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The anisotropic characteristics of natural fibrous sepiolite as revealed by contact angle, surface free energy, AFM and molecular dynamics simulation
Alternative TitleColloid Surf. A-Physicochem. Eng. Asp.
Benli, Birgul1; Du, Hao2; Celik, Mehmet Sabri1
2012-08-20
Source PublicationCOLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
ISSN0927-7757
Volume408Issue:AugustPages:22-31
AbstractIn this study, the anisotropic character of natural sepiolite was revealed by a combination of techniques involving contact angle measurements, Atomic Force Microscopy (AFM), and molecular dynamics (MD) simulations. Capillary rise technique was used to determine the change in contact angle values for several wetting liquids and calculate the surface free energy and acid/base components of sepiolite. The surface heterogeneity of sepiolite for a single fiber surface corresponding to roughness parameters was calculated from the AFM images. Finally, the interactions between water molecules and sepiolite mineral surfaces were also computationally analyzed using MD simulation to understand the interfacial water structure and the configuration of water molecules at the basal surface of sepiolite. It was found that due to the absence of hydrogen bonding sites, the hydrophobic sepiolite basal plane is not in close contact with water molecules, thus leaving a 3 angstrom void space at the basal plane. (c) 2012 Elsevier B.V. All rights reserved.; In this study, the anisotropic character of natural sepiolite was revealed by a combination of techniques involving contact angle measurements, Atomic Force Microscopy (AFM), and molecular dynamics (MD) simulations. Capillary rise technique was used to determine the change in contact angle values for several wetting liquids and calculate the surface free energy and acid/base components of sepiolite. The surface heterogeneity of sepiolite for a single fiber surface corresponding to roughness parameters was calculated from the AFM images. Finally, the interactions between water molecules and sepiolite mineral surfaces were also computationally analyzed using MD simulation to understand the interfacial water structure and the configuration of water molecules at the basal surface of sepiolite. It was found that due to the absence of hydrogen bonding sites, the hydrophobic sepiolite basal plane is not in close contact with water molecules, thus leaving a 3 angstrom void space at the basal plane. (c) 2012 Elsevier B.V. All rights reserved.
KeywordSepiolite Capillary Rise Contact Angle Surface Energy Components Molecular Dynamics Simulation
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1016/j.colsurfa.2012.04.018
URL查看原文
Indexed BySCI
Language英语
WOS KeywordATOMIC-FORCE MICROSCOPY ; THIN-LAYER WICKING ; CRYSTAL-STRUCTURES ; WATER-STRUCTURE ; CLAY-MINERALS ; THERMODYNAMIC PROPERTIES ; AQUEOUS-SOLUTIONS ; LIQUID WATER ; TALC ; SYSTEMS
WOS Research AreaChemistry
WOS SubjectChemistry, Physical
WOS IDWOS:000313407200004
Citation statistics
Cited Times:28[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/11340
Collection研究所(批量导入)
Affiliation1.Istanbul Tech Univ, Dept Mineral Proc Engn, TR-34469 Istanbul, Turkey
2.Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Benli, Birgul,Du, Hao,Celik, Mehmet Sabri. The anisotropic characteristics of natural fibrous sepiolite as revealed by contact angle, surface free energy, AFM and molecular dynamics simulation[J]. COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS,2012,408(August):22-31.
APA Benli, Birgul,Du, Hao,&Celik, Mehmet Sabri.(2012).The anisotropic characteristics of natural fibrous sepiolite as revealed by contact angle, surface free energy, AFM and molecular dynamics simulation.COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS,408(August),22-31.
MLA Benli, Birgul,et al."The anisotropic characteristics of natural fibrous sepiolite as revealed by contact angle, surface free energy, AFM and molecular dynamics simulation".COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS 408.August(2012):22-31.
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