Journal Article

FZJ-2024-00258

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Revealing the Structure Formation on Polyglycerol Citrate Polymers—An Environmentally Friendly Polyester as a Seed-Coating Material

Giroto, A. S. (Corresponding author) ; Valle, S. F. ; Borges, R. ; Colnago, L. A. ; Ribeiro, T. S. ; Jablonowski, N. D. (Corresponding author)FZJ* ; Ribeiro, C. (Corresponding author) ; Mattoso, L. H. C.

2023
MDPI Basel

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Please use a persistent id in citations: doi:10.3390/polym15214303  doi:10.34734/FZJ-2024-00258

Abstract: A detailed structural investigation of a promising bio-based polymer, polyglycerol citrate polyester, obtained by the bulk polycondensation of glycerol (Gly) against citric acid (Cit) under mild reaction was performed. The reaction in conditions with and without catalyst use (sulfuric acid, H2SO4) was investigated, showing evidence that it is possible to modify the polymer solubility according to the ratio and catalyst utilization. 13C and 1H NMR indicated that synthesis catalyzed with Cit excess leads to higher esterification degrees of citrate groups. In contrast, the Gly moieties are more prominent in catalyzed polymers regardless of the excess monomers. Overall, a successful conversion of Gly and Cit into polyesters was attained even without catalysis, enabling a simple route for the large-scale production of this green material to be used as a coating material. This polymer has been shown to be well-suited for coating seeds and might be a promising material for similar agricultural applications. Tests on soybean seed coating with a PGCit solution of 75% indicated that the seed quality and germination rate were not affected by the PGCit coating, concluding that this polymer is suitable for this application.

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Contributing Institute(s):

1. Pflanzenwissenschaften (IBG-2)

Research Program(s):

1. 2172 - Utilization of renewable carbon and energy sources and engineering of ecosystem functions (POF4-217) (POF4-217)

Appears in the scientific report 2023

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