Technology

Preparation of Infrared Stealth Coating and Synthetic Leather

  • WEI H ,
  • LUO H H ,
  • XIANG J ,
  • et al
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  • 1. The Key Laboratory for Leather Chemistry and Engineering of Ministry of Education,Sichuan University,Chengdu 610065,China;

    2. The State Key Laboratory of Polymer Materials Engineering,Sichuan University,Chengdu 610065,China

Online published: 2024-12-01

Abstract

Using waterborne polyurethane as film-forming material,gallic acid(GA)-modified MXene(MX@GA) as low emissivity material,and thermal expandable microspheres(TEMs)as foaming agent,the infrared stealth coating integrating low emissivity and thermal insulation was prepared and employed in the manufacture of polyurethanesynthetic leather. The morphology and structural stability of MX@GA were characterized usingultraviolet-visible spectrophotometer(UV-Vis)and atomic force microscope(AFM),etc. And the infrared emissivity,thermal conductivity,softness,resilience and water vapor permeabilityof the coating were also tested. It was found that graft of GA improved the structural stability ofMXene. When the MX@GA content was 10%,the infrared emissivity of the coating decreasedto 0. 273. Microsphere foaming endowed the coating with a uniform porous structure,when 3% TEMs was added,the thermal conductivity of the coating decreased from 0. 183 W/(m·K)to 0. 038 W/(m·K),softness and resilience were increased by more than 20%,and water vapor permeability was improved to 49. 66 g/(m2·h). Benefiting from the synergistic effect of low emissivity and heat insulation,the surface temperature detected by infrared thermal imager ofthe synthetic leather on a 60 ℃ heating plate was close to the ambient temperature(the temperature difference was only 10 ℃),showing excellent infrared stealth performance. 



Cite this article

WEI H , LUO H H , XIANG J , et al . Preparation of Infrared Stealth Coating and Synthetic Leather[J]. Paint & Coatings Industry, 2024 , 54(12) : 25 -33 . DOI: 10.12020/j.issn.0253-4312.2024-215

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