Adsorption and Desorption Behavior of Asphaltene on Polymer-Brush-Immobilized Surfaces

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• 作者：Yuji Higaki ; Kaoru Hatae ; Tatsuya Ishikawa ; Toshimasa Takanohashi ; Jun-ichiro Hayashi ; Atsushi Takahara
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2014
• 出版时间：November 26, 2014
• 年：2014
• 卷：6
• 期：22
• 页码：20385-20389
• 全文大小：217K
• ISSN：1944-8252

文摘

The adsorption behavior of a model compound for surface-active component of asphaltenes, N-(1-hexylheptyl)-N鈥?(12-carboxylicdodecyl) perylene-3,4,9,10-tetracarboxylic bisimide (C5Pe), and detachment behavior of asphaltene deposit films for high-density polymer brushes were investigated. Zwitterionic poly(3-(N-2-methacryloyloxyethyl-N,N-dimethyl)ammonatopropanesulfonate (PMAPS) brushes and hydrophobic poly(n-hexyl methacrylate) (PHMA) brushes exhibit less C5Pe adsorption than poly(methyl methacrylate) (PMMA). The asphaltene deposit films on the PHMA brush detached in a model oil (toluene/n-heptane = 1/4 (v/v)), and the asphaltene films on the PMAPS brush detached in water. The antifouling character was explained by the interface free energy for the polymer-brush/asphaltenes (纬_SA) and polymer-brush/toluene (纬_SO).

Keywords:

polymer brush; asphaltene; adsorption; antifouling; surface-initiated atom transfer radical polymerization; interface free energy