Mechanical Properties and Wear Behavior of Polypropylene/Hydroxyapatite Nanocomposite

Al-Mutairi, Nabeel; Najim, Massar; Sabr, Ohood; Kareem, Fadhaa Atheer

doi:10.21608/ejchem.2022.111440.5067

Cited by 1 publication

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“…From the DSC analysis represented in Figure 2 , it is clear that the melting point of UHMWPE increased from 136.29°C for neat UHMWPE polymer to 145 and 144.82 for n-HA and, n-TiO 2 , respectively, for weight fraction of 4.5%. It can be noticed that the melting temperature increase with the increase (HA and TiO 2 ) in nanoparticles but the higher values was obtained in (UHMWPE/n-HA) biocomposite compared to (UHMWPE/n-TiO 2 ) biocomposite due to better compatibility [ 10 , 21 ]. This indicates that the 4.5% wt.…”

Section: Resultsmentioning

confidence: 99%

Improving the Biological Properties of UHMWPE Biocomposite for Orthopedic Applications

Kadhim

Oleiwi

Hamad

2023

International Journal of Biomaterials

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Bone plates are essential for bone fracture healing because they modify the biomechanical microenvironment at the fracture site to provide the necessary mechanical fixation for fracture fragments. The objective of this study was to determine cell availability, antibacterial activity, and wettability through a contact angle test. However, biocomposites that involve UHMWPE reinforced with n-HA and n-TiO2 particles at different fractions (0, 1.5, 2.5, 3.5, and 4.5%) and 5% from carbon and Kevlar fibers were fabricated by hot pressing technique. In vitro studies revealed good cell viability on the surface of the hybrid biocomposite even after 72 hr. The UHMEPE nanocomposite reinforced with carbon showed better cell attachment for fibroblasts than other UHMWPE nanocomposite materials reinforced with Kevlar fiber. The results of the contact angle measurements indicated that the incorporation of nanoparticles and the fiber reinforcement increased the wettability due to the hydrophilic character of nanobiocomposite, and also (UHMWPE-4.5% wt. TiO2–CF) biocomposite was the best wettability (∼48% as compared to neat UHMWPE). Antibacterial experiments involving Gram-positive bacteria, Staphylococcus aureus, confirm excellent bactericidal property for (UHMWPE-4.5% wt. TiO2–CF) biocomposite. Thermal analysis of the produced nanocomposites revealed that they had higher melting and crystallinity temperatures than pure UHMWPE.

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Section: Resultsmentioning

confidence: 99%