TY - JOUR
T1 - Switchable wettability applicable to nonplanar surfaces
AU - Wang, Bo
AU - Xue, Xiaohan
AU - Liu, Xiaocheng
AU - Neuzžil, Pavel
AU - Ma, Binghe
AU - Yuan, Weizheng
AU - Luo, Jian
AU - Jiang, Chengyu
N1 - Publisher Copyright:
© 2018 Elsevier Ltd
PY - 2018/12
Y1 - 2018/12
N2 - We present a temperature-responsive hydrophilic–hydrophobic switchable coating (S3C) applicable to nonplanar surfaces and based on a temperature-responsive polymer with embedded sprayed microparticles. The S3C was hydrophilic at lower temperature, with contact angle (CA) of ≈6.7° and hydrophobic with CA of ≈138.7° at higher temperature, with a transition temperature of ≈34.4 °C. We investigated the influence of a streamline-shaped object coated with S3C on the hydrodynamic drag force (FD). An experiment showed an unprecedented modulation value of ≈79%; that is, the FD changes from (0.79 ± 0.04) mN at a temperature of ≈20 °C to (0.17 ± 0.13) mN at 50 °C. This type of coating could be employed for various devices such as underwater vehicles to modulate FD based on the desired tasks, either to lower it or to increase it for saving energy or deceleration.
AB - We present a temperature-responsive hydrophilic–hydrophobic switchable coating (S3C) applicable to nonplanar surfaces and based on a temperature-responsive polymer with embedded sprayed microparticles. The S3C was hydrophilic at lower temperature, with contact angle (CA) of ≈6.7° and hydrophobic with CA of ≈138.7° at higher temperature, with a transition temperature of ≈34.4 °C. We investigated the influence of a streamline-shaped object coated with S3C on the hydrodynamic drag force (FD). An experiment showed an unprecedented modulation value of ≈79%; that is, the FD changes from (0.79 ± 0.04) mN at a temperature of ≈20 °C to (0.17 ± 0.13) mN at 50 °C. This type of coating could be employed for various devices such as underwater vehicles to modulate FD based on the desired tasks, either to lower it or to increase it for saving energy or deceleration.
KW - Hydrodynamic drag force
KW - PTFE microparticles spray
KW - Surface micro-structure
KW - Temperature-sensitive polymer
KW - Wettability
UR - http://www.scopus.com/inward/record.url?scp=85054155611&partnerID=8YFLogxK
U2 - 10.1016/j.apmt.2018.09.012
DO - 10.1016/j.apmt.2018.09.012
M3 - 文章
AN - SCOPUS:85054155611
SN - 2352-9407
VL - 13
SP - 271
EP - 275
JO - Applied Materials Today
JF - Applied Materials Today
ER -