TITLE:
Diffusion Analysis and Modeling of Potassium Sorbate in Gelatin Based Antimicrobial Film
AUTHORS:
Hui Wang, Jieyu He, Hongyuan Sun
KEYWORDS:
Potassium Sorbate, Gelatin, Diffusivity, Fick’s Mathematical Model
JOURNAL NAME:
Journal of Materials Science and Chemical Engineering,
Vol.4 No.7,
July
25,
2016
ABSTRACT: The diffusion of
potassium sorbate incorporated into gelatin based antimicrobial film was measured.
Fick’s second law was applied to investigate the mechanism of potassium sorbate
released from the films. The mathematical model was established. The result
showed that the diffusion coefficient D increased with the increase of potassium sorbate concentration. The effects of
temperature 5?C, 25?C and 35?C on diffusion were investigated. The mechanisms
of potassium sorbate diffusion through gelatin films were mainly Fickian and
determined by the power law model Mt/M∞ = k × tn. A
decrease in temperature from 35?C to 5?C resulted in a reduction of diffusion coefficients
from 5.20 × 10?12 to 1.36 × 10?12 m2/s. The diffusion coefficient of potassium sorbate is
influenced by receiving solution pH values.