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| Main Authors: | , |
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| Format: | Recurso digital |
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Zenodo
2025
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| Subjects: | |
| Online Access: | https://doi.org/10.5281/zenodo.16640214 |
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Table of Contents:
- <p>Agricultural waste valorization is a strategic approach for developing sustainable bio-based products. Coconut coir, abundantly generated in the Philippines, remains underutilized and poses environmental disposal challenges. Nanocellulose derived from such waste exhibits promising properties for agricultural applications, particularly as a carrier for biofertilizer encapsulation. This study aimed to develop and characterize nanocellulose extracted from coconut coir under a sustainable, low-cost framework, assessing its physicochemical, morphological, and chemical suitability as a carrier matrix for future nano-biofertilizer systems. Coconut coir dust underwent sequential alkaline pretreatment (5% NaOH), bleaching using commercial bleach, controlled acid hydrolysis (2M HCl or combined H₂SO₄/HCl), and ultrasonic dispersion to produce three nanocellulose samples. Colloidal properties were characterized using dynamic light scattering (DLS), zeta potential analysis, and optical tests (Tyndall effect). Morphology was evaluated via scanning electron microscopy (SEM), while chemical composition was determined by FTIR spectroscopy. The DA2-SA sample achieved nanoscale dimensions (83.4 ± 6.7 nm), with robust colloidal stability evidenced by high negative zeta potentials (−74 mV to −97 mV). SEM revealed entangled fibrillar networks (~10–20 μm widths), and FTIR confirmed high cellulose purity with dominant O–H, C–H, and C–O–C bands, minimal carbonyl signals indicating effective lignin removal. The process demonstrated feasibility using low-cost methods, supporting circular bioeconomy goals. Coconut coir can be sustainably transformed into cellulose nanomaterial with physicochemical and morphological attributes suitable for encapsulating beneficial microbes in nano-biofertilizer systems, contributing to climate-resilient and resource-efficient agriculture.</p>