Formulation and characterization of polyester-lignite composite coated slow-release fertilizers

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dc.contributor.authorGunaratnam A
dc.contributor.authorBishop P
dc.contributor.authorJeyakumar P
dc.contributor.authorGrafton M
dc.contributor.authorDavies CE
dc.contributor.authorMcCurdy M
dc.date.available2022-09-26
dc.date.issued2022-09-26
dc.descriptionCAUL read and publish agreement 2022
dc.description.abstractTwo polyester-lignite composite coated urea slow-release fertilizers (SRFs; Poly3 and Poly5) were developed and their physicochemical properties were studied. Both these SRFs significantly (p < 0.05) extended the urea release compared to uncoated urea; Poly3 and Poly5 by 117 and 172 h, respectively. The urea release characteristics of Poly5 were further enhanced by linseed oil application (Poly5-linseed). The SEM images demonstrated the coatings were in contact with the urea and encase urea particles completely with the average coating thickness of 167.2 ± 15 µm. The new interactions between polyester and lignite in the composite coating were confirmed by the FTIR analysis. Polyester-calcium carbonate (Polyester-CaCO3) coated SRFs (Calc3 and Calc5) were developed using CaCO3 as a filler in place of lignite and the urea dissolution rate was compared with Poly3 and Poly5. The urea release times for the polyester-CaCO3 formulations, 48 and 72 h, were significantly (P < 0.05) lower than the polyester-lignite formulation, showing that lignite imparted greater control over release time than CaCO3. Findings from this work showed that polyester-lignite composites can be used as a coating material for SRFs.
dc.description.confidentialfalse
dc.format.extent? - ? (14)
dc.identifierhttps://link.springer.com/article/10.1007/s11998-022-00670-6
dc.identifiers11998-022-00670-6
dc.identifier.citationJournal of Coatings Technology and Research, 2022, pp. ? - ? (14)
dc.identifier.doi10.1007/s11998-022-00670-6
dc.identifier.elements-id456946
dc.identifier.harvestedMassey_Dark
dc.identifier.issn1547-0091
dc.languageEnglish
dc.publisherSpringer Nature Switzerland AG
dc.publisher.urihttps://link.springer.com/article/10.1007/s11998-022-00670-6
dc.relation.isPartOfJournal of Coatings Technology and Research
dc.rights(c) The Author/s
dc.subjectCalcium carbonate
dc.subjectlignite
dc.subjectlinseed oil
dc.subjectpolyester
dc.subjectSlow release fertilizer
dc.subject.anzsrc0912 Materials Engineering
dc.titleFormulation and characterization of polyester-lignite composite coated slow-release fertilizers
dc.typeJournal article
pubs.notesNot known
pubs.organisational-group/Massey University
pubs.organisational-group/Massey University/College of Sciences
pubs.organisational-group/Massey University/College of Sciences/School of Agriculture & Environment
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