Facile preparation of superhydrophobic candle soot coating and its wettability under condensation
- PDF / 3,749,089 Bytes
- 9 Pages / 595.276 x 790.866 pts Page_size
- 25 Downloads / 194 Views
Facile preparation of superhydrophobic candle soot coating and its wettability under condensation Zhiqing Yuan1 • Juan Huang1 • Chaoyi Peng2 • Menglei Wang1 • Xian Wang1 Jiping Bin1 • Suli Xing2 • Jiayu Xiao2 • Jingcheng Zeng2 • Ximei Xiao1 • Xin Fu1 • Huifang Gong1 • Dejian Zhao1 • Hong Chen3
•
Received: 24 September 2015 / Accepted: 24 January 2016 / Published online: 8 February 2016 Springer-Verlag Berlin Heidelberg 2016
Abstract A facile method was developed to prepare a superhydrophobic candle soot coating by burning candle and simple deposition on a low-density polyethylene substrate. The water contact angle and sliding angle of the asprepared superhydrophobic candle soot coating were, respectively, 160 ± 2 and 1 under common condition. ESEM images showed that the superhydrophobic candle soot coating was comprised of many nanoparticles with the size range of about 30–50 nm. After condensation for 30 min, the average contact angle of the condensed water droplets was 150 ± 2, showing excellent superhydrophobicity under condensation. The mechanism of the candle soot coating remaining superhydrophobicity under condensation was analyzed. This work is helpful for the design and preparation of superhydrophobic surface which can remain superhydrophobicity in future.
& Zhiqing Yuan [email protected]; [email protected] & Chaoyi Peng [email protected] 1
School of Packaging and Materials Engineering, Hunan University of Technology, Zhuzhou 412007, Hunan, People’s Republic of China
2
Department of Material Science and Engineering, College of Aerospace Science and Engineering, National University of Defense Technology, Changsha 410073, Hunan, People’s Republic of China
3
Central South University of Forestry and Technology, Changsha 410004, Hunan, People’s Republic of China
1 Introduction Surfaces with water contact angle [150 and sliding angle \10 are commonly regarded as superhydrophobic surfaces [1–7]. Superhydrophobic surfaces have great potential industrial and biological applications such as selfcleaning [8, 9], antigravity transportation of water [10], dispersing and manipulating the fluid droplets [11], solar evaporation enhancement [12], anti-icing [5, 13–16], and anticorrosion [17–19]. However, their practical applications have been limited by low stability under dew condensation [14, 20–24]. For example, a study by Cheng et al. [25] showed that the condensed water formed ‘‘sticky’’ droplets that remained on lotus leaf surfaces at any tilt angle and the water contact angle was\90, indicating that the classical superhydrophobic lotus leaves would lost their superhydrophobicity under condensation. Besides, Mockenhaunpt et al. [26] studied the stability of eight superhydrophobic plants (Alocasia macrorrhiza, Apocynum cannabinum, Brassica oleracea, Argemone mexicana, Tropaeolum majus, Xanthosoma robustum, Colocasia esculenta, and Nelumbo nucifera) and found that water condensation caused an increased wettability and a decrease in contact angle on most superhydrophobic surfaces. In practical a
Data Loading...
