Construction of highly hydrophobic and fast endothermic surfaces using candle soot and nano-TiO2
Author:
Liu Hao1,
Du Yangfan1,
Zhou Qianyu12,
Wang Shifeng12,
Gao Qi2
Affiliation:
1. Tibet University Innovation Laboratory of Materials for Energy and Environment Technologies, Institute of Oxygen Supply, , Lhasa 850000, P.R. China
2. Ministry of Education Key Laboratory of Cosmic Rays (Tibet University), , Lhasa 850000, P.R. China
Abstract
Abstract
This work combines hydrophobic and heat-absorbing materials to solve the problem of water and frost resistance in industrial and domestic scenarios in harsh environments. Here, highly hydrophobic and fast endothermic (HHFE) surfaces were prepared by applying candle soot (nanocarbon) as the template, slides as the carrier and nano-TiO2 as a backbone and a connecting layer. The resulting HHFE surface exhibited a coral-like porous structure, which is beneficial to hydrophobic performance. The contact angle between the water droplet and the glass with the HHFE coating was about 120°, thus implying that the prepared HHFE surface with a TiO2 skeleton layer has excellent hydrophobicity. The hydrophobic mechanism of the HHFE surface can be explained by the Cassie–Baxter model. Infrared thermography and thermometry were used to record the thermal capacity and heat-absorbing rate of the HHFE surface. The temperature of the glass covered with the HHFE coating rose from 16°C to 38°C within 5 minutes, which is 46.2% higher in capacity and 2.2 times faster in rate than ordinary glass under the same solar irradiation. The resulting HHFE thin film consists of nanocarbon materials, and nano-TiO2 particles were hydrophobic and good heat absorbers. They have great potential for anti-freezing and water-proofing applications, especially in harsh environments.
Funder
Natural Science Foundation of Tibet Autonomous Region
Central Support for the Ministry-Autonomous Region Joint Construction of the Collaborative Innovation Center for Human Activities and Regional Development around the Himalayas
Everest Discipline Construction Project of Tibet University
Central Government Funds for Local Scientific and Technological Development
National Natural Science Foundation of China
Publisher
Oxford University Press (OUP)
Subject
General Environmental Science,Architecture,Civil and Structural Engineering
Cited by
1 articles.
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