Mechanical and Tribological Performance of Self-Cured Poly Methyl Methacrylate Reinforced by Alumina Nanowires and Zirconia Nanoparticles for Denture Applications

Abstract

Polymethyl methacrylate (PMMA) is one of the common widely accepted biomaterials in prosthetic dentistry due to its acceptable advantages, since 1937. In the present work, PMMA reinforced with Al2O3 nanowires (Al2O3 NWs) and ZrO2 nanoparticles (ZrO2 NPs) were fabricated by a self-curing method. Mechanical and tribological tests were conducted to study the effect of nanofillers on the mechanical and tribological performance of PMMA nanocomposites. Compression and microhardness tests, as mechanical tests, were accomplished to estimate the elastic modulus and microhardness number of the present nanocomposites. Also, tribological properties of unfilled PMMA and its nanocomposites were realized by pin-on-disk tester under dry sliding conditions. Wear test was conducted at room temperature under applied loads of 10, 20, 30, 40, and 50 N at a constant sliding speed and distance of 1.256 m/s and 226 m, respectively to study wear rate and coefficient of friction (COF) of the nanocomposites. Experimental results revealed that the elastic modulus, microhardness, wear rate, and COF were enhanced with increasing nanofiller content up to 0.5 and 0.7 wt. % of Al2O3 NWs and ZrO2 NPs, respectively. Also, wear rate increased with increasing applied loads up to 50 N, while COF decreased with increasing applied loads up to 40 N. Finally, specimens� worn surfaces were examined and imaged using scanning electron microscope (SEM).

An investigated organic and inorganic reinforcement as an effective economical filler of poly (methyl methacrylate) nanocomposites

“…Based on the results shown in Fig. 5 , the best parameter settings are 1.2 wt% for the DSNP filler at a normal load of 10 N. These settings are in good agreement with earlier reported results 39 , 42 , 44 . On the other hand, friction resistance decreased with the addition of the DSNP and TiO 2 NP fillers at up to 1.5 wt%.…”

Enhanced mechanical, electrical, thermal, and optical properties of poly(methyl methacrylate)/copper oxide nanocomposites for flexible optoelectronic devices via in‐situ polymerization technique

“…Soft materials are defined as polymers having hardness values lower than 65. In addition to being employed in automotive applications, soft polymeric materials offer flexible electrical uses 32,40 …”

“…In addition to being employed in automotive applications, soft polymeric materials offer flexible electrical uses. 32,40…”

Mechanical and Tribological Properties of Polymethyl Methacrylate Matrix Reinforced With Novel Hybrid Organic and Inorganic Nano-Fillers.

“…Nowadays, nanotechnology has been applied in dental applications in which various researches have been employed to overcome the mechanical performance drawbacks of denture base materials, [12]. Several researches have been focused on enhancing of PMMA properties in all curing methods by incorporation of nanofillers in its composition, [13,14]. Homogenous distribution of reinforcement material, as a filler in the nanometer scale, in PMMA, as matrix material, and interfacial interaction between them, led to improve the nanocomposites properties, [15,16].…”

“…Among these additives, ZrO2 NPs are known for their inherent suitable properties. Previous studies emphasized an enhancement of the physical and mechanical properties of PMMA/ZrO2 nanocomposite for denture base materials application, [14,22]. It was found that adding of 3-5 wt.…”