Estimation of diffusion coefficient of nano-components migration in nano-metal/metal oxide-polyolefin food packaging film

Abstract

Abstract: Abstract: Based on the experimental data, the diffusion coefficients of nano-components in nano-metal/metal oxide-polyolefin food packaging film were estimated by fitting the Crank model.The effects of temperature, polyolefin, nano-components and food simulants on the diffusion coefficient were discussed. The results show that the increase of temperature promotes the migration of nano-components, and the relationship between diffusion coefficient of nano-components and temperature is in accordance with the Arrhenius formula. In the three structures of polypropylene (PP), nano-copper and nano-zinc oxide have the largest diffusion coefficient in isotactic polypropylene (PP-H).The diffusion coefficients of nano-copper and nano-silver decrease as its concentration increases. Different nano-components have different effects on their diffusion coefficients. The solubility differences among nano-components, food simulants and polyolefins affect the migration of nano-components to food simulants too.

Key words: diffusion coefficient, migration model, temperature, polyolefin, nano-components, food simulants

CLC Number:

TS202.3

Hu Changying. Estimation of diffusion coefficient of nano-components migration in nano-metal/metal oxide-polyolefin food packaging film[J]. FOOD SCIENCE, 0, (): 0-0.

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