Abstract
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 superhy-drophobic 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 temper-ature of the coating can be rapidly increased to 97.5 ℃ at 1 kW/m2.In addition,the coating achieves a water contact angle(WCA)of 155.79° due to the combined micro-nano structure of MCN and PVDF cou-pled 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 superhydropho-bic coating has promising applications in outdoor environments such as insulated tents and waterproof insulation packaging.
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