Effects of Hofmeister Anions on the Aggregation Behavior of PEO–PPO–PEO Triblock Copolymers
The effects of a series of Hofmeister anions on the phase behaviors of a poly(ethylene oxide)-b-poly(propylene oxide)-b-poly(ethylene oxide) (PEO–PPO–PEO) triblock copolymer were investigated with an automated melting point system. Well hydrated anions and poorly hydrated anions interacted with the...
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| Veröffentlicht in: | Langmuir 2011-08, Vol.27 (15), p.9203-9210 |
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| creator | Deyerle, Branden A Zhang, Yanjie |
| description | The effects of a series of Hofmeister anions on the phase behaviors of a poly(ethylene oxide)-b-poly(propylene oxide)-b-poly(ethylene oxide) (PEO–PPO–PEO) triblock copolymer were investigated with an automated melting point system. Well hydrated anions and poorly hydrated anions interacted with the polymer differently and further affected the phase transition of the polymer. Poorly hydrated anions worked through changing the interfacial tension at the polymer/aqueous interface and in enhancing the polymer hydration by ion binding. The phase transition of the polymer in the presence of well hydrated anions correlated directly to the hydration entropy of the anions. As a consequence, the polymer showed a two-step phase transition in solutions containing poorly hydrated anions while displayed a single-step phase transition in the presence of well hydrated anions. The mechanisms of how ions interact with the polymer and further modulate its phase behaviors were discussed. |
| doi_str_mv | 10.1021/la201463g |
| format | Article |
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Well hydrated anions and poorly hydrated anions interacted with the polymer differently and further affected the phase transition of the polymer. Poorly hydrated anions worked through changing the interfacial tension at the polymer/aqueous interface and in enhancing the polymer hydration by ion binding. The phase transition of the polymer in the presence of well hydrated anions correlated directly to the hydration entropy of the anions. As a consequence, the polymer showed a two-step phase transition in solutions containing poorly hydrated anions while displayed a single-step phase transition in the presence of well hydrated anions. 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The mechanisms of how ions interact with the polymer and further modulate its phase behaviors were discussed.</description><subject>Anions - chemistry</subject><subject>Chemistry</subject><subject>Colloids: Surfactants and Self-Assembly, Dispersions, Emulsions, Foams</subject><subject>Exact sciences and technology</subject><subject>General and physical chemistry</subject><subject>Models, Molecular</subject><subject>Molecular Structure</subject><subject>Polyethylene Glycols - chemistry</subject><subject>Propylene Glycols - chemistry</subject><subject>Surface physical chemistry</subject><subject>Surface Properties</subject><subject>Transition Temperature</subject><issn>0743-7463</issn><issn>1520-5827</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2011</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNptkMFOwkAQhjdGI4gefAHTizEeqrvbbbsckaCYkMABz810mYVi28XdYsLNd_ANfRIXQbl4mJlk5pt_Jj8hl4zeMcrZfQmcMpFE8yPSZjGnYSx5ekzaNBVRmPpBi5w5t6SUdiPRPSUtzhIpJeu2STbQGlXjAqODodEVFq5BG_TqwtS-WQfNAoPefG5xDo3vBQ-4gPfC2O3CZDD--vicTH7yYBxMbZGXRr0GfbMy5aZC687JiYbS4cW-dsjL42DaH4aj8dNzvzcKQTDahFyynILECBkF4JDCLBaUsZlOcvChmY5RJDHGUc64pIkGFcmUilyBTmMVdcjNTndlzdsaXZNVhVNYllCjWbtMpl0hI8kTT97uSGWNcxZ1trJFBXaTMZpt7cz-7PTs1V51nVc4-yN__fPA9R4Ap6DUFmpVuAMn_JMiTQ4cKJctzdrW3ox_Dn4DcyOKJw</recordid><startdate>20110802</startdate><enddate>20110802</enddate><creator>Deyerle, Branden A</creator><creator>Zhang, Yanjie</creator><general>American Chemical Society</general><scope>IQODW</scope><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope></search><sort><creationdate>20110802</creationdate><title>Effects of Hofmeister Anions on the Aggregation Behavior of PEO–PPO–PEO Triblock Copolymers</title><author>Deyerle, Branden A ; Zhang, Yanjie</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a410t-281b0a8e3e10aa2a7ad54011df6baf6bf1f5e465e53b12806fac38704bcaf75c3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2011</creationdate><topic>Anions - chemistry</topic><topic>Chemistry</topic><topic>Colloids: Surfactants and Self-Assembly, Dispersions, Emulsions, Foams</topic><topic>Exact sciences and technology</topic><topic>General and physical chemistry</topic><topic>Models, Molecular</topic><topic>Molecular Structure</topic><topic>Polyethylene Glycols - chemistry</topic><topic>Propylene Glycols - chemistry</topic><topic>Surface physical chemistry</topic><topic>Surface Properties</topic><topic>Transition Temperature</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Deyerle, Branden A</creatorcontrib><creatorcontrib>Zhang, Yanjie</creatorcontrib><collection>Pascal-Francis</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><jtitle>Langmuir</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Deyerle, Branden A</au><au>Zhang, Yanjie</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Effects of Hofmeister Anions on the Aggregation Behavior of PEO–PPO–PEO Triblock Copolymers</atitle><jtitle>Langmuir</jtitle><addtitle>Langmuir</addtitle><date>2011-08-02</date><risdate>2011</risdate><volume>27</volume><issue>15</issue><spage>9203</spage><epage>9210</epage><pages>9203-9210</pages><issn>0743-7463</issn><eissn>1520-5827</eissn><coden>LANGD5</coden><abstract>The effects of a series of Hofmeister anions on the phase behaviors of a poly(ethylene oxide)-b-poly(propylene oxide)-b-poly(ethylene oxide) (PEO–PPO–PEO) triblock copolymer were investigated with an automated melting point system. 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| ispartof | Langmuir, 2011-08, Vol.27 (15), p.9203-9210 |
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| language | eng |
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| source | MEDLINE; ACS Publications |
| subjects | Anions - chemistry Chemistry Colloids: Surfactants and Self-Assembly, Dispersions, Emulsions, Foams Exact sciences and technology General and physical chemistry Models, Molecular Molecular Structure Polyethylene Glycols - chemistry Propylene Glycols - chemistry Surface physical chemistry Surface Properties Transition Temperature |
| title | Effects of Hofmeister Anions on the Aggregation Behavior of PEO–PPO–PEO Triblock Copolymers |
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