Abstract
The release kinetics of nisin from poly(butylene adipate- co-terephthalate) (PBAT) to distilled water was studied at of 5.6, 22 and 40 °C. The release kinetics of nisin from PBAT film was described using Fick’s second law of diffusion, partition coefficient, and Weibull model. The diffusion coefficients ( D) determined were 0.93, 2.29, and 5.78 × 10 −10 cm 2/s at 5.6, 22, and 40 °C, respectively. The partition coefficients ( K) calculated were 0.84, 3.89, and 5.2 × 10 3 at 5.6, 22, and 40 °C, respectively. The nisin release data at selected temperatures were fitted with the Weibull model ( R 2 > 0.97) with b and n values ranging from 0.02 to 0.98 and from 0.28 to 0.45, respectively. The temperature dependence of D, K, and Weibull model parameter b was modeled using the Arrhenius equation giving values of activation energy ( E a ) of 38.3 kJ mol −1 (for D), 38.5 kJ mol −1 (for K), and 79.5 kJ mol −1 (for b).
Published Version
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