cff-version: 1.2.0
abstract: "<p>Growing environmental concerns are driving demand for energy-saving strategies. Thermochromic smart windows offer a practical solution by passively regulating sunlight in homes and offices. Despite recent progress, current technologies still face challenges in achieving the thermal durability and mechanical robustness necessary for long-term use, combined with a rapid transition below 30°C. Here we report a thermochromic hydrogel assembled from poly(N,N-dimethylaminoethyl methacrylate) and 2,2,2-trifluoroethyl methacrylate that produces flexible films on a large scale. This hydrogel rapidly (∆t ≈ 3 s) and reversibly becomes turbid above a tunable transition temperature spanning the human comfort zone, and maintains its thermochromic property even when mechanically stretched with 500% strain. The film’s high modulation of solar transmittance (70.6%) and luminous transmittance (85.7%) enables efficient sunlight screening in hot weather and clear vision in cool weather. Such ‘smart windows’ remain stable for over 10,000 heating/cooling cycles. These combined features indicate the hydrogel suitability for applications ranging from heat-modulating smart windows (architectural, automotive, etc.) to passive temperature indicators and even wearables.</p>"
authors:
  - family-names: Jiang
    given-names: Fan
    orcid: "https://orcid.org/0009-0009-4316-2468"
  - family-names: Yu
    given-names: Kui
    orcid: "https://orcid.org/0000-0003-3673-8843"
  - family-names: Kieffer
    given-names: Roland
  - family-names: de Jong
    given-names: Djanick
    orcid: "https://orcid.org/0000-0002-2936-9317"
  - family-names: M. Parker
    given-names: Richard
  - family-names: Vignolini
    given-names: Silvia
    orcid: "https://orcid.org/0000-0003-0664-1418"
  - family-names: Aubin-Tam
    given-names: Marie-Eve
title: "Data underlying the publication: Thermochromic Hydrogel with High Transmittance Modulation and Fast Response for Flexible Smart Windows"
keywords:
version: 1
identifiers:
  - type: doi
    value: 10.4121/87510030-e06a-42fc-831b-9b8e01470bca.v1
license: CC BY-NC 4.0
date-released: 2025-09-05