Study of Factors Governing Oil-Water Separation Process Using TiO2 Films Prepared by Spray Deposition of Nanoparticle Dispersions

被引:222
作者
Gondal, Mohammed A. [1 ,2 ]
Sadullah, Muhammad S. [1 ,2 ]
Dastageer, Mohamed A. [1 ,2 ]
McKinley, Gareth H. [3 ]
Panchanathan, Divya [3 ]
Varanasi, Kripa K. [3 ]
机构
[1] King Fahd Univ Petr & Minerals, Laser Res Grp, Dept Phys, Dhahran 31261, Saudi Arabia
[2] King Fahd Univ Petr & Minerals, Ctr Excellence Nanotechnol CENT, Dhahran 31261, Saudi Arabia
[3] MIT, Dept Mech Engn, Cambridge, MA 02139 USA
关键词
oil-water separation; superhydrophihcity; underwater superoleophobicity; textured surface; titania; UNDERWATER SUPEROLEOPHOBICITY; CONTACT-ANGLE; COATED MESH; SURFACES; WETTABILITY; SUPERHYDROPHILICITY; MEMBRANES; BRIDGES;
D O I
10.1021/am501867b
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Surfaces which possess extraordinary water attraction or repellency depend on surface energy, surface chemistry, and nano- and microscale surface roughness. Synergistic superhydrophilic-underwater superoleophobic surfaces were fabricated by spray deposition of nanostructured TiO2 on stainless steel mesh substrates. The coated meshes were then used to study gravity driven oil water separation, where only the water from the oil water mixture is allowed to permeate through the mesh. Oil water separation efficiencies of up to 99% could be achieved through the coated mesh of pore sizes SO and 100 pm, compared to no separation at all, that was observed in the case of uncoated meshes of the same material and pore sizes. An adsorbed water on the TiO2 coated surface, formation of a water-film between the wires that form the mesh and the underwater superoleophobicity of the structured surface are the key factors that contribute to the enhanced efficiency observed in oil water separation. The nature of the oil water separation process using this coated mesh (in which the mesh allows water to pass through the porous structure but resists wetting by the oil phase) minimizes the fouling of mesh so that the need for frequent replacement of the separating medium is reduced. The fabrication approach presented here can be applied for coating large surface areas and to develop a large-scale oil water separation facility for oil-field applications and petroleum industries.
引用
收藏
页码:13422 / 13429
页数:8
相关论文
共 44 条
[11]  
Fingas M, 2011, OIL SPILL SCIENCE AND TECHNOLOGY: PREVENTION, RESPONSE, AND CLEANUP, P1
[12]  
Gondal MA, 2013, 2013 10TH INTERNATIONAL CONFERENCE ON HIGH CAPACITY OPTICAL NETWORKS AND ENABLING TECHNOLOGIES (HONET-CNS), P151, DOI 10.1109/HONET.2013.6729775
[13]   LIQUID BRIDGES AND THE OIL AGGLOMERATION METHOD OF COAL BENEFICIATION - AN ELEMENTARY THEORY OF STABILITY [J].
GOOD, RJ ;
ISLAM, M .
LANGMUIR, 1991, 7 (12) :3219-3221
[14]   CONTACT-ANGLE, WETTING, AND ADHESION - A CRITICAL-REVIEW [J].
GOOD, RJ .
JOURNAL OF ADHESION SCIENCE AND TECHNOLOGY, 1992, 6 (12) :1269-1302
[15]   Correlation of Oil-Water and Air-Water Contact Angles of Diverse Silanized Surfaces and Relationship to Fluid Interfacial Tensions [J].
Grate, Jay W. ;
Dehoff, Karl J. ;
Warner, Marvin G. ;
Pittman, Jonathan W. ;
Wietsma, Thomas W. ;
Zhang, Changyong ;
Oostrom, Mart .
LANGMUIR, 2012, 28 (18) :7182-7188
[16]   Influence of membrane material and corrugation and process conditions on emulsion microfiltration [J].
Hu, B. ;
Scott, K. .
JOURNAL OF MEMBRANE SCIENCE, 2007, 294 (1-2) :30-39
[17]   Contact angle measurements on superhydrophobic carbon nanotube forests: Effect of fluid pressure [J].
Journet, C ;
Moulinet, S ;
Ybert, C ;
Purcell, ST ;
Bocquet, L .
EUROPHYSICS LETTERS, 2005, 71 (01) :104-109
[18]   Wetting Behavior of Water and Oil Droplets in Three-Phase Interfaces for Hydrophobicity/philicity and Oleophobicity/philicity [J].
Jung, Yong Chae ;
Bhushan, Bharat .
LANGMUIR, 2009, 25 (24) :14165-14173
[19]   REPELLENCY OF TEXTILE ASSEMBLIES .1. APPARENT CONTACT-ANGLE OF WAX-COATED MONOFILAMENT MESH SCREEN [J].
KAWASE, T ;
FUJII, T ;
MINAGAWA, M .
TEXTILE RESEARCH JOURNAL, 1987, 57 (04) :185-191
[20]   Hygro-responsive membranes for effective oil-water separation [J].
Kota, Arun K. ;
Kwon, Gibum ;
Choi, Wonjae ;
Mabry, Joseph M. ;
Tuteja, Anish .
NATURE COMMUNICATIONS, 2012, 3