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dc.contributor.author Wu, Dong en_US
dc.date.accessioned 2011-06-21T17:26:57Z
dc.date.available 2011-06-21T17:26:57Z
dc.date.issued 2010 en_US
dc.identifier.citation Liu,Xiaomeng;Wu,Dong;Turgman-Cohen,Salomon;Genzer,Jan;Theyson,Thomas W.;Rojas,Orlando J.. 2010. Adsorption of a Nonionic Symmetric Triblock Copolymer on Surfaces with Different Hydrophobicity. Langmuir 26(12): 9565-9574. en_US
dc.identifier.issn 0743-7463 en_US
dc.identifier.uri http://hdl.handle.net/10161/4082
dc.description.abstract This study investigates the adsorption of a symmetric triblock nonionic polymer comprising ethylene oxide (EO) and propylene oxide (PO) blocks (Pluronic P-105, EO37PO56EO37) on a range of substrates including hydrophobic, i.e., polypropylene (PP), poly(ethylene terephthalate) (PET), nylon, and graphite, and hydrophilic, i.e., cellulose and silica. The adsorption process and the structure of the hydrated adsorbed layers are followed by quartz crystal microgravimetry (QCM), surface plasmon resonance (SPR), and atomic force microscopy. The unhydrated surfaces are characterized by ellipsometry and contact angle techniques. The adsorption kinetics and the extent of adsorption are determined by monitoring the changes in resonance frequency and refractive index of sensors coated with ultrathin films of the various substrates. Langmuirian-type adsorption kinetics is observed in all cases studied. The amount of adsorbed Pluronic on hydrophobic polymer surfaces (PP, PET, and nylon) exceeds that on the hydrophilic cellulose. The hydrophobic (graphite) mineral surface adsorbs relatively low polymer mass, typical of a monolayer, while micellar structures are observed on the hydrophilic silica surface. The amount of water coupled to the adsorbed polymer layers is quantified by combining data from QCM, and SPR are found to increase with increasing polarity of the substrate. On the basis of contact angle data, the nonhydrated adsorbed structures produce modest increases in hydrophilicity of all the substrates investigated. Overall, insights are provided into the structure and stability of both hydrated and nonhydrated adsorbed triblock copolymer. en_US
dc.language.iso en_US en_US
dc.publisher AMER CHEMICAL SOC en_US
dc.relation.isversionof doi:10.1021/la100156a en_US
dc.subject quartz-crystal microbalance en_US
dc.subject plasmon resonance en_US
dc.subject block-copolymers en_US
dc.subject coupled water en_US
dc.subject cross-linking en_US
dc.subject kinetics en_US
dc.subject micellization en_US
dc.subject polyethers en_US
dc.subject desorption en_US
dc.subject ibuprofen en_US
dc.subject chemistry, multidisciplinary en_US
dc.subject chemistry, physical en_US
dc.subject materials science, multidisciplinary en_US
dc.title Adsorption of a Nonionic Symmetric Triblock Copolymer on Surfaces with Different Hydrophobicity en_US
dc.title.alternative en_US
dc.description.version Version of Record en_US
duke.date.pubdate 2010-6-15 en_US
duke.description.endpage 9574 en_US
duke.description.issue 12 en_US
duke.description.startpage 9565 en_US
duke.description.volume 26 en_US
dc.relation.journal Langmuir en_US

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