Oil detachment from silica surface modified by carboxy groups inaqueous cetyltriethylammonium bromide solution

Xiaofang Li, Qingzhong Xue, Tiantian Wu, Yakang Jin, Cuicui Ling, Shuangfang Lu

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Using molecular dynamics simulations, we investigated the process of oil detachment from silica surfacemodified by carboxy groups in aqueous surfactant (cetyltriethylammonium bromide (CTAB)) solution.It is demonstrated that CTAB molecules promote the formation of water channel between oil moleculesand silica surface, which is vital to the detachment of oil drop from silica surface. In this paper, theeffects of temperature, surfactant concentration, and calcium ion concentration on the oil detachmentfrom silica surface have been extensively examined. We find that appropriate temperature, surfactantconcentration, and calcium ion concentration are crucial for improving oil detachment efficiency. Ourstudy can provide a simple method to design and choose appropriate oil-displacing agents, which isimportant for its applications in oil recovery, ore floatation, detergency, printing fields, and so on.© 2015 Elsevier B.V. All rights reserved.
Original languageEnglish
JournalApplied Surface Science
Volume353
Pages (from-to)1103–1111
ISSN0169-4332
DOIs
Publication statusPublished - 2015
Externally publishedYes

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