Biomimetic Design of Breathable 2D Photothermal Fabric with Three‐Layered Structure for Efficient Four‐Plane Evaporation of Seawater

Abstract 2D photothermal membranes have demonstrated numerous advantages in solar desalination due to their flexibility, scalability, and low cost. However, their practical applications are limited by the restricted evaporation area and obstructed vapor channels. A biomimetic design of the breathable 2D photothermal fabric is reported, which is composed of two carbon‐nanotube‐hydrogel‐coated polyester (PET) fabrics separated by fiber pillars, with the upper fabric layer having a hole array as stomatal channels. This fabric shows high solar‐absorption efficiency (96.1%) and decreased water‐evaporation enthalpy (1664.6 kJ kg −1 ). The hanging fabric as a heliotropic evaporator exhibits four‐plane evaporation…

• NN
  National Natural Science Foundation of China

  Award: 52161145406,42376045
• NK
  National Key Research and Development Program of China

  Award: 2022YFB3804902,2022YFB3804900
• FR
  Fundamental Research Funds for the Central Universities

  Award: 2232024Y‐01,CUSF‐DH‐T‐2023023