TY - JOUR
T1 - Photothermal-responsive release of pesticides from sodium alginate-based composite beads
T2 - a sustainable delivery system enhanced by nanodiamonds
AU - Luo, Yu
AU - Ma, Yuze
AU - Li, Jing
AU - Ge, Guangning
AU - Xie, Fengwei
AU - Bai, Bo
AU - Dai, Wanqian
AU - Wu, Huihui
AU - Liu, Yali
N1 - Publisher Copyright:
© The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2025.
PY - 2025/11/20
Y1 - 2025/11/20
N2 - This investigation explores the development of a photothermal-responsive pesticide delivery system using composite beads composed of sodium alginate (SA), yeast (YS), polyvinyl alcohol (PVA), citric acid (CA), and detonation nanodiamond (DND). The beads were synthesized via ionotropic gelation and characterized for morphology, thermal stability, and functional group content. SA formed the primary biodegradable matrix, while DND significantly enhanced photothermal conversion efficiency and mechanical strength. YS mitigated drying shrinkage and improved water retention capacity, and CA enhanced structural stability. The release of fulvic acid (FA) as a model pesticide was evaluated under light exposure, demonstrating a controlled release behavior driven by the photothermal-responsive effect of DND. The release kinetics were best described by the Korsmeyer-Peppas model, which directly evidences the transition from relaxation-dominated to diffusion-relaxation-coupled release, driven by the photothermal-responsive effect of DND. This study provides a promising strategy for the controlled release of pesticides in agricultural applications, leveraging the photothermal-responsive properties of DND, the structural matrix provided by SA, the morphological stability imparted by YS, and the protective coating of CA.
AB - This investigation explores the development of a photothermal-responsive pesticide delivery system using composite beads composed of sodium alginate (SA), yeast (YS), polyvinyl alcohol (PVA), citric acid (CA), and detonation nanodiamond (DND). The beads were synthesized via ionotropic gelation and characterized for morphology, thermal stability, and functional group content. SA formed the primary biodegradable matrix, while DND significantly enhanced photothermal conversion efficiency and mechanical strength. YS mitigated drying shrinkage and improved water retention capacity, and CA enhanced structural stability. The release of fulvic acid (FA) as a model pesticide was evaluated under light exposure, demonstrating a controlled release behavior driven by the photothermal-responsive effect of DND. The release kinetics were best described by the Korsmeyer-Peppas model, which directly evidences the transition from relaxation-dominated to diffusion-relaxation-coupled release, driven by the photothermal-responsive effect of DND. This study provides a promising strategy for the controlled release of pesticides in agricultural applications, leveraging the photothermal-responsive properties of DND, the structural matrix provided by SA, the morphological stability imparted by YS, and the protective coating of CA.
KW - Alginate beads
KW - Fulvic acid
KW - Nanodiamonds
KW - Pesticide controlled release
KW - Photothermal-responsive materials
UR - https://www.scopus.com/pages/publications/105022637840
U2 - 10.1007/s00396-025-05520-6
DO - 10.1007/s00396-025-05520-6
M3 - Article
AN - SCOPUS:105022637840
SN - 0303-402X
JO - Colloid and Polymer Science
JF - Colloid and Polymer Science
ER -