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Related Experiment Video

Updated: Jul 2, 2026

Construction of Modular Hydrogel Sheets for Micropatterned Macro-scaled 3D Cellular Architecture

Construction of Modular Hydrogel Sheets for Micropatterned Macro-scaled 3D Cellular Architecture

Published on: January 11, 2016

Multi-scale structural engineering enables thermochromic organic-inorganic hydrogels for robust smart windows.

Wanlin Wu¹, Canhui Lu¹, Helmut Cölfen²

¹National Key Laboratory of Advanced Polymer Materials Polymer Research Institute of Sichuan University, Chengdu, 610065, China. canhuilu@scu.edu.cn.

Materials Horizons

|July 11, 2025

Summary

This study introduces a novel thermochromic organic-inorganic hydrogel for smart windows. This material offers high transparency and solar modulation, improving energy efficiency and impact resistance.

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Area of Science:

Materials Science
Nanotechnology
Sustainable Energy

Background:

Thermochromic smart windows are crucial for building energy management.
Existing smart windows face limitations like low transparency, poor solar control, narrow temperature ranges, and instability.

Purpose of the Study:

To develop a scalable, recyclable thermochromic organic-inorganic hydrogel for advanced smart windows.
To overcome the limitations of current smart window technologies.

Main Methods:

Multi-scale structural engineering: microscale self-densification, nanoscale thermal-responsive clusters, molecular amorphous minerals.
Utilizing reversible phase separation of organic-inorganic nanoclusters for state switching.

Main Results:

Achieved 99% transparency and 86.1% solar modulation—a record combination for thermochromic materials.
Demonstrated broadly tunable transition temperature, excellent long-term stability, and recyclability.
Enhanced impact resistance due to favorable energy absorption and adhesion properties.

Conclusions:

The developed organic-inorganic hydrogel offers a sustainable and innovative solution for thermochromic smart windows.
The material is low-cost, easily fabricated, and mass-producible, combining superior thermal regulation, impact resistance, and recyclability.