studying the effect of temperature and nanoreinforcement on the migration of tbhq antioxidant from poly(lactic acid) based nanocomposite active film

a poly(lactic acid) (pla) based nanocomposite active packaging has been developed for the controlled release of tert-butylhydroquinone (tbhq) antioxidant. pla based active films were loaded with tbhq (3%wt) or mixture of modified cellulose nanofiber (mcnf) (8%wt) and tbhq (3%wt) to obtain active and nanocomposite active films, respectively. release studies indicated that the release rate of tbhq in 95% ethanol simulant decreased by the addition of mcnf. faster and higher release of tbhq occurred at 40 °c according to arrhenius law. however, the presence of mcnf diminished the increasing effect of temperature on the release rate. the diffusion coefficient (d) for pla-tbhq and pla-mcnf-tbhq films increased from 6.75 and 4.34 ×10-8 cm2.s-1 to 19.85 and 8.49 ×10-8 cm2.s-1 respectively by increasing temperature from 4 °c to 40 °c. also the presence of mcnf caused to increase in activation energy of naocomposite active film.