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<p>Passive radiative cooling (PRC) films have attracted increasing attention recently owing to its significant technological advancement of no requirement for external energy sources. However, present PRC films extremely rely on inorganic nanomaterials, resulting in their poor flexibility, complicated components and unreliable compatibility (between inorganic nanomaterials and polymer matrix). In this study, electrospinning method was employed to prepare polylactic acid (PLA)/polytetrafluoroethylene (PTFE) hybrid all-polymer membranes for daytime radiative cooling in a facile and controllable way. This membrane consists of PLA/PTFE nanofibers with bead-like structure but no inorganic nanomaterials, indeed showing high average solar reflectance (~ 88%) and infrared emissivity (~ 91%). Moreover, the PLA/PTFE membrane achieved a maximum temperature reduction of 6.1&#xa0;°C and a net cooling power of 61.9&#xa0;W/m<sup>2</sup> under direct sunlight, a performance theoretically validated by COMSOL simulations. Additionally, this membrane exhibited superior hydrophobicity with a water contact angle of ~ 120°, enabling favorable environmental anti-fouling potential. Subsequent exploration of specific thermal management applications further confirmed the practical value of the membrane. In summary, this work presents a facile and controllable pathway for fabricating low-cost, high-performance, inorganic-free radiative cooling materials, offering a promising solution for sustainable thermal management in applications ranging from personal textiles to vehicles.</p> Graphical abstract <p></p> <p>In this work, electrospinning method was employed to prepare PLA/PTFE hybrid all-polymer membranes for daytime radiative cooling in a facile and controllable way. This membrane consists of PLA/PTFE nanofibers with bead-like structure but no inorganic nanomaterials, indeed showing high average solar reflectance (~ 88%) and infrared emissivity (~ 91%). In outdoor performance tests, the fibrous membranes in this study achieved a maximum daytime cooling of 6.1&#xa0;°C, demonstrating significant cooling performance. Therefore, the present work provides some inspiration for the study of radiation-cooled fiber membranes.</p>

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Scalable electrospun PLA/PTFE hybrid all-polymer membranes with bead-like structure for efficient passive radiative cooling

  • 期刊论文

  • 发表日期：

    2026年7月9日

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  • Peng Wang,
  • Qingsong Zhu,
  • Fei Peng,
  • Wei Li,
  • Renjie Wang,
  • He Zhu

摘要

Passive radiative cooling (PRC) films have attracted increasing attention recently owing to its significant technological advancement of no requirement for external energy sources. However, present PRC films extremely rely on inorganic nanomaterials, resulting in their poor flexibility, complicated components and unreliable compatibility (between inorganic nanomaterials and polymer matrix). In this study, electrospinning method was employed to prepare polylactic acid (PLA)/polytetrafluoroethylene (PTFE) hybrid all-polymer membranes for daytime radiative cooling in a facile and controllable way. This membrane consists of PLA/PTFE nanofibers with bead-like structure but no inorganic nanomaterials, indeed showing high average solar reflectance (~ 88%) and infrared emissivity (~ 91%). Moreover, the PLA/PTFE membrane achieved a maximum temperature reduction of 6.1 °C and a net cooling power of 61.9 W/m2 under direct sunlight, a performance theoretically validated by COMSOL simulations. Additionally, this membrane exhibited superior hydrophobicity with a water contact angle of ~ 120°, enabling favorable environmental anti-fouling potential. Subsequent exploration of specific thermal management applications further confirmed the practical value of the membrane. In summary, this work presents a facile and controllable pathway for fabricating low-cost, high-performance, inorganic-free radiative cooling materials, offering a promising solution for sustainable thermal management in applications ranging from personal textiles to vehicles.

Graphical abstract

In this work, electrospinning method was employed to prepare PLA/PTFE hybrid all-polymer membranes for daytime radiative cooling in a facile and controllable way. This membrane consists of PLA/PTFE nanofibers with bead-like structure but no inorganic nanomaterials, indeed showing high average solar reflectance (~ 88%) and infrared emissivity (~ 91%). In outdoor performance tests, the fibrous membranes in this study achieved a maximum daytime cooling of 6.1 °C, demonstrating significant cooling performance. Therefore, the present work provides some inspiration for the study of radiation-cooled fiber membranes.