Spray-dried chitosan/nanocellulose microparticles: synergistic effects for the sustained release of NPK fertilizer

Autor(es)

Messa, Lucas Luiz ^{[1, 2]} ; Faez, Roselena ^{[1, 2, 3]}

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Carlos, Lab Polymer Mat & Biosorbents, UFSCar, BR-13600970 Araras, SP - Brazil

^[2] Univ Sao Paulo, Grad Program Mat Sci & Engn, USP FZEA, BR-13635900 Pirassununga, SP - Brazil

^[3] Univ Fed Sao Carlos, Lab MPB Lab Mat Polimer & Biossorventes, Dept Ciencias Nat Matemat & Educ, Rod Anhanguera, Km 174 SP-330, POB 153, BR-13600970 Araras, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Cellulose; v. 27, n. 17, p. 10077-10093, NOV 2020.
• Citações Web of Science: 6

Resumo

Enhanced efficiency fertilizers help to provide desirable nutrients to plants and release them in a prolonged time. The public concern about environmental protection and efficiency in the use of resources has increased the need to produce eco-friendly and high-performance products. In this work, we report the preparation and properties of the sustained release of spray-dried microparticles based on two biopolymers, chitosan, and nanocellulose. Cellulose rich solid was isolated from waste sugarcane bagasse by chlorine-free alkali peroxide procedure, yielding solids at 45.2%. Nanocellulose with sulfate groups attached on its surface was obtained by acid hydrolysis, and then it was incorporated into chitosan (CS) and NPK fertilizer solution, followed by spray drying to yield microparticles. The CS microparticles caused a decrease in the initial release rate of NPK, which resulted in extended-release of the entrapped nutrients (around 2 h). The incorporation of 10 wt.% nanocellulose to microparticles provided the most significant reduction on fertilizer release rate within 5 h. The work demonstrates the potential use of sulfated nanocellulose in biopolymeric matrices to design enhanced fertilizer release systems. (AU)

• Processo FAPESP: 17/03980-7 - Biocompósitos ferti-liberadores à base de quitosana e celulose obtidos pela técnica spray drying
• Beneficiário: Lucas Luiz Messa
• Modalidade de apoio: Bolsas no Brasil - Doutorado Direto
• Processo FAPESP: 19/02535-5 - Estruturas poliméricas como matrizes hospedeiras para nutrientes de liberação programada: fertilizantes ambientalmente amigáveis
• Beneficiário: Roselena Faez
• Modalidade de apoio: Auxílio à Pesquisa - Regular