Mechanism-guided biomimetic calcium phosphate mineralization on agro-derived nanocellulose, chitosan, and pectin: Interfacial design rules for translation

Agro-derived polysaccharides, particularly nanocellulose, chitosan, and pectin, are emerging as sustainable, chemically programmable templates for biomimetic calcium phosphate (CaP) mineralization, yet translation-ready systems remain limited by fragmented mechanistic interpretation, inconsistent materials characterization, and poor control of process variables. Existing reviews usually address simulated body fluid screening, CaP–polymer composites, or individual polysaccharide classes separately and therefore do not explain how feedstock history, polymer critical quality attributes, and mineralization kinetics jointly determine structure, function, and reproducibility. Here, we establish a unified mechanistic–translational framework for CaP mineralization on agro-derived polysaccharide scaffolds. We show how source and purification define molecular-weight distribution, degree of acetylation or esterification, charge density, residual ash, and endotoxin burden, and how these parameters govern interfacial ion association, hydration, prenucleation complex formation, amorphous calcium phosphate stabilization, and maturation toward octacalcium phosphate, hydroxyapatite, and carbonated apatite. We further define how scaffold architecture and processing routes control mineral localization, including the shift from superficial coatings to volumetric mineralization. Finally, we propose mechanism-guided design rules and a minimum quantitative reporting set to improve reproducibility, comparability, and biomedical translation of bone-regenerative biomaterials.