Mesoscopic Simulations of the Phase Behavior of Aqueous EO 19 PO 29 EO 19 Solutions Confined and Sheared by Hydrophobic and Hydrophilic Surfaces

Handle URI:
http://hdl.handle.net/10754/600231
Title:
Mesoscopic Simulations of the Phase Behavior of Aqueous EO 19 PO 29 EO 19 Solutions Confined and Sheared by Hydrophobic and Hydrophilic Surfaces
Authors:
Liu, Hongyi; Li, Yan; Krause, Wendy E.; Pasquinelli, Melissa A.; Rojas, Orlando J.
Abstract:
The MesoDyn method is used to investigate associative structures in aqueous solution of a nonionic triblock copolymer consisting of poly(propylene oxide) capped on both ends with poly(ethylene oxide) chains. The effect of adsorbing (hydrophobic) and nonadsorbing (hydrophilic) solid surfaces in contact with aqueous solutions of the polymer is elucidated. The macromolecules form self-assembled structures in solution. Confinement under shear forces is investigated in terms of interfacial behavior and association. The formation of micelles under confinement between hydrophilic surfaces occurs faster than in bulk aqueous solution while layered structures assemble when the polymers are confined between hydrophobic surfaces. Micelles are deformed under shear rates of 1 μs -1 and eventually break to form persistent, adsorbed layered structures. As a result, surface damage under frictional forces is prevented. Overall, this study indicates that aqueous triblock copolymers of poly(ethylene oxide) (PEO) and poly(propylene oxide) (PPO) (Pluronics, EO mPO nEO m) act as a boundary lubricant for hydrophobic surfaces but not for hydrophilic ones. © 2011 American Chemical Society.
Citation:
Liu H, Li Y, Krause WE, Pasquinelli MA, Rojas OJ (2012) Mesoscopic Simulations of the Phase Behavior of Aqueous EO 19 PO 29 EO 19 Solutions Confined and Sheared by Hydrophobic and Hydrophilic Surfaces . ACS Applied Materials & Interfaces 4: 87–95. Available: http://dx.doi.org/10.1021/am200917h.
Publisher:
American Chemical Society (ACS)
Journal:
ACS Applied Materials & Interfaces
Issue Date:
25-Jan-2012
DOI:
10.1021/am200917h
PubMed ID:
22136187
Type:
Article
ISSN:
1944-8244; 1944-8252
Sponsors:
This work was partially supported by the National Textile Center under Grant C05-NS09. We thank Dr. Juan Hinestroza at Cornell University for helpful discussions.
Appears in Collections:
Publications Acknowledging KAUST Support

Full metadata record

DC FieldValue Language
dc.contributor.authorLiu, Hongyien
dc.contributor.authorLi, Yanen
dc.contributor.authorKrause, Wendy E.en
dc.contributor.authorPasquinelli, Melissa A.en
dc.contributor.authorRojas, Orlando J.en
dc.date.accessioned2016-02-28T07:59:35Zen
dc.date.available2016-02-28T07:59:35Zen
dc.date.issued2012-01-25en
dc.identifier.citationLiu H, Li Y, Krause WE, Pasquinelli MA, Rojas OJ (2012) Mesoscopic Simulations of the Phase Behavior of Aqueous EO 19 PO 29 EO 19 Solutions Confined and Sheared by Hydrophobic and Hydrophilic Surfaces . ACS Applied Materials & Interfaces 4: 87–95. Available: http://dx.doi.org/10.1021/am200917h.en
dc.identifier.issn1944-8244en
dc.identifier.issn1944-8252en
dc.identifier.pmid22136187en
dc.identifier.doi10.1021/am200917hen
dc.identifier.urihttp://hdl.handle.net/10754/600231en
dc.description.abstractThe MesoDyn method is used to investigate associative structures in aqueous solution of a nonionic triblock copolymer consisting of poly(propylene oxide) capped on both ends with poly(ethylene oxide) chains. The effect of adsorbing (hydrophobic) and nonadsorbing (hydrophilic) solid surfaces in contact with aqueous solutions of the polymer is elucidated. The macromolecules form self-assembled structures in solution. Confinement under shear forces is investigated in terms of interfacial behavior and association. The formation of micelles under confinement between hydrophilic surfaces occurs faster than in bulk aqueous solution while layered structures assemble when the polymers are confined between hydrophobic surfaces. Micelles are deformed under shear rates of 1 μs -1 and eventually break to form persistent, adsorbed layered structures. As a result, surface damage under frictional forces is prevented. Overall, this study indicates that aqueous triblock copolymers of poly(ethylene oxide) (PEO) and poly(propylene oxide) (PPO) (Pluronics, EO mPO nEO m) act as a boundary lubricant for hydrophobic surfaces but not for hydrophilic ones. © 2011 American Chemical Society.en
dc.description.sponsorshipThis work was partially supported by the National Textile Center under Grant C05-NS09. We thank Dr. Juan Hinestroza at Cornell University for helpful discussions.en
dc.publisherAmerican Chemical Society (ACS)en
dc.subjectboundary layeren
dc.subjectcylindrical micellesen
dc.subjectlubricationen
dc.subjectMesoDynen
dc.subjectpluronicsen
dc.subjectspherical micellesen
dc.subjecttriblock nonionic polymersen
dc.subjectwormlike micellesen
dc.titleMesoscopic Simulations of the Phase Behavior of Aqueous EO 19 PO 29 EO 19 Solutions Confined and Sheared by Hydrophobic and Hydrophilic Surfacesen
dc.typeArticleen
dc.identifier.journalACS Applied Materials & Interfacesen
dc.contributor.institutionFiber and Polymer Science Program, Department of Textile Engineering, Chemistry and Science, North Carolina State University, Raleigh, NC 27695, United Statesen
dc.contributor.institutionDepartment of Forest Biomaterials, North Carolina State University, Raleigh, NC 27695, United Statesen
dc.contributor.institutionDepartment of Earth and Atmospheric Sciences, Cornell University, Ithaca, NY 14853, United Statesen
dc.contributor.institutionSchool of Chemical Technology, Department of Forest Products Technology, Aalto University, FI-00076 Aalto, Espoo, Finlanden
kaust.authorLi, Yanen
kaust.grant.fundedcenterKAUST-Cornell Center for Energy and Sustainabilityen
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