Submitted to: Annual Meeting and Expo of the American Oil Chemists' Society
Publication Type: Abstract Only
Publication Acceptance Date: October 24, 2006
Publication Date: May 13, 2007
Citation: Kenar, J.A., Compton, D.L., Felker, F.C., Laszlo, J.A. 2007. Feruloylated soybean oil-starch composites: Aqueous dispersions of a soy-based sunscreen active ingredient [abstract]. American Oil Chemists' Society. p. 97-98. Technical Abstract: Recent National Center for Agricultural Utilization Research (NCAUR) technology can be utilized to produce stable aqueous starch-oil composites from renewable resources by excess steam jet-cooking aqueous slurries of starch and vegetable oils or other hydrophobic materials. Herein, ultraviolet absorbing lipids were synthesized by the lipase catalyzed (Novozym 435) transesterification of soybean oil with ethyl ferulate. The resulting feruloylated monoacyl- and diacylglycerols (FMDG) mixture was subsequently jet-cooked with starch to produce FMDG-starch composites containing FMDG microdroplets (1 to 10 micrometers). Transmittance and irradiance measurements of UV radiation (300 to 400 nm) through thin films of the neat FMDG and starch-FMDG composite showed the composite retained its ultraviolet absorbing efficacy after jet cooking. Furthermore, the starch-FMDG composite enhanced the ultraviolet absorbance of the feruloylated lipids relative to neat FMDG. The FMDG-starch composites needed only half of the coverage (mg/cm2) of FMDG to block the same amount or more UV radiation as the neat FMDG. This technology allows aqueous dispersions of FMDG to be formulated without the need for surfactants. Aqueous dispersions of starch-FMDG composites can be drum dried to powder form and easily reconstituted into water without the loss of ultraviolet absorbing efficacy.