292D03D15/283D03D15/44D03D15/50D04B1/16D04B21/00D01F1/10D01F8/08D01F8/10D01F8/12
CPCD03D15/292D03D15/283D03D15/44D03D15/50D04B1/16D04B21/00D01F8/08D01F8/10D01F1/106D01F8/12D10B2401/22D10B2401/10D10B2401/061D10B2401/063D10B2401/20
Inventor 朱嘉郑洪芝朱鹏臣余晓陈传露
Owner 南京宁智高新材料研究院有限公司
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