title: Adsorption and desorption behavior of asphaltene on polymer-brush-immobilized surfaces.
abstract: The adsorption behavior of a model compound for surface-active component of asphaltenes, N-(1-hexylheptyl)-N'-(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 (γSA) and polymer-brush/toluene (γSO).
authors.affiliation: Graduate School of Engineering, ‡Institute for Materials Chemistry and Engineering, and ∥International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University , 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan.
authors.forename: Yuji
authors.initials: Y
authors.lastname: Higaki
authors.forename: Kaoru
authors.initials: K
authors.lastname: Hatae
authors.forename: Tatsuya
authors.initials: T
authors.lastname: Ishikawa
authors.forename: Toshimasa
authors.initials: T
authors.lastname: Takanohashi
authors.forename: Jun-ichiro
authors.initials: J
authors.lastname: Hayashi
authors.forename: Atsushi
authors.initials: A
authors.lastname: Takahara
keywords: adsorption; antifouling; asphaltene; interface free energy; polymer brush; surface-initiated atom transfer radical polymerization