Particle self-assembly in oil-in-ionic liquid Pickering emulsions
Laser scanning confocal images illustrating the formation of heterogeneous particle bridges at oil–ionic liquid Pickering emulsion interfaces. The particle mixtures are (a) amine-treated polystyrene/sulfate-treated polystyrene and (b) carboxylate-treated polystyrene/sulfate-treated polystyrene, resp...
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| Veröffentlicht in: | Journal of colloid and interface science 2011-11, Vol.363 (1), p.307-313 |
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| creator | Walker, Elizabeth M. Frost, Denzil S. Dai, Lenore L. |
| description | Laser scanning confocal images illustrating the formation of heterogeneous particle bridges at oil–ionic liquid Pickering emulsion interfaces. The particle mixtures are (a) amine-treated polystyrene/sulfate-treated polystyrene and (b) carboxylate-treated polystyrene/sulfate-treated polystyrene, respectively. The particles are 1.1
μm in diameter.
[Display omitted] .
► Oil-in-ionic liquid (IL) Pickering emulsions were investigated. ► Solid particles with certain chemistry bridged the oil droplets but completely avoided oil–IL interfaces. ► The bridge formation surprisingly distressed overall emulation stability. ► Systems with binary solid particles exhibited similar, even enhanced, bridging phenomenon.
We have studied polydimethylsiloxane (PDMS)-in-1-butyl-3-methylimidazolium hexafluorophosphate ([BMIM][PF
6]) Pickering emulsions stabilized by polystyrene microparticles with different surface chemistry. Surprisingly, in contrast to the consensus originating from oil/water Pickering emulsions in which the solid particles equilibrate at the oil–water droplet interfaces and provide effective stabilization, here the polystyrene microparticles treated with sulfate, aldehyde sulfate, or carboxylate dissociable groups mostly formed monolayer bridges among the oil droplets rather than residing at the oil–ionic liquid interfaces. The bridge formation inhibited individual droplet–droplet coalescence; however, due to low density and large volume (thus the buoyant effect), the aggregated oil droplets actually promoted oil/ionic liquid phase separation and distressed emulsion stability. Systems with binary heterogeneous polystyrene microparticles exhibited similar, even enhanced (in terms of surface chemistry dependence), bridging phenomenon in the PDMS-in-[BMIM][PF
6] Pickering emulsions. |
| doi_str_mv | 10.1016/j.jcis.2011.07.056 |
| format | Article |
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μm in diameter.
[Display omitted] .
► Oil-in-ionic liquid (IL) Pickering emulsions were investigated. ► Solid particles with certain chemistry bridged the oil droplets but completely avoided oil–IL interfaces. ► The bridge formation surprisingly distressed overall emulation stability. ► Systems with binary solid particles exhibited similar, even enhanced, bridging phenomenon.
We have studied polydimethylsiloxane (PDMS)-in-1-butyl-3-methylimidazolium hexafluorophosphate ([BMIM][PF
6]) Pickering emulsions stabilized by polystyrene microparticles with different surface chemistry. Surprisingly, in contrast to the consensus originating from oil/water Pickering emulsions in which the solid particles equilibrate at the oil–water droplet interfaces and provide effective stabilization, here the polystyrene microparticles treated with sulfate, aldehyde sulfate, or carboxylate dissociable groups mostly formed monolayer bridges among the oil droplets rather than residing at the oil–ionic liquid interfaces. The bridge formation inhibited individual droplet–droplet coalescence; however, due to low density and large volume (thus the buoyant effect), the aggregated oil droplets actually promoted oil/ionic liquid phase separation and distressed emulsion stability. Systems with binary heterogeneous polystyrene microparticles exhibited similar, even enhanced (in terms of surface chemistry dependence), bridging phenomenon in the PDMS-in-[BMIM][PF
6] Pickering emulsions.</description><identifier>ISSN: 0021-9797</identifier><identifier>EISSN: 1095-7103</identifier><identifier>DOI: 10.1016/j.jcis.2011.07.056</identifier><identifier>PMID: 21840016</identifier><identifier>CODEN: JCISA5</identifier><language>eng</language><publisher>Amsterdam: Elsevier Inc</publisher><subject>Bridges (structures) ; Chemistry ; Colloidal state and disperse state ; Droplets ; Emulsion stability ; Emulsions ; Emulsions. Microemulsions. Foams ; Exact sciences and technology ; General and physical chemistry ; Ionic liquid ; ionic liquids ; Liquids ; Microparticle bridging ; Microparticles ; oils ; Particle assembly ; Physical and chemical studies. Granulometry. Electrokinetic phenomena ; Pickering emulsions ; Polystyrene resins ; polystyrenes ; Self assembly ; separation ; Sulfates ; Surface physical chemistry</subject><ispartof>Journal of colloid and interface science, 2011-11, Vol.363 (1), p.307-313</ispartof><rights>2011 Elsevier Inc.</rights><rights>2015 INIST-CNRS</rights><rights>Copyright © 2011 Elsevier Inc. All rights reserved.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c441t-d014df2e61edc39031fc84415ff7df63e331cdd1b64ba709f5affb4b34467cfd3</citedby><cites>FETCH-LOGICAL-c441t-d014df2e61edc39031fc84415ff7df63e331cdd1b64ba709f5affb4b34467cfd3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.jcis.2011.07.056$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,780,784,3548,27923,27924,45994</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=24578235$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/21840016$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Walker, Elizabeth M.</creatorcontrib><creatorcontrib>Frost, Denzil S.</creatorcontrib><creatorcontrib>Dai, Lenore L.</creatorcontrib><title>Particle self-assembly in oil-in-ionic liquid Pickering emulsions</title><title>Journal of colloid and interface science</title><addtitle>J Colloid Interface Sci</addtitle><description>Laser scanning confocal images illustrating the formation of heterogeneous particle bridges at oil–ionic liquid Pickering emulsion interfaces. The particle mixtures are (a) amine-treated polystyrene/sulfate-treated polystyrene and (b) carboxylate-treated polystyrene/sulfate-treated polystyrene, respectively. The particles are 1.1
μm in diameter.
[Display omitted] .
► Oil-in-ionic liquid (IL) Pickering emulsions were investigated. ► Solid particles with certain chemistry bridged the oil droplets but completely avoided oil–IL interfaces. ► The bridge formation surprisingly distressed overall emulation stability. ► Systems with binary solid particles exhibited similar, even enhanced, bridging phenomenon.
We have studied polydimethylsiloxane (PDMS)-in-1-butyl-3-methylimidazolium hexafluorophosphate ([BMIM][PF
6]) Pickering emulsions stabilized by polystyrene microparticles with different surface chemistry. Surprisingly, in contrast to the consensus originating from oil/water Pickering emulsions in which the solid particles equilibrate at the oil–water droplet interfaces and provide effective stabilization, here the polystyrene microparticles treated with sulfate, aldehyde sulfate, or carboxylate dissociable groups mostly formed monolayer bridges among the oil droplets rather than residing at the oil–ionic liquid interfaces. The bridge formation inhibited individual droplet–droplet coalescence; however, due to low density and large volume (thus the buoyant effect), the aggregated oil droplets actually promoted oil/ionic liquid phase separation and distressed emulsion stability. Systems with binary heterogeneous polystyrene microparticles exhibited similar, even enhanced (in terms of surface chemistry dependence), bridging phenomenon in the PDMS-in-[BMIM][PF
6] Pickering emulsions.</description><subject>Bridges (structures)</subject><subject>Chemistry</subject><subject>Colloidal state and disperse state</subject><subject>Droplets</subject><subject>Emulsion stability</subject><subject>Emulsions</subject><subject>Emulsions. Microemulsions. Foams</subject><subject>Exact sciences and technology</subject><subject>General and physical chemistry</subject><subject>Ionic liquid</subject><subject>ionic liquids</subject><subject>Liquids</subject><subject>Microparticle bridging</subject><subject>Microparticles</subject><subject>oils</subject><subject>Particle assembly</subject><subject>Physical and chemical studies. Granulometry. Electrokinetic phenomena</subject><subject>Pickering emulsions</subject><subject>Polystyrene resins</subject><subject>polystyrenes</subject><subject>Self assembly</subject><subject>separation</subject><subject>Sulfates</subject><subject>Surface physical chemistry</subject><issn>0021-9797</issn><issn>1095-7103</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2011</creationdate><recordtype>article</recordtype><recordid>eNqF0M1q3DAUBWBRWppJ2hfIIvGmZGX3yvqzoZsQ2rQQaKDNWsjSVdBEthNpXMjbV2amWaYrIe53j8Qh5JRCQ4HKz9tma0NuWqC0AdWAkG_IhkIvakWBvSUbgJbWverVETnOeQsFCtG_J0ct7Xi5yQ25vDVpF2zEKmP0tckZxyE-V2Gq5hDrMNVhnoKtYnhagqtug33AFKb7Cscl5jLLH8g7b2LGj4fzhNx9-_r76nt98_P6x9XlTW05p7vaAeXOtygpOst6YNTbrkyE98p5yZAxap2jg-SDUdB7Ybwf-MA4l8p6x07IxT73Mc1PC-adHkO2GKOZcF6y7ilIwduu-6_sOrFi1hbZ7qVNc84JvX5MYTTpWVPQa8d6q9eO9dqxBqVLx2Xp7BC_DCO6l5V_pRbw6QBMtib6ZKY148VxobqWieLO986bWZv7VMzdr_KSBADZ9cCL-LIXWIr9EzDpbANOFl1IaHfazeG1n_4F-tGjIg</recordid><startdate>20111101</startdate><enddate>20111101</enddate><creator>Walker, Elizabeth M.</creator><creator>Frost, Denzil S.</creator><creator>Dai, Lenore L.</creator><general>Elsevier Inc</general><general>Elsevier</general><scope>FBQ</scope><scope>IQODW</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope><scope>7U5</scope><scope>8FD</scope><scope>L7M</scope></search><sort><creationdate>20111101</creationdate><title>Particle self-assembly in oil-in-ionic liquid Pickering emulsions</title><author>Walker, Elizabeth M. ; Frost, Denzil S. ; Dai, Lenore L.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c441t-d014df2e61edc39031fc84415ff7df63e331cdd1b64ba709f5affb4b34467cfd3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2011</creationdate><topic>Bridges (structures)</topic><topic>Chemistry</topic><topic>Colloidal state and disperse state</topic><topic>Droplets</topic><topic>Emulsion stability</topic><topic>Emulsions</topic><topic>Emulsions. Microemulsions. Foams</topic><topic>Exact sciences and technology</topic><topic>General and physical chemistry</topic><topic>Ionic liquid</topic><topic>ionic liquids</topic><topic>Liquids</topic><topic>Microparticle bridging</topic><topic>Microparticles</topic><topic>oils</topic><topic>Particle assembly</topic><topic>Physical and chemical studies. Granulometry. Electrokinetic phenomena</topic><topic>Pickering emulsions</topic><topic>Polystyrene resins</topic><topic>polystyrenes</topic><topic>Self assembly</topic><topic>separation</topic><topic>Sulfates</topic><topic>Surface physical chemistry</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Walker, Elizabeth M.</creatorcontrib><creatorcontrib>Frost, Denzil S.</creatorcontrib><creatorcontrib>Dai, Lenore L.</creatorcontrib><collection>AGRIS</collection><collection>Pascal-Francis</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>Technology Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Journal of colloid and interface science</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Walker, Elizabeth M.</au><au>Frost, Denzil S.</au><au>Dai, Lenore L.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Particle self-assembly in oil-in-ionic liquid Pickering emulsions</atitle><jtitle>Journal of colloid and interface science</jtitle><addtitle>J Colloid Interface Sci</addtitle><date>2011-11-01</date><risdate>2011</risdate><volume>363</volume><issue>1</issue><spage>307</spage><epage>313</epage><pages>307-313</pages><issn>0021-9797</issn><eissn>1095-7103</eissn><coden>JCISA5</coden><abstract>Laser scanning confocal images illustrating the formation of heterogeneous particle bridges at oil–ionic liquid Pickering emulsion interfaces. The particle mixtures are (a) amine-treated polystyrene/sulfate-treated polystyrene and (b) carboxylate-treated polystyrene/sulfate-treated polystyrene, respectively. The particles are 1.1
μm in diameter.
[Display omitted] .
► Oil-in-ionic liquid (IL) Pickering emulsions were investigated. ► Solid particles with certain chemistry bridged the oil droplets but completely avoided oil–IL interfaces. ► The bridge formation surprisingly distressed overall emulation stability. ► Systems with binary solid particles exhibited similar, even enhanced, bridging phenomenon.
We have studied polydimethylsiloxane (PDMS)-in-1-butyl-3-methylimidazolium hexafluorophosphate ([BMIM][PF
6]) Pickering emulsions stabilized by polystyrene microparticles with different surface chemistry. Surprisingly, in contrast to the consensus originating from oil/water Pickering emulsions in which the solid particles equilibrate at the oil–water droplet interfaces and provide effective stabilization, here the polystyrene microparticles treated with sulfate, aldehyde sulfate, or carboxylate dissociable groups mostly formed monolayer bridges among the oil droplets rather than residing at the oil–ionic liquid interfaces. The bridge formation inhibited individual droplet–droplet coalescence; however, due to low density and large volume (thus the buoyant effect), the aggregated oil droplets actually promoted oil/ionic liquid phase separation and distressed emulsion stability. Systems with binary heterogeneous polystyrene microparticles exhibited similar, even enhanced (in terms of surface chemistry dependence), bridging phenomenon in the PDMS-in-[BMIM][PF
6] Pickering emulsions.</abstract><cop>Amsterdam</cop><pub>Elsevier Inc</pub><pmid>21840016</pmid><doi>10.1016/j.jcis.2011.07.056</doi><tpages>7</tpages></addata></record> |
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| subjects | Bridges (structures) Chemistry Colloidal state and disperse state Droplets Emulsion stability Emulsions Emulsions. Microemulsions. Foams Exact sciences and technology General and physical chemistry Ionic liquid ionic liquids Liquids Microparticle bridging Microparticles oils Particle assembly Physical and chemical studies. Granulometry. Electrokinetic phenomena Pickering emulsions Polystyrene resins polystyrenes Self assembly separation Sulfates Surface physical chemistry |
| title | Particle self-assembly in oil-in-ionic liquid Pickering emulsions |
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