CAS OpenIR
Surface Wetting-Driven Separation of Surfactant-Stabilized Water-Oil Emulsions
Zhang, Qian1,2; Li, Lei1; Li, Yanxiang1; Cao, Lixia1; Yang, Chuanfang1
2018-05-15
Source PublicationLANGMUIR
ISSN0743-7463
Volume34Issue:19Pages:5505-5516
AbstractFour fluorocarbon polymers including polytetrafluoroethylene and polyvinylidene fluoride were coated on a stainless steel felt to separate emulsified water droplets from ultralow sulfur diesel (ULSD) fuels. The original fuel treated with clay to remove additives was additized again with four known surfactants including pentaerythrityoleate, (octadecadienoic acid) dipolymer, (octadecadienoic acid) tripolymer, and monoolein individually. The different surfactants adsorbed on the fuel water interface reduce the interfacial intension with different intensities. The separation efficiency at various surfactant concentrations was used to evaluate the coalescence effect exerted by these coatings. It was found the separation was both surfactant- and coating-dependent. A fluoro-polyurethane coating (FC1) stood out to counteract the adverse effect of all the surfactants. Solid free energy was then measured using acid base and Kaelble-Uy adhesion theories for all the coatings, but its correlation with coalescence was not found at all. Coating aging in surfactant-additized fuel on the coating's water wettability was also examined to better understand how historical wetting affects separation. A tumbled model for fluorocarbons was identified that well-explained the continuous decline of the water contact angle on the FC1 coating in fuel. Subject to the challenge of the foreign environment, the fluoroalkyl chains of the polymer tilt to expose the carbonyl groups underneath, resulting in favored coalescence separation in the presence of surfactants.
DOI10.1021/acs.langmuir.7b04248
Language英语
WOS KeywordMOLECULAR AGGREGATION STRUCTURE ; ACRYLATE) THIN-FILMS ; GLASS-FIBER MEDIA ; FREE-ENERGY ; COALESCENCE ; WETTABILITY ; INTERFACE
Funding ProjectNational Natural Science Foundation of China[21476237] ; National Key Research and Development Program of China[2017YFB0308002]
WOS Research AreaChemistry ; Materials Science
WOS SubjectChemistry, Multidisciplinary ; Chemistry, Physical ; Materials Science, Multidisciplinary
Funding OrganizationNational Natural Science Foundation of China ; National Key Research and Development Program of China
WOS IDWOS:000432417700018
PublisherAMER CHEMICAL SOC
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/24643
Collection中国科学院过程工程研究所
Corresponding AuthorYang, Chuanfang
Affiliation1.Chinese Acad Sci, Inst Proc Engn, CAS Key Lab Green Proc & Engn, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Zhang, Qian,Li, Lei,Li, Yanxiang,et al. Surface Wetting-Driven Separation of Surfactant-Stabilized Water-Oil Emulsions[J]. LANGMUIR,2018,34(19):5505-5516.
APA Zhang, Qian,Li, Lei,Li, Yanxiang,Cao, Lixia,&Yang, Chuanfang.(2018).Surface Wetting-Driven Separation of Surfactant-Stabilized Water-Oil Emulsions.LANGMUIR,34(19),5505-5516.
MLA Zhang, Qian,et al."Surface Wetting-Driven Separation of Surfactant-Stabilized Water-Oil Emulsions".LANGMUIR 34.19(2018):5505-5516.
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