Supersonically sprayed transparent flexible multifunctional composites for self-cleaning, anti-icing, anti-fogging, and anti-bacterial applications
- Authors
- Park, Chanwoo; Kim, Taegun; Kim, Yong-Il; Lee, Min Wook; An, Seongpil; Yoon, Sam S.
- Issue Date
- 1-10월-2021
- Publisher
- ELSEVIER SCI LTD
- Keywords
- Anti-bacterial; Anti-fogging; Anti-icing; Multifunctional film; Self-cleaning; Supersonic cold spraying
- Citation
- COMPOSITES PART B-ENGINEERING, v.222
- Indexed
- SCIE
SCOPUS
- Journal Title
- COMPOSITES PART B-ENGINEERING
- Volume
- 222
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/136092
- DOI
- 10.1016/j.compositesb.2021.109070
- ISSN
- 1359-8368
- Abstract
- We used supersonic aerosol deposition to fabricate transparent flexible thin "glass" films, comprising SiO2 and ZnO, with antibacterial, superhydrophilic, and anti-fog properties. A polystyrene solution, which was supersonically sprayed onto the glass film to augment the superhydrophobicity, endowed the film with self-cleaning and anti-frost characteristics. The glass films have a thickness of 2-2.5 mu m with a maximum roughness of approximately 0.25 mu m. The sprayed polystyrene (PS) layer (approximately 200 nm thick) decreased the transparency of the film to 80% relative to that of the pure glass film (90%) at 580 nm. The large water contact angle of 165 degrees renders the PS-coated glass film superhydrophobic, which slows the nucleation of condensing droplets and delays the subsequent formation of ice, known as the anti-frost or anti-icing effect. The superhydrophobicity is also responsible for the self-cleaning effect of the rolling droplets over a tilted substrate. The hydrophilicity of the glass-coated film (or simply, glass film) without PS facilitated the formation of a thin liquid layer, which minimized light scattering and augmented the anti-fog effect. Finally, the bacterial inhibition rates of the glass and PS-coated glass films were 97.5% and 96.3%, respectively. These multifunctional films are expected to minimize the transmission of bacteria resulting from physical contact.
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Collections - College of Engineering > Department of Mechanical Engineering > 1. Journal Articles
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