2026-10-14T07:01:50Z https://api.figshare.com/v2/oai

oai:figshare.com:article/33826851 2026-09-16T02:07:25Z category_1 category_146 category_915 category_21 category_272 category_873 category_39 category_502 category_734 category_64 portal_63 item_type_2 month_year_09_2026

Hierarchically Structured Fluorine-Free Superhydrophobic Composite Films for Efficient and Durable Passive Daytime Radiative Cooling Xin Zhang (35492) Ying Zhen Gong (24959250) Jia Li Xing (24959253) Yi Hu (58993) Biophysics Space Science Physical Sciences not elsewhere classified Biotechnology Environmental Sciences not elsewhere classified Chemical Sciences not elsewhere classified Ecology Astronomical and Space Sciences not elsewhere classified Biological Sciences not elsewhere classified Cancer wearable thermal management smart textile applications resulting film achieves offering promising potential intrinsic vibrational modes infrared thermal emission conventional polyester canvas 78 %, delivering outdoor tests relative exceptional environmental durability average solar reflectance 58 ° c water contact angle hierarchically structured fluorine efficient thermal radiation densely packed pdms water washing solar scattering sliding angle outdoor shading environmental contamination 8 ° work demonstrates window emissivity temperature reduction synergistically incorporated sustaining superhydrophobicity superhydrophobic tpu robust strategy rinsing treatments performance degradation pdms within interfacial wettability hierarchical micro fabricated via designing fluorine 35 °, Passive daytime radiative cooling (PDRC) offers continuous cooling without external energy input, yet conventional radiative cooling materials often suffer from environmental contamination and performance degradation, while fluorinated systems raise ecological concerns. Here, we report a fluorine-free, superhydrophobic TPU/PDMS@HGM radiative cooling film with a hierarchical micro/nanostructure, fabricated via a scalable electrostatic spraying approach. Polydimethylsiloxane (PDMS)-modified hollow glass microspheres (HGM) were synergistically incorporated to enhance both solar scattering and interfacial wettability. The densely packed PDMS@HGM network introduces multiple photon backscattering pathways, effectively suppressing solar absorption, while the intrinsic vibrational modes of PDMS within the atmospheric window promote mid-infrared thermal emission. The resulting film achieves an average solar reflectance of 96.46% and an atmospheric-window emissivity of 91.78%, delivering a temperature reduction of 12.58 °C in outdoor tests relative to conventional polyester canvas. Simultaneously, the hierarchical rough surface maintains a stable Cassie–Baxter wetting state, with a water contact angle of 152.8° and a sliding angle of 6.35°, while sustaining superhydrophobicity after acid–alkali immersion, water washing, and dirt-rinsing treatments. This work demonstrates a robust strategy for designing fluorine-free flexible radiative cooling materials that combine high solar reflectance, efficient thermal radiation, and exceptional environmental durability, offering promising potential for wearable thermal management, outdoor shading, and smart textile applications. 2026-09-15T00:00:00Z Dataset Media 10.1021/acsapm.6c03464.s002 https://figshare.com/articles/media/Hierarchically_Structured_Fluorine-Free_Superhydrophobic_Composite_Films_for_Efficient_and_Durable_Passive_Daytime_Radiative_Cooling/33826851 CC BY-NC 4.0