What question did this study set out to answer?

The aim is to develop a hydrogel-based material that combines passive cooling with self-cleaning features.

February 19, 2026Journal of Materials Chemistry A0 citations

A hydrogel-based passive cooling Janus material with both high solar reflectance and remarkable self-cleaning capability

QXQingxi XinXi'an Jiaotong University KCKefan ChenElectric Power Research Institute LMLijing MaXi'an Jiaotong University

Key Points

The aim is to develop a hydrogel-based material that combines passive cooling with self-cleaning features.
Created a monolayer hydrogel material
Incorporated Janus wettability with hydrophobic properties
Measured solar reflectance and cooling effects
Achieved a high solar reflectance of 80.06%
Demonstrated a hydrophobic upper surface angle of 133°
Enabled effective self-cleaning capabilities

Abstract

A monolayer hydrogel-based passive cooling material with Janus wettability and high solar reflectance is proposed. The hydrophobic upper surface (133°) enables self-cleaning, while the high solar reflectance (80.06%) reduces solar heat gain.

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