Influence Of BaTiO3 Surface Modification On The Performance Of UHMWPE/BaTio3 Nanocomposites For Load-bearing Implant Application

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F25%3A00382425" target="_blank" >RIV/68407700:21220/25:00382425 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Influence Of BaTiO3 Surface Modification On The Performance Of UHMWPE/BaTio3 Nanocomposites For Load-bearing Implant Application

Original language description

Surface modification of fillers is an effective method that enhances interfacial interactions with the polymer matrix. This methodology is crucial for fabricating composites that exhibit improved mechanical properties and wear resistance, thus rendering the material more suitable for implantation, especially for load-bearing applications. The purpose of this study was to enhance the compatibility of barium titanate (BaTiO3) nanoparticles within an ultrahigh molecular weight polyethylene (UHMWPE) matrix by functionalising the surface with varying concentrations of (3-aminopropyl)triethoxysilane (APTES). The functionalisation has been confirmed using X-ray Photoelectron Spectroscopy (XPS), which revealed the elemental surface composition. The treated BT nanoparticles were incorporated into the UHMWPE matrix to fabricate nanocomposites using compression molding. Comprehensive testing of fabricated composites has been conducted to assess the impact of the presence of various concentrations of surface-treating agents. Tensile, flexural, impact, and hardness tests were performed to evaluate the mechanical properties of the composites. The surface properties were further examined through contact angle measurements to gauge wettability and tribological tests were performed to evaluate friction and wear behaviour. The characterization of polymer nanocomposites was conducted using differential scanning calorimetry (DSC) for thermal analysis, X-ray diffraction (XRD) for phase identification and crystallinity assessment, and scanning electron microscopy (SEM) coupled with energy-dispersive X-ray spectrometry (EDS) for detailed morphological analysis and elemental composition evaluation. Bioactivity tests were performed by immersing the composites in simulated body fluid (SBF) to investigate their ability to form hydroxyapatite, which can improve the adhesion of proteins on the surface. This mechanism can affect friction and wear, especially in limited states during implant movement. In addition, in vitro cytotoxicity tests were performed to examine the possibility of using the composite for biomedical applications. The results confirmed that the APTES-functionalized particles clearly improved the mechanical properties compared to those of the composite without modified particles.

Czech name

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Czech description

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Type

O - Miscellaneous

CEP classification

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OECD FORD branch

20505 - Composites (including laminates, reinforced plastics, cermets, combined natural and synthetic fibre fabrics; filled composites)

Project

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Continuities

S - Specificky vyzkum na vysokych skolach

Publication year

2025

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů