Enhancing Multinutrients Delivery and Seed Coating with Biodegradable Based Electrospun Nanofibre

Thangaraj, Praveen; Subbiah, Krishnamoorthy Akkana; Uthandi, Sivakumar; Amirtham, D

doi:10.29321/maj.10.000476

Cited by 3 publications

(1 citation statement)

References 22 publications

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“…Nanotechnology holds a promise to enable atom-by-atom manipulation that facilitates slow and regulated release of nutrients; thereby nutrient use efficiencies can be improved while ensuring environmental safety. Several approaches such as the use of nanozeolites, − intercalation of urea with biochar, − polymer coatings, , and encapsulation using nanofibers , were attempted and found effective in improving the nutrient use efficiencies and productivity of crops. The world’s first nanourea developed by IFFCO (Indian Farmers and Fertilizers Cooperative) was released in 2021 and widely adopted across India since then .…”

Section: Introductionmentioning

confidence: 99%

Urea–Lignin/Chitosan Nanocomposite as Slow-Release Nanofertilizer

Latha

Subramanian

Raja

et al. 2023

ACS Agric. Sci. Technol.

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Urea is a universal fertilizer, but its use efficiency hardly exceeds 30−35%, and more than 70% is lost to the environment, causing eutrophication in aquatic systems. This research focuses on encapsulating urea molecules using a ligninchitosan composite. The nanocomposite was developed as a suitable carrier for entrapping nitrogenous fertilizer. Coconut coir contains plenty of lignin, which was extracted using the organosolv process by using ethanol as a solvent. Organosolv lignin (OSL) yielded spherical lignin nanoparticles (LNPs) via the solvent displacement method. Finally, a nitrogen source was loaded into the chitosan/lignin nanocomposite fertilizer (lignorea), which consists of LNPs, chitosan, and a cross-linker. The nanocomposite was characterized using PSA, SEM, TEM, UV−vis, FTIR, and XRD. The morphology of the OSL and LNPs was examined under SEM (626 ± 40 nm) and TEM (26 ± 9 nm). The noncrystallinity of both lignin and crystallinity after entrapment in nanocomposite was validated by XRD. The specific functional group pertaining to the lignin backbone had aromatic vibrations at 1511 cm −1 (OSL) and 1507 cm −1 (LNPs), and the presence of an amide peak after loading N was observed in FTIR. The lignin samples have their corresponding spectral absorbance at 281 and 288 nm wavelengths obtained in UV−vis. The size and stability of the extracted OSL and LNPs were verified by a particle size analyzer and zeta potential, respectively. The compatibility and interactions of the developed nanofertilizer were confirmed with molecular modeling and simulation. The developed nanofertilizer has total nitrogen of 30−35% which slowly releases up to 15 days in the soil. The study clearly suggests that lignin with chitosan served as a perfect template to hold and release N in a regulated pattern that collectively contributes to improved N use efficiency.

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