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231225s2022 xx |||||o 00| ||eng c |
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|a 10.1021/acs.langmuir.1c02908
|2 doi
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|a eng
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|a Li, Hanglin
|e verfasserin
|4 aut
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|a Study on the Liquid-Liquid and Liquid-Solid Interfacial Behavior of Functionalized Graphene Oxide
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|c 2022
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|a Text
|b txt
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|a ƒaComputermedien
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|a ƒa Online-Ressource
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|a Date Revised 11.01.2022
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a With the rise of carbon neutrality, the applications of carbon-based materials are gaining considerable attention. Graphene oxide (GO) is a two-dimensional sheet with epoxy and hydroxyl groups on the basal plane and carboxyl groups at the edge. In order to change the oil/water (o/w) interfacial activity, GO was controlled and modified by dodecylamine to get two kinds of functionalized GOs (fGOs), named as basal plane-functionalized GO (bGO) and edge-functionalized GO (eGO), respectively. The interfacial tension measurement showed that fGOs could reduce more interfacial tension at the poly-α-olefin/water interface than those at synthetic esters or aromatic compounds/water interfaces. Besides, eGO can reduce more poly-α-olefin-4/water interfacial tension compared to bGO. The interfacial dilatational rheology of eGO and fatty alcohol polyoxyethylene ether-4 (MOA4) showed that MOA4 gradually replaced eGO at the interface with the increase of MOA4, until the interface was completely occupied. eGO and MOA4 complex emulsion exhibited the best friction-reducing performance at 250 rpm. The coefficient of friction (COF) curves of the emulsions with eGO showed two platforms, with the COF reduced by 37.42% at the most. The rheological results of emulsions showed that the addition of eGO increased the elasticity of the emulsion. Emulsions showed shear-thinning and friction-thickening properties, which make it easier for the emulsion to form a lubricating film on the metal surface. Our research results suggested that the functionalization on the edge of GO will change the interfacial properties significantly, which have widespread applications in the encapsulation of active materials, surface protection, adsorption, and separation of pollutants
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|a Journal Article
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|a Shang, Yazhuo
|e verfasserin
|4 aut
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|a Zeng, Xiangqiong
|e verfasserin
|4 aut
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| 700 |
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|a Liu, Honglai
|e verfasserin
|4 aut
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| 700 |
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|a Li, Jiusheng
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1992
|g 38(2022), 1 vom: 11. Jan., Seite 482-494
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|x 1520-5827
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| 773 |
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|g volume:38
|g year:2022
|g number:1
|g day:11
|g month:01
|g pages:482-494
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|u http://dx.doi.org/10.1021/acs.langmuir.1c02908
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