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<p>In this study, the effect of tri-methoxy-octadecyl-silane (TMOS)-modified hydroxyapatite (HAp-Si) particles on the mechanical, thermal, and in vitro degradation properties of (PLA)/HAp composites was investigated. Composite samples containing 5&#xa0;wt% filler were prepared by melt compounding. Characterization techniques including X-ray diffraction (XRD), thermogravimetric analysis (TGA), mechanical testing, and differential scanning calorimetry (DSC) were employed. The incorporation of TMOS-modified HAp into the PLA matrix resulted in notable improvements in mechanical properties, with tensile strength, modulus, and impact strength increasing by approximately 29%, 20%, and 16%, respectively, compared to neat PLA. Furthermore, comparative analysis of untreated and surface-treated composites confirmed the beneficial role of TMOS in enhancing mechanical performance. TGA results demonstrated an increase in thermal stability of around 20&#xa0;°C for both untreated and treated composites. In vitro degradation studies in simulated body fluid revealed that TMOS-treated HAp significantly influenced the degradation behavior of the PLA matrix, promoting more controlled and sustained degradation kinetics. These findings highlight the effectiveness of TMOS surface modification in improving the physico-mechanical performance and degradation behavior of PLA/HAp composites, underscoring its potential for biomedical and tissue engineering applications.</p>

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Morphological, thermal, mechanical and in vitro degradation of PLA/Silane-modified hydroxyapatite composites

  • 期刊论文

  • 发表日期：

    2025年5月30日

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  • Nedjma Tazibt,
  • Mustapha Kaci,
  • Mohamed Ragoubi,
  • Nadjet Dehouche

摘要

In this study, the effect of tri-methoxy-octadecyl-silane (TMOS)-modified hydroxyapatite (HAp-Si) particles on the mechanical, thermal, and in vitro degradation properties of (PLA)/HAp composites was investigated. Composite samples containing 5 wt% filler were prepared by melt compounding. Characterization techniques including X-ray diffraction (XRD), thermogravimetric analysis (TGA), mechanical testing, and differential scanning calorimetry (DSC) were employed. The incorporation of TMOS-modified HAp into the PLA matrix resulted in notable improvements in mechanical properties, with tensile strength, modulus, and impact strength increasing by approximately 29%, 20%, and 16%, respectively, compared to neat PLA. Furthermore, comparative analysis of untreated and surface-treated composites confirmed the beneficial role of TMOS in enhancing mechanical performance. TGA results demonstrated an increase in thermal stability of around 20 °C for both untreated and treated composites. In vitro degradation studies in simulated body fluid revealed that TMOS-treated HAp significantly influenced the degradation behavior of the PLA matrix, promoting more controlled and sustained degradation kinetics. These findings highlight the effectiveness of TMOS surface modification in improving the physico-mechanical performance and degradation behavior of PLA/HAp composites, underscoring its potential for biomedical and tissue engineering applications.