Morphological, rheological and thermal characteristics of biopolymeric microcapsules loaded with plant stimulants
Vinceković M. Jurić S. Šegota S. Šijaković Vujičić N. Španić N. Mutaliyeva B. Prosyanik A.V. Marijan M.
May 2022Springer Science and Business Media B.V.
Journal of Polymer Research
2022#29Issue 5
Morphological, rheological, and thermal properties of biopolymeric microcapsules loaded with novel plant growth regulators (2,3-dehydroaspartic acid dimethyl ester (PGR1), Z-isomer of the potassium salt of 2-amino-3-methoxycarbonylacrylic acid (PGR2) and 1-methyl-3-methylamino-maleimide (PGR3)) were studied. Microcapsule formulations containing PGR2 or PGR3 had a granular surface structure with substructures, whereas those containing PGR1 had smooth surfaces with no grain substructures. All formulations had storage moduli (G ′) greater than loss moduli (G ′′), indicating viscoelastic solid behavior. The application of angular frequency over the range tested did not significantly change G’ and G’’ values indicating well-ordered structures for all samples. Compared to other formulations, the highest values of storage modulus, yield strength and flow point obtained for formulations with PGR3 indicated an advantage in terms of stability in various physical environments. Thermal analysis showed good thermal stability of all formulations and is consistent with rheological properties confirming well-ordered structures. Encapsulated PGRs affect the intensity of intermolecular forces (electrostatic interaction and hydrogen bonds), thus changing the crosslinking density of the alginate network and the basic physicochemical properties of the formulations.
Microcapsules , Morphology , Rheology , Structure/property relationship , Thermal properties
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Faculty of Agriculture, Department of Chemistry, University of Zagreb, Svetošimunska 25, Zagreb, Croatia
Division of Physical Chemistry, Ruđer Bošković Institute, Bijenička cesta 54, Zagreb, Croatia
Division of Organic Chemistry and Biochemistry, Ruđer Bošković Institute, Bijenička cesta 54, Zagreb, Croatia
Faculty of Forestry, University of Zagreb, Zagreb, Croatia
Biotechnology Department, M. Auezov South-Kazakhstan University, Shymkent, pr. Tauke Khan, Kazakhstan
Gagarina Av, UkrainianState University of Chemical Technology, Dnipro, Ukraine
Faculty of Agriculture
Division of Physical Chemistry
Division of Organic Chemistry and Biochemistry
Faculty of Forestry
Biotechnology Department
Gagarina Av
10 лет помогаем публиковать статьи Международный издатель
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