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Influence of surface morphology and structure of alginate microparticles on the bioactive agents release behavior

Jurić, Slaven; Šegota, Suzana; Vinceković, Marko (2019) Influence of surface morphology and structure of alginate microparticles on the bioactive agents release behavior. Carbohydrate polymers, 218 . pp. 234-242. ISSN 0144-8617

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The structure-property relationship in alginate microparticles (microspheres and microcapsules prepared with or without Trichoderma viride spores (Tv) was investigated. Surface morphology, structure and release behavior from alginate microparticles strongly depend on calcium concentration and presence of Tv and chitosan layer. All microparticles exhibited a granular surface structure with substructures consisting of abundant smaller particles. In vitro active agents release study revealed that the increase in calcium cation concentration reduced the release rate of Tv (~84% for microspheres ; ~57% for microcapsules) and calcium cations (~20% for microspheres ; ~23% for microcapsules). The average decrease in k values due to chitosan layer addition is 41% for Tv and 93% for calcium ions, respectively. The underlying Tv release mechanism from microspheres is anomalous transport kinetics, whereas from microcapsules is controlled by Type II transport. The differences in microparticle surface properties did not affect the mechanism controlling calcium ions release detected as diffusion through microparticles.

Item Type: Article
Uncontrolled Keywords: alginate microparticles, biofertilizer, release mechanism, structure/property relationship, Trichoderma viride
Subjects: NATURAL SCIENCES > Chemistry
NATURAL SCIENCES > Chemistry > Physical Chemistry
Divisions: Division of Physical Chemistry
Project titleProject leaderProject codeProject type
Nove biopolimerne mikrokapsule za kontrolirano otpuštanje tvari za zaštitu/ishranu bilja-NewBioCap/NoveBioKapMarko VincekovićUIP-2014-09-6462HRZZ
Depositing User: Suzana Šegota
Date Deposited: 07 Dec 2020 09:59
DOI: 10.1016/j.carbpol.2019.04.096

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