Bioinspired photothermal polyaniline composite polyurethane sponge: Interlayer engineering for high-concentration seawater desalination

Interfacial solar evaporation has attracted substantial research interest as an eco-friendly means of desalination. A great deal work been devoted to exploring broad-spectrum absorbers, porous floating systems, and appropriate thermal insulations. During desalination, salt accumulation may block the channel severely decline rate. Herein, we designed a salt-resistant evaporator ([email protected]) based on polyurethane sponge (PU) with polyaniline (PANI) photothermal layer negatively charged sulfonated polyphenylsulfone (SPPSU) interlayer. The interlayer appends energy barrier, which reduces amount ions diffusing into regulates local concentration. By this structure, enables stable from wide range salinity (even saturation concentration), achieves high rate above 1.91 kg/m2 h in 10 wt% NaCl (at state art). promising mechanism via synergy diffusion effect Donnan is also proposed work. Therefore, it provides pathway for practical solar-powered high-salinity seawater