DEVELOPMENT OF AGRICULTURALLY-DERIVED BIOPOLYMER COMPOSITES FOR NON-FOOD APPLICATIONS
Location: Bioproduct Chemistry and Engineering Research
Title: USE OF STARCH GEL MATRICES FOR CONTROLLED-RELEASE OF VOLATILE LIQUIDS
Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: December 12, 2005
Publication Date: May 12, 2006
Citation: Glenn, G.M., Klamczynski, A., Ludvik, C.N., Shey, J., Imam, S.H., Orts, W.J., Chiou, B., Wood, D.F. 2005. Use of starch gel matrices for controlled-release of volatile liquids. Pacifichem International Symposia, Honolulu, Hawaii, December 15-20, 2005, Paper #569 MACR.
The controlled release of volatile, biologically active compounds such as insect pheromones is critical in developing approaches to pest control that are economically and environmentally sound. Dispensing systems that are made of materials that degrade in agricultural environments when they are spent offer distinct advantages over dispensing systems that must be collected from the field when their functional life is over. The present study describes the use of starch gels and foams along with biobased films and coatings to control the release of volatile liquids with particular emphasis on 2-heptanone which has miticidal properties. Starch foam matrices immobilized several times their weight of solvent but were not effective in adequately controlling the release rate of 2-heptanone. Films made of bees wax, paraffin, ethylene (vinyl alcohol) copolymer (48 mol% ethylene) and a commercial fruit film were used as coatings to reduce the vapor transmission rate of volatile liquids. The release rate of 2-heptanone was effectively controlled by using films of bees wax, blends of bees and paraffin waxes or laminates consisting of bees wax and fruit film.