Transitional behavior of polymeric hollow microsphere formation in turbulent shear flow by emulsion diffusion method
Polymeric hollow microspheres have attracted growing attention because of their unique properties and extensive applications. We report a facile emulsion diffusion process to fabricate polylactic acid (PLA) hollow microspheres driven by viscous turbulent fluid flow. The process involves the emulsifi...
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| Veröffentlicht in: | Polymer (Guilford) 2012-01, Vol.53 (1), p.205-212 |
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| creator | Ji, Shaowen Srivastava, Devesh Parker, Nathan J. Lee, Ilsoon |
| description | Polymeric hollow microspheres have attracted growing attention because of their unique properties and extensive applications. We report a facile emulsion diffusion process to fabricate polylactic acid (PLA) hollow microspheres driven by viscous turbulent fluid flow. The process involves the emulsification of PLA–ethyl acetate solution in the water–glycerol medium under high viscous turbulent shear flow where emulsion droplets coalesce into multiple emulsions, and the solidification of PLA by the diffusion of ethyl acetate. The addition of glycerol changed the viscosity of the continuous aqueous phase, resulting in the transition of fluid flow from inertial turbulent to viscous turbulent dominant regime and thus PLA particle size and shape from solid nanospheres to hollow microspheres. The emulsification temperature also needs to exceed the glass transition temperature of PLA to form hollow microstructure. This method allows the easy control of PLA particle shape and size for different applications.
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| doi_str_mv | 10.1016/j.polymer.2011.11.013 |
| format | Article |
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[Display omitted]</description><subject>Applied sciences</subject><subject>Diffusion</subject><subject>Droplets</subject><subject>emulsifying</subject><subject>Emulsion diffusion</subject><subject>Emulsions</subject><subject>ethyl acetate</subject><subject>Exact sciences and technology</subject><subject>Fluid dynamics</subject><subject>Fluid flow</subject><subject>Forms of application and semi-finished materials</subject><subject>glass transition temperature</subject><subject>glycerol</subject><subject>Hollow microspheres</subject><subject>Microspheres</subject><subject>microstructure</subject><subject>Miscellaneous</subject><subject>nanospheres</subject><subject>particle size</subject><subject>polylactic acid</subject><subject>Polymer industry, paints, wood</subject><subject>solidification</subject><subject>Technology of polymers</subject><subject>Turbulence</subject><subject>Turbulent eddies</subject><subject>Turbulent flow</subject><subject>viscosity</subject><issn>0032-3861</issn><issn>1873-2291</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2012</creationdate><recordtype>article</recordtype><recordid>eNqFkU1r3DAQhkVooNs0P6FUl0Iv3urLXulUSmjaQiCHJmchS6NYi2xtJTth_33l7NJrYUA6PPPO6BFCHyjZUkK7L_vtIcXjCHnLCKXbWoTyC7ShcscbxhR9gzaEcNZw2dG36F0pe0IIa5nYoPkhm6mEOaTJRNzDYJ5Dyjh5fM4MFg8pxvSCx2BzKocBMmCf8mjWJhwmPC-5XyJMMy4DmIz9SvdHDOMSy8q44P3yehthHpJ7jy69iQWuz-cVerz9_nDzs7m7__Hr5ttdYwXnc9MxYp0innSM7yQzQnoupOuFoHxHGCjSK2m98cJxKRzrWy92lgvivFS2wlfo8yn3kNOfBcqsx1AsxGgmSEvR1R6RqoarirYndH1jyeD1IYfR5GOFVq7Te302olfLula1XPs-nUeYYk301aYN5V8za0XXtURU7uOJ8yZp85Qr8_i7BrX1J5RqKavE1xMB1chzqHOKDTBZcCGDnbVL4T-7_AWT86GA</recordid><startdate>20120105</startdate><enddate>20120105</enddate><creator>Ji, Shaowen</creator><creator>Srivastava, Devesh</creator><creator>Parker, Nathan J.</creator><creator>Lee, Ilsoon</creator><general>Elsevier Ltd</general><general>Elsevier</general><scope>FBQ</scope><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>8FD</scope><scope>F28</scope><scope>FR3</scope><scope>JG9</scope></search><sort><creationdate>20120105</creationdate><title>Transitional behavior of polymeric hollow microsphere formation in turbulent shear flow by emulsion diffusion method</title><author>Ji, Shaowen ; Srivastava, Devesh ; Parker, Nathan J. ; Lee, Ilsoon</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c433t-620cd90f0623782a48f348db4413702e90b98cfaf4d384d2b5f47c340df89c8f3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2012</creationdate><topic>Applied sciences</topic><topic>Diffusion</topic><topic>Droplets</topic><topic>emulsifying</topic><topic>Emulsion diffusion</topic><topic>Emulsions</topic><topic>ethyl acetate</topic><topic>Exact sciences and technology</topic><topic>Fluid dynamics</topic><topic>Fluid flow</topic><topic>Forms of application and semi-finished materials</topic><topic>glass transition temperature</topic><topic>glycerol</topic><topic>Hollow microspheres</topic><topic>Microspheres</topic><topic>microstructure</topic><topic>Miscellaneous</topic><topic>nanospheres</topic><topic>particle size</topic><topic>polylactic acid</topic><topic>Polymer industry, paints, wood</topic><topic>solidification</topic><topic>Technology of polymers</topic><topic>Turbulence</topic><topic>Turbulent eddies</topic><topic>Turbulent flow</topic><topic>viscosity</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Ji, Shaowen</creatorcontrib><creatorcontrib>Srivastava, Devesh</creatorcontrib><creatorcontrib>Parker, Nathan J.</creatorcontrib><creatorcontrib>Lee, Ilsoon</creatorcontrib><collection>AGRIS</collection><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>Technology Research Database</collection><collection>ANTE: Abstracts in New Technology & Engineering</collection><collection>Engineering Research Database</collection><collection>Materials Research Database</collection><jtitle>Polymer (Guilford)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Ji, Shaowen</au><au>Srivastava, Devesh</au><au>Parker, Nathan J.</au><au>Lee, Ilsoon</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Transitional behavior of polymeric hollow microsphere formation in turbulent shear flow by emulsion diffusion method</atitle><jtitle>Polymer (Guilford)</jtitle><date>2012-01-05</date><risdate>2012</risdate><volume>53</volume><issue>1</issue><spage>205</spage><epage>212</epage><pages>205-212</pages><issn>0032-3861</issn><eissn>1873-2291</eissn><coden>POLMAG</coden><abstract>Polymeric hollow microspheres have attracted growing attention because of their unique properties and extensive applications. 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| ispartof | Polymer (Guilford), 2012-01, Vol.53 (1), p.205-212 |
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| language | eng |
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| source | Elsevier ScienceDirect Journals Complete |
| subjects | Applied sciences Diffusion Droplets emulsifying Emulsion diffusion Emulsions ethyl acetate Exact sciences and technology Fluid dynamics Fluid flow Forms of application and semi-finished materials glass transition temperature glycerol Hollow microspheres Microspheres microstructure Miscellaneous nanospheres particle size polylactic acid Polymer industry, paints, wood solidification Technology of polymers Turbulence Turbulent eddies Turbulent flow viscosity |
| title | Transitional behavior of polymeric hollow microsphere formation in turbulent shear flow by emulsion diffusion method |
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