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A kind of heat-resistant, degradable radiation refrigeration film and its preparation method and application

A radiation cooling and heat-resistant technology, applied in sputtering coating, vacuum evaporation coating, coating and other directions, can solve the problems of thermal deformation temperature less than 60℃, limited application scope, low crystallization rate, etc., and achieve low cost , Broaden the scope of application, improve the effect of crystallization rate and content

Active Publication Date: 2022-02-08
厦门蚂蚁云科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although polylactic acid (take the most common PLLA on the market as an example) is a semi-crystalline polymer with a melting point of about 170°C, its crystallization rate is very low, and generally only very poor heat resistance can be obtained under normal processing conditions. The heat distortion temperature of amorphous products is less than 60°C, which greatly limits its application range. For example, in the field of vehicles, the temperature of the outer layer of the car body can reach more than 70°C under direct sunlight in summer. At this time, PLA radiated refrigeration vehicles clothing does not apply

Method used

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  • A kind of heat-resistant, degradable radiation refrigeration film and its preparation method and application
  • A kind of heat-resistant, degradable radiation refrigeration film and its preparation method and application

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preparation example Construction

[0046] The present invention also provides a method for preparing the above-mentioned heat-resistant and degradable radiation cooling film, which comprises:

[0047] S1, pretreatment: drying the poly-L-lactic acid and poly-D-lactic acid, and performing surface treatment on the refrigerated particles with a coupling agent to obtain pretreated refrigerated particles.

[0048] Specifically, dry poly-L-lactic acid and poly-D-lactic acid at 60-70°C for 4-6 hours for later use; take refrigeration particles, add silane coupling agent of 0.5-1wt% by weight of refrigeration particles under stirring, and continue stirring for 15 -30min to get the pretreated refrigeration particles.

[0049] S2, mixing: mix the dried poly-L-lactic acid and poly-D-lactic acid and heat to 60-70°C, add selective nucleating agent, light stabilizer and pre-treated refrigeration particles in turn under stirring, and continue stirring for 15 -30min, when the measured water content is lower than 0.1wt%, the mix...

Embodiment 1

[0056] This embodiment provides a heat-resistant and degradable radiative cooling film, which includes a radiative cooling layer, a reflective layer and a protective layer arranged in sequence, and the thicknesses are 65 μm, 0.15 μm, and 0.08 μm in sequence. In terms of parts by weight, the radiation cooling layer includes 85 parts of poly L-lactic acid, 15 parts of poly D-lactic acid, 0.5 parts of selective nucleating agent TMB-5, 8 parts of silicon dioxide, 0.2 parts of UV326 and 0.08 parts of KH550 . The reflective layer is silver-plated, and the protective layer is silicon oxide.

Embodiment 2

[0058] This embodiment provides a heat-resistant and degradable radiative cooling film, which includes a radiative cooling layer, a reflective layer and a protective layer arranged in sequence, and the thicknesses are 65 μm, 0.15 μm, and 0.08 μm in sequence. In parts by weight, the radiation cooling layer includes 50 parts of poly L-lactic acid, 50 parts of poly D-lactic acid, 0.5 parts of selective nucleating agent TMB-5, 8 parts of silicon dioxide, 0.2 parts of UV326 and 0.08 parts of KH550 . The reflective layer is silver-plated, and the protective layer is silicon oxide.

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Abstract

The invention provides a heat-resistant and degradable radiation refrigeration film and its preparation method and application, and relates to the technical field of radiation refrigeration. The layer comprises a polylactic acid matrix comprising a molten mixture of poly-L-lactic acid and poly-D-lactic acid, a light stabilizer and a coupling agent, and refrigerant particles and selective nucleating agents dispersed in the polylactic acid matrix , the reflective layer is a metal layer. The invention utilizes the melt blending of the two most common enantiomers poly-L-lactic acid and poly-D-lactic acid in polylactic acid to obtain a stereocomplex crystal to modify the polylactic acid radiation refrigeration film and improve its heat resistance , broaden the scope of application.

Description

technical field [0001] The invention relates to the technical field of radiation refrigeration, and in particular to a heat-resistant and degradable radiation refrigeration film and its preparation method and application. Background technique [0002] In the 21st century, human beings are facing more and more severe problems of fossil energy depletion, and excessive energy consumption has also led to excessive emissions of greenhouse gases, thereby causing global warming and various extreme climate changes. Therefore, on the one hand, people are working hard to develop new green and renewable energy sources such as hydrogen energy, solar energy, wind energy, hydrovoltaic energy, etc., and on the other hand, they are also actively looking for new ways to reduce energy consumption. At this time, radiant cooling, as a zero-energy, safe, efficient and clean passive cooling method, has received more and more attention in the past few years, and has great application prospects in ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/04C08K13/02C08K3/36C08K5/544C08K5/3475C08K5/20C08K5/52C08J5/18C08J7/06C23C14/10C23C14/20C23C14/35
CPCC08J5/18C08J7/06C23C14/205C23C14/35C23C14/10C08J2367/04C08J2467/04C08K13/02C08K3/36C08K5/544C08K5/3475C08K5/20C08K5/52
Inventor 陈剑洪唐仕成庄子哲刘跃军钟海长郑伟陈曦
Owner 厦门蚂蚁云科技有限公司