A cost-effective photothermal superhydrophobic coating with micro-and nano-graded structures for efficient solar energy harvesting  

作　　者：Zhuoting Zhou Shujuan Tan Weihan Sun Xiaomeng Guan Tong Xu Guangbin Ji 

机构地区：[1]College of Materials Science and Technology,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China

出　　处：《Journal of Materials Science & Technology》2024年第31期158-165,共8页材料科学技术(英文版)

基　　金：supported by the National Nature Science Foundation of China(No.52373244)。

摘　　要：Solar collector coatings can solve the current energy shortage and environmental pollution by converting clean solar energy into thermal energy.However,once the coating is adhered to a liquid,the performance of the solar thermal conversion will be seriously affected.Here,a cost-effective photothermal superhydrophobic coating was designed by modulating the microstructure of a highly solar-absorbing material(MCN),followed by a simple spraying method combined with polyvinylidene fluoride resin(PVDF).The MCN in the coating provides excellent photothermal conversion performance,hence,the surface temperature of the coating can be rapidly increased to 97.5℃ at 1 kW/m^(2).In addition,the coating achieves a water contact angle(WCA)of 155.79°due to the combined micro-nano structure of MCN and PVDF coupled with the low surface energy of PVDF.More importantly,the coating possesses excellent mechanical properties and can be applied to different substrates.This cost-effective photothermal superhydrophobic coating has promising applications in outdoor environments such as insulated tents and waterproof insulation packaging.

关 键 词：Photothermal conversion SUPERHYDROPHOBICITY Coating Hierarchical structures 

分 类 号：TG1[金属学及工艺—金属学]