Polymer microsphere and polymer-ferrite nanocomposite preparation by precipitation from water-in-oil microemulsions |
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| Authors: | S Banerjee V T John G L McPherson C J O’Connor Y S L Buisson J A Akkarra D L Kaplan |
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| Institution: | (1) Department of Chemical Engineering Tulane University New Orleans, LA 70118, USA E-mail: vj@mailhost.tcs.tulane.edu, US;(2) Department of Chemistry Tulane University New Orleans, LA 70118, USA, US;(3) Department of Chemistry University of New Orleans, LA 70148, USA, US;(4) U.S. Army Soldier Systems Command Natick, MA 01760, USA, US |
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| Abstract: | A simple method to encapsulate intramicellar solutes (enzymes, nanoparticles) in polymer microspheres is described. The method
involves dissolving a polymer in a minimum amount of solvent. The polymer solution is then added to a large volume of a nonsolvent
system containing bis(2-ethylhexyl)sulfo-succinate (AOT) reversed micelles. Immediate precipitation of the dissolved polymer
takes place. The precipitation results in the formation of stable microparticles ∼0.1–1 μm in diameter. There is a direct
correlation between the internal voidage of the particles and the water content of the micelles. Precipitation also leads
to encapsulation of intramicellar solutes, resulting in the formation of microspherical composites.
Received: 18 February 1997 Accepted: 30 April 1997 |
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| Keywords: | Encapsulation polyphenol w / o microemulsion magnetic microspheres |
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