Energy-Saving VO<sub>2</sub> Bilayer Films with Self-Cleaning and Self-Healing for Smart Windows
Thermochromic VO<sub>2</sub> has garnered widespread attention with unique optical regulation in the fields of smart windows. However, VO<sub>2</sub> windows with persistent stability and optical tunability in an outdoor environment are still a challenge. This study presents a multifunctional VO<sub>2</sub> film, including a thermochromic VO<sub>2</sub>/polymer layer with VO<sub>2</sub> particles dispersed in a urea-polydimethylsiloxane (uPDMS) matrix and a smooth liquid-infused porous surface (SLIPS) layer with silicone oil filling in porous structures. Entrapping VO<sub>2</sub> particles within the urea-polydimethylsiloxane net ensures thermochromic stability. The extensive hydrogen bonds between urea groups and highly mobile polydimethylsiloxane chains ensure the self-healing performance, while the upper SLIPS layer offers the self-cleaning performance. This bilayer composite film demonstrates excellent solar modulation ability (Δ<i>T</i><sub>sol</sub> = 20.25%), adequate visible light transmittance (<i>T</i><sub>lum,c</sub> = 47.78%), a remarkable self-cleaning performance (RA = 8.9°), and notable self-healing abilities (healing rate = 88.48%). The research herein offers a reliable approach for fabricating stable smart energy-saving window films.
Authors
- Yangxin Wang (ORCID: https://orcid.org/0000-0001-5030-7279)
- Huaixia Zhao (ORCID: https://orcid.org/0000-0001-9684-0271)
- Tanghao Zheng
- Xusheng Wang (ORCID: https://orcid.org/0000-0001-5872-8502)
- Feng Yang (ORCID: https://orcid.org/0000-0002-8857-1427)
- Ruiwen Jiang
- Wangwang Cai
Institutions
- Zhejiang Sci-Tech University (CN)
- Nanjing Tech University (CN)
- Sichuan University (CN)
- Institute of Molecular Functional Materials (CN)
- Division of Materials Science and Engineering (AU)
Publication Details
- Journal
- ACS Applied Materials & Interfaces
- Published
- 2025-05-01
- DOI
- https://doi.org/10.1021/acsami.5c05493
- Citations
- 5
- Primary Topic
- Transition Metal Oxide Nanomaterials
- Type
- article
- Field-Weighted Citation Impact
- 3.03
Funders
- National Natural Science Foundation of China
- Nanjing Tech University
- Priority Academic Program Development of Jiangsu Higher Education Institutions
- Natural Science Research of Jiangsu Higher Education Institutions of China