Switchable wettability applicable to nonplanar surfaces

Bo Wang; Xiaohan Xue; Xiaocheng Liu; Pavel Neuzžil; Binghe Ma; Weizheng Yuan; Jian Luo; Chengyu Jiang

doi:10.1016/j.apmt.2018.09.012

Switchable wettability applicable to nonplanar surfaces

Bo Wang
, Xiaohan Xue
, Xiaocheng Liu
, Pavel Neuzžil
, Binghe Ma
, Weizheng Yuan
, Jian Luo
, Chengyu Jiang

Northwestern Polytechnical University Xian

Research output: Contribution to journal › Article › peer-review

8 Scopus citations

Abstract

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 (F_D). An experiment showed an unprecedented modulation value of ≈79%; that is, the F_D 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 F_D based on the desired tasks, either to lower it or to increase it for saving energy or deceleration.

Original language	English
Pages (from-to)	271-275
Number of pages	5
Journal	Applied Materials Today
Volume	13
DOIs	https://doi.org/10.1016/j.apmt.2018.09.012
State	Published - Dec 2018

Keywords

Hydrodynamic drag force
PTFE microparticles spray
Surface micro-structure
Temperature-sensitive polymer
Wettability

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10.1016/j.apmt.2018.09.012

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@article{ec5df65df20d42359221d447c3b08dff,

title = "Switchable wettability applicable to nonplanar surfaces",

abstract = "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.",

keywords = "Hydrodynamic drag force, PTFE microparticles spray, Surface micro-structure, Temperature-sensitive polymer, Wettability",

author = "Bo Wang and Xiaohan Xue and Xiaocheng Liu and Pavel Neuz{\v z}il and Binghe Ma and Weizheng Yuan and Jian Luo and Chengyu Jiang",

note = "Publisher Copyright: {\textcopyright} 2018 Elsevier Ltd",

year = "2018",

month = dec,

doi = "10.1016/j.apmt.2018.09.012",

language = "英语",

volume = "13",

pages = "271--275",

journal = "Applied Materials Today",

issn = "2352-9407",

publisher = "Elsevier Ltd",

}

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

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 - https://www.scopus.com/pages/publications/85054155611

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 -

Switchable wettability applicable to nonplanar surfaces

Abstract

Keywords

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