Cellulose-Based Photothermal Coating: A Sustainable Solution for Seed Protection and Long-Term Grain Storage

Abstract

High-output modern agriculture based on synthetic chemicals (biocides, pesticides, and fertilizers) feeds the growing global population. To completely abandon the use of pesticides and fertilizers will undoubtedly cause a severe food crisis worldwide, and sustainable alternative solutions are urgently demanded to stop biocides and fertilizers overuse. Herein, a versatile and green strategy is proposed for seed protection and long-term storage of grains using a cellulose-based photothermal coating (PDA NPs@Cell-N+) that consists of photothermal polydopamine nanoparticles (PDA NPs) and a positive-charged cellulose derivative (Cell-N+) to eradicate seed-borne bacteria and fungi simply under infrared irradiation. In vitro and in vivo assays and the seedling-stage phenotypes of mung bean (Vigna radiata) suggest that pathogenic microbes, including the tough Aspergillus flavus (inhibition ratio >99%), can be efficiently eliminated by photothermal therapy. Thus, the seed-borne diseases of mung beans can finally be prevented. Owing to excellent solubility and biocompatibility, the PDA NPs@Cell-N+ coating can be washed off and recycled without food safety concerns. PDA NPs@Cell-N+ can be a nature-based solution for seed protection and long-term grain storage.

Self-Assembled Biofunctionalized Chitosan-Derived Nanocomposite for Long-Lasting Antibacterial Packaging at Room Temperature

“…aureus can be identified on the solid medium. The antibacterial rate of the drug can be evaluated by the change in bacterial CFU before and after drug treatment . As a result (Figure g), the antibacterial rates of ordinary CTS against E.…”

“…Finally, 100 μL diluted liquid was inoculated and spread onto an agar plate. After inoculation at 37 °C for 24 h, the antibacterial rate of each sample was obtained by calculating the colony-forming units (CFU) . All experiments were repeated three times.…”

Advances in the Design of Functional Cellulose Based Nanopesticide Delivery Systems

“…Bacteria and fungi thrive in the right temperature and humidity, and the heat could kill bacteria and fungi. Inspired by the photothermal conversion ability of polydopamine (PDA), a cellulose-based photothermal coating (PDA NPs@Cell-N + ) of seeds has been reported by Ji et al for the long-term storage and seed protection against bacteria and fungi. The coating demonstrated effective photothermal performance under the 808 nm NIR light irradiation (Figure A), resulting in the high elimination of seed-borne diseases, especially the tough Aspergillus flavus (>99% inhibition).…”

AuNPs/CNC Nanocomposite with A “Dual Dispersion” Effect for LDI‐TOF MS Analysis of Intact Proteins in NSCLC Serum Exosomes

“…[ 36 , 40 ] Recently, CNCs were used as a suitable stabilizer in the synthesis of metal nanoparticles in an aqueous medium. [ 40 , 41 , 42 ] Moreover, carboxymethyl cellulose with a high degree of carboxymethyl substitution involves pH‐sensitive interactions with AuNPs and reduced aggregation. [ 43 ] Herein, the dispersion of AuNPs in a CNC aqueous medium (AuNPs/CNC) was prepared by a one‐step method by reducing HAuCl 4 .…”