Rate of fatty acid transport in glassy biopolymers: A free volume based predictive approach

Paramita, Vilia Darma and Kasapis, Stefan (2018) Rate of fatty acid transport in glassy biopolymers: A free volume based predictive approach. Food Hydrocolloids, 78. pp. 128-131. ISSN 1873-7137

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Metastable properties of biopolymer networks affect significantly the diffusion kinetics of bioactive
compounds. That was shown to be the case in high solid samples of protein and polysaccharide supporting a homogeneous distribution of polyunsaturated fatty acids. Thermomechanical behaviour of
these matrices was characterised in relation to their glass transition temperature (Tg). A free volume
theory of diffusion was considered to treat transport phenomena of fatty acids within glassy polymers. It
was found that at T > T
g the effective diffusion coefficient of microconstituent transport would increase in
accordance with the free volume of the polymer matrix. Fitting experimental diffusivity data in glassy
polymers to a free volume based theory generates a two-parameter equation that calculates the extent of
molecular interaction between macromolecule and microconstituent. Gradual substitution of polymer
with small-molecule co-solute, glucose syrup in this case, induces a plasticising effect that profoundly
affects the level of interaction, hence the diffusion of fatty acids in the condensed biomaterial.

Item Type: Article
Subjects: S Agriculture > S Agriculture (General)
T Technology > TP Chemical technology
Divisions: Jurusan Kimia > D4 Teknologi Kimia Industri
Depositing User: Unnamed user with email itcenter@poliupg.ac.id
Date Deposited: 22 Apr 2023 10:13
Last Modified: 26 Jul 2023 17:46
URI: http://repository.poliupg.ac.id/id/eprint/705

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