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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2026-06-12 0:10 |
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Conference: Bucharest University Faculty of Physics 2026 Meeting
Section: Polymer Physics
Title:
Poly(vinyl alcohol)–Functionalized Hydroxyapatite with Enhanced Structural and Adsorptive Performance
Authors:
Simona Liliana Iconaru (1), Carmen Steluta Ciobanu (1), Liliana Ghegoiu (1,2), Daniela Predoi (1,*)
Affiliation:
1.National Institute of Materials Physics, Atomistilor Street, No. 405A, 077125 Magurele, Romania;simonaiconaru@gmail.com (S.L.I.); dpredoi@gmail.com(D.P.); ciobanucs@gmail.com (C.S.C.); ghegoiuliliana@gmail.com (L.G.);
2.Department of Mechanics, University Politehnica of Bucharest, BN 002, 313 SplaiulIndependentei, Sector 6, 060042 Bucharest, Romania;
Correspondence: dpredoi@gmail.com (D.P.)
E-mail
dpredoi@gmail.com
Keywords:
Poly(vinyl alcohol), hydroxyapatite matrix, biocompatibility
Abstract:
Poly(vinyl alcohol) coated hydroxyapatite (HAp PVA) composites were synthesized using an adapted co precipitation method to evaluate how biopolymer incorporation influences their structural, textural, and adsorption properties. The synthesis conditions enabled the homogeneous integration of PVA within the hydroxyapatite matrix without disrupting phase purity. Rietveld refinement confirmed that the hexagonal apatite lattice remained structurally intact upon PVA addition, while subtle modifications in crystal growth behavior were observed. In particular, the HAp PVA sample exhibited an increase in crystallite size, indicating that PVA provides a more regulated nucleation and growth environment that promotes the formation of well defined crystalline domains. Textural analysis revealed that gelatin reduces the population of small mesopores-reflected in a lower specific surface area—while simultaneously generating larger interparticle voids and decreasing total pore volume, consistent with partial pore filling and microstructural reorganization.
The adsorption performance of the materials was evaluated using lead ions as pollutants. Across all experimental conditions, HAp PVA demonstrated superior uptake compared to HAp, attributable to an increased density of accessible active sites and enhanced surface functionality introduced by PVA. Thermodynamic trends indicated that PVA incorporation promotes more favorable interfacial interactions, contributing to improved adsorption efficiency and stability.
The results demonstrated that the use of PVA for the functionalization of HAp particles improves the structural organization, surface characteristics, and adsorption behavior of hydroxyapatite without modifying its fundamental crystalline structure. The HAp PVA composite emerges as a promising, environmentally relevant adsorbent for the remediation of lead ions contaminated wastewater, offering improved performance while retaining the biocompatibility and stability characteristic of hydroxyapatite based materials.
Acknowledgement:
Funding: This work is funded by the Core Program of the National Institute of Materials Physics, granted by the Romanian Ministry of Research, Innovation and Digitalization through the Project PC1- PN23080101.
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