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Kouser T, Xiong Y, Yang D. Contribution of Superhydrophobic Surfaces and Polymer Additives to Drag Reduction. CHEMBIOENG REVIEWS 2021. [DOI: 10.1002/cben.202000036] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Taiba Kouser
- Huazhong University of Science and Technology (HUST) Department of Mechanics 430074 Wuhan China
| | - Yongliang Xiong
- Huazhong University of Science and Technology (HUST) Department of Mechanics 430074 Wuhan China
- Hubei Key Laboratory of Engineering Structural Analysis and Safety Assessment Luoyu Road 1037 430074 Wuhan China
| | - Dan Yang
- Huazhong University of Science and Technology (HUST) School of Naval Architecture and Ocean Engineering 430074 Wuhan China
- Huazhong University of Science and Technology (HUST) Hubei Key Laboratory of Naval Architecture & Ocean Engineering Hydrodynamics 430074 Wuhan China
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Role of Liquid Repellency on Fluid Slip, Fluid Drag, and Formation of Nanobubbles. Biomimetics (Basel) 2018. [DOI: 10.1007/978-3-319-71676-3_18] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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Qu M, Ma X, He J, Feng J, Liu S, Yao Y, Hou L, Liu X. Facile Selective and Diverse Fabrication of Superhydrophobic, Superoleophobic-Superhydrophilic and Superamphiphobic Materials from Kaolin. ACS APPLIED MATERIALS & INTERFACES 2017; 9:1011-1020. [PMID: 27959496 DOI: 10.1021/acsami.6b10964] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
As the starting material, kaolin is selectively and diversely fabricated to the superhydrophobic, superoleophobic-superhydrophilic, and superamphiphobic materials, respectively. The wettability of the kaolin surface can be selectively controlled and regulated to different superwetting states by choosing the corresponding modification reagent. The procedure is facile to operate, and no special technique or equipment is required. In addition, the procedure is cost-effective and time-saving and the obtained super-repellent properties are very stable. The X-ray photoelectron spectroscopy analysis demonstrates different changes of kaolin particles surfaces which are responsible for the different super-repellency. The scanning electron microscopy displays geometric micro- and nanometer structures of the obtained three kinds of super-repellent materials. The results show that kaolin has good applications in many kinds of superwetting materials. The method demonstrated in this paper provides a new strategy for regulating and controlling the wettability of solid surfaces selectively, diversely, and comprehensively.
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Affiliation(s)
- Mengnan Qu
- College of Chemistry and Chemical Engineering, Xi'an University of Science and Technology , Xi'an 710054, China
| | - Xuerui Ma
- College of Chemistry and Chemical Engineering, Xi'an University of Science and Technology , Xi'an 710054, China
| | - Jinmei He
- College of Chemistry and Chemical Engineering, Xi'an University of Science and Technology , Xi'an 710054, China
| | - Juan Feng
- College of Chemistry and Chemical Engineering, Xi'an University of Science and Technology , Xi'an 710054, China
| | - Shanshan Liu
- College of Chemistry and Chemical Engineering, Xi'an University of Science and Technology , Xi'an 710054, China
| | - Yali Yao
- College of Chemistry and Chemical Engineering, Xi'an University of Science and Technology , Xi'an 710054, China
| | - Lingang Hou
- College of Chemistry and Chemical Engineering, Xi'an University of Science and Technology , Xi'an 710054, China
| | - Xiangrong Liu
- College of Chemistry and Chemical Engineering, Xi'an University of Science and Technology , Xi'an 710054, China
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Ahmad K, Zhao X, Pan Y. Effect of surface morphology on measurement and interpretation of boundary slip on superhydrophobic surfaces. SURF INTERFACE ANAL 2016. [DOI: 10.1002/sia.6197] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Khurshid Ahmad
- Key Laboratory of Micro-Systems and Micro-Structures Manufacturing, Ministry of Education and School of Mechatronics Engineering; Harbin Institute of Technology; Harbin 150001 China
- Department of Mechanical Engineering, Main Campus; University of Engineering and Technology; Peshawar Pakistan
| | - Xuezeng Zhao
- Key Laboratory of Micro-Systems and Micro-Structures Manufacturing, Ministry of Education and School of Mechatronics Engineering; Harbin Institute of Technology; Harbin 150001 China
| | - Yunlu Pan
- Key Laboratory of Micro-Systems and Micro-Structures Manufacturing, Ministry of Education and School of Mechatronics Engineering; Harbin Institute of Technology; Harbin 150001 China
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Li D, Jing D, Pan Y, Bhushan B, Zhao X. Study of the Relationship between Boundary Slip and Nanobubbles on a Smooth Hydrophobic Surface. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:11287-11294. [PMID: 27684436 DOI: 10.1021/acs.langmuir.6b02877] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Surface nanobubbles, which are nanoscopic or microscopic gaseous domains forming at the solid/liquid interface, have a strong impact on the interface by changing the two-phase contact to a three-phase contact. Therefore, they are believed to affect the boundary condition and liquid flow. However, there are still disputes in the theoretical studies as to whether the nanobubbles can increase the slip length effectively. Furthermore, there are still no direct experimental studies to support either side. Therefore, an intensive study on the effective slip length for flows over bare surfaces with nanobubbles is essential for establishing the relation between nanobubbles and slip length. Here, we study the effect of nanobubbles on the slippage experimentally and theoretically. Our experimental results reveal an increase from 8 to 512 nm in slip length by increasing the surface coverage of nanobubbles from 1.7 to 50.8% and by decreasing the contact angle of nanobubbles from 42.8 to 16.6°. This is in good agreement with theoretical results. Our results indicate that nanobubbles could always act as a lubricant and significantly increase the slip length. The surface coverage, height, and contact angle are key factors for nanobubbles to reduce wall friction.
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Affiliation(s)
- Dayong Li
- School of Mechanical and Electrical Engineering, Harbin Institute of Technology , Harbin 150001, China
- School of Mechanical Engineering, Heilongjiang University of Science and Technology , Harbin 150022, China
| | - Dalei Jing
- School of Mechanical and Electrical Engineering, Harbin Institute of Technology , Harbin 150001, China
- School of Mechanical Engineering, University of Shanghai for Science and Technology , Shanghai 200093, China
| | - Yunlu Pan
- School of Mechanical and Electrical Engineering, Harbin Institute of Technology , Harbin 150001, China
| | - Bharat Bhushan
- School of Mechanical and Electrical Engineering, Harbin Institute of Technology , Harbin 150001, China
- Nanoprobe Laboratory for Bio- & Nanotechnology and Biomimetics (NLB2), The Ohio State University , 201 W. 19th Avenue, Columbus, Ohio 43210-1142, United States
| | - Xuezeng Zhao
- School of Mechanical and Electrical Engineering, Harbin Institute of Technology , Harbin 150001, China
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Ahmad K, Zhao X, Pan Y, Hussain D. Characterization of spherical domains at the polystyrene thin film-water interface. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2016; 7:581-590. [PMID: 27335748 PMCID: PMC4901549 DOI: 10.3762/bjnano.7.51] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/30/2015] [Accepted: 04/05/2016] [Indexed: 06/06/2023]
Abstract
Spherical domains that readily form at the polystyrene (PS)-water interface were studied and characterized using atomic force microscopy (AFM). The study showed that these domains have similar characteristics to micro- and nanobubbles, such as a spherical shape, smaller contact angle, low line tension, and they exhibit phase contrast and the coalescence phenomenon. However, their insensitivity to lateral force, absence of long-range hydrophobic attraction, and the presence of possible contaminants and scratches on these domains suggested that these objects are most likely blisters formed by the stretched PS film. Furthermore, the analysis of the PS film before and after contact with water suggested that the film stretches and deforms after being exposed to water. The permeation of water at the PS-silicon interface, caused by osmosis or defects present on the film, can be a reasonable explanation for the nucleation of these spherical domains.
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Affiliation(s)
- Khurshid Ahmad
- Key Laboratory of Micro-Systems and Micro-Structures Manufacturing, Ministry of Education and School of Mechatronics Engineering, Harbin Institute of Technology, Harbin 150001, P.R. China
- Department of Mechanical Engineering, Main Campus, University of Engineering and Technology, Peshawar, Pakistan
| | - Xuezeng Zhao
- Key Laboratory of Micro-Systems and Micro-Structures Manufacturing, Ministry of Education and School of Mechatronics Engineering, Harbin Institute of Technology, Harbin 150001, P.R. China
| | - Yunlu Pan
- Key Laboratory of Micro-Systems and Micro-Structures Manufacturing, Ministry of Education and School of Mechatronics Engineering, Harbin Institute of Technology, Harbin 150001, P.R. China
| | - Danish Hussain
- State Key Laboratory of Robotics and Systems and School of Mechatronics Engineering, Harbin Institute of Technology, Harbin 150001, P.R. China
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The coupling of surface charge and boundary slip at the solid-liquid interface and their combined effect on fluid drag: A review. J Colloid Interface Sci 2015; 454:152-79. [PMID: 26021432 DOI: 10.1016/j.jcis.2015.05.015] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2015] [Accepted: 05/07/2015] [Indexed: 11/23/2022]
Abstract
Fluid drag of micro/nano fluidic systems has inspired wide scientific interest. Surface charge and boundary slip at the solid-liquid interface are believed to affect fluid drag. This review summarizes the recent studies on the coupling of surface charge and slip, and their combined effect on fluid drag at micro/nano scale. The effect of pH on surface charge of borosilicate glass and silica surfaces in deionized (DI) water and saline solution is discussed using a method based on colloidal probe atomic force microscopy (AFM). The boundary slip of various oil-solid interfaces are discussed for samples with different degrees of oleophobicity prepared by nanoparticle-binder system. By changing the pH of solution or applying an electric field, effect of surface charge on slip of a smooth hydrophobic octadecyltrichlorosilane (OTS) in DI water and saline solution is studied. A theoretical model incorporating the coupling relationship between surface charge and slip is used to discuss the combined effect of surface charge-induced electric double layer (EDL) and slip on fluid drag of pressure-driven flow in a one-dimensional parallel-plates microchannel. A theoretical method is used to reduce the fluid drag. The studies show that the increasing magnitude of surface charge density leads to a decrease in slip length. The surface charge results in a larger fluid drag, and the coupling of surface charge and slip can further increase the fluid drag. Surface charge-induced EDLs with asymmetric zeta potentials can effectively reduce the fluid drag.
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