Page Banner

United States Department of Agriculture

Agricultural Research Service

Title: Permeability of starch gel matrices and select films to solvent vapors

Authors
item Glenn, Gregory
item Klamczynski, Artur
item Ludvik, Charles
item Shey, Justin - SAN FRANCISCO
item Imam, Syed
item Chiou, Bor-Sen
item McHugh, Tara
item Orts, William
item Wood, Delilah
item Degrandi-Hoffman, Gloria
item Offeman, Richard

Submitted to: Journal of Agricultural and Food Chemistry
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: March 1, 2006
Publication Date: May 3, 2006
Citation: Glenn, G.M., Klamczynski, A., Ludvik, C.N., Shey, J., Imam, S.H., Chiou, B., Mchugh, T.H., Orts, W.J., Wood, D.F., Hoffman, G.D., Offeman, R.D. 2006. Permeability of starch gel matrices and select films to solvent vapors. Journal of Agricultural and Food Chemistry. 54(9):3297-3304.

Interpretive Summary: The controlled release of volatile, agrochemicals is critical in developing approaches to pest control that are economically viable and environmentally sound. Dispensing systems that are made of materials that degrade in agricultural environments when they are spent offer distinct advantages over non-degrading 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.

Technical Abstract: The controlled release of volatile, agrochemicals is critical in developing approaches to pest control that are economically viable and environmentally sound. Dispensing systems that are made of materials that degrade in agricultural environments when they are spent offer distinct advantages over non-degrading 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 beeswax, 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 beeswax, blends of beeswax and paraffin wax or laminates consisting of beeswax and fruit film.

Last Modified: 9/1/2014
Footer Content Back to Top of Page