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Role of Nanocomposite Structure in Polyurethane Coatings for Slow-Release Fertilizers: A Case Study with Brachiaria brizantha

Year: 2025
Type: article
Abstract: High Resolution Image Download MS PowerPoint Slide We developed a nanocomposite coating system based on castor oil-derived polyurethane (PU) and montmorillonite for the controlled release of urea. The incorporation of low amounts of nanoclay effectively slowed nitrogen diffusion through an ion exchange mechanism, resulting in a reduction from 70 to 20% in 215 h (treatment with less than 5%). Greenhouse experiments using Brachiaria brizantha demonstrated that the coated fertilizers promoted improved nitrogen uptake and biomass production compared to uncoated urea. Sequential harvests showed that the benefits were consistent across growth stages, with a more evident cumulative effect over 135 days. The results highlight the critical role of nanocomposite structure in enhancing nutrient use efficiency and reducing environmental losses. This approach enables the use of thinner coatings without compromising performance, providing a sustainable alternative for the development of advanced controlled-release fertilizers.
DOI: 10.1021/acsagscitech.5c00509
Authors: Vinícius Ferraz Majaron, Cassio Luiz Vellani, Alexandre Antonio Fidelis Martins Junior, Sendy Marques Soares, Fernando Ferrari Putti, Murilo Daniel de Mello Innocentini, Alberto Carlos Campos Bernardi, Wagner Luiz Polito, Caue Ribeiro, Ricardo Bortoletto-Santos
Institutions: Universidade de São Paulo, Instituto de Química de São Carlos, Embrapa Instrumentação, Universidade de Ribeirão Preto, Universidade Estadual Paulista (Unesp), Embrapa Southeastern Livestock
Language: English
Open Access status: hybrid
Estimated APC paid: $4,500
Funders: Fundação de Amparo à Pesquisa do Estado de São Paulo, Ministério da Ciência, Tecnologia e Inovação, Conselho Nacional de Desenvolvimento Científico e Tecnológico, Financiadora de Estudos e Projetos, Sistema de Laboratórios em Nanotecnologias, Universidade Federal de Viçosa, Laboratório Nacional de Nanotecnologia
Awards: G1258837586, G1682766553, G1928655771, G2089597031, G225733124, G297947535, G3277777562, G4452373687, G4458245115, Development of wet mechanochemical treatment for the use of WTP sludge as raw material for the production of controlled-release fertilizers, G5862545620, G6070284109, G6357454366, G6540720261, G6639640792, G6645604035, Development of technological alternatives for the use of ETA sludge as raw material for the production of controlled release fertilizers, G7921202162, G954568416
OpenAlex ID: W7082655923
FWCI: 0.937
Cites: 25
Cited by: 4
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