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Novel Biodegradable Nanocomposites Based on Alkyd Resin and In-Situ Produced Silica James E. Mark, University of Cincinnati Main Campus, DMR 0803454.

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Education

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  1. Novel Biodegradable Nanocomposites Based on Alkyd Resin and In-Situ Produced SilicaJames E. Mark, University of Cincinnati Main Campus, DMR 0803454 The focus of this project was to reinforce a biodegradable polymer (a glycerol-derived thermoset) with in-situ silica using a sol-gel method. Specifically, alkyd hybrid nanocomposites were successfully prepared via in-situ hydrolysis of an alkoxysilane in a glycerol-derived alkyd resin precursor, and subsequently cross linked at high temperature by polycondensation reactions. These sol-gel reactions formed ceramic-like domains having amino groups that reacted with the carboxylic acid groups on the polymeric acid at elevated temperatures, and this improved the dispersion of silica at the nanoscale level. Relatively small amounts of a bonding agent were found to increase the thermal decomposition temperatures of these hybrid materials as well as their glass transition temperatures. The upper part of the figure shows the morphology of an alkyd themoset/silica (20.0%) nanocomposite transparent film; the lower part shows a TEM image (with a 100 nm bar showing the sizes of the silica particles). Some of the results were presented to the 2008 236th ACS National Meeting in Philadelphia, and at the International Symposium of Polymer Chemistry held in Hefei, China in 2008.

  2. Novel Biodegradable Nanocomposites Based on Alkyd Resin and In-Situ Produced SilicaJames E. Mark, University of Cincinnati Main Campus, DMR 0803454 Education This grant and a previous NSF Grant partially supported three graduate students, Leiyuchuan Ding (3rd year), Yan Zhang (2nd year) and supported Xiujuan Zhang who was awarded her Ph. D. degree in Jun 2009 and began employment in ITW - Frankylnn Inc. It also partially supports one post-doctoral research fellow, Gui Lin. Industrial Collaboration Procter & Gamble Company in Cincinnati Outreach Knowledge developed in this program is being incorporated into various courses. Also, presentations have been given at several national and international conferences, and papers are being submitted to journals. Some of the results are also included in the Polymer Data Handbook shown in the figure.

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