Roughness, Wear and Thermal Analysis of UHMWPE Nanocomposites Asacetabular Cup in Hip Joint Replacement

Abstract

Reinforcement UHMWPE by nano additives represented by carbon nanotubes (CNTs) and nanohydroxyapatite (nHA) with four weight fractions (1, 2, 3 and 5%) has a vital role to the improvement of surface roughness and wear resistance of produced nanocomposites. A surface roughness of new nanocomposites was decreased with an increasing weight fraction of each additive especially with CNTs due to the larger surface area of this nanofiller compared withnHA particles that achieve lower area. The results of wear rate indicated the reduction in this rate with reinforcing and this reduction increases with an increasing weight fraction of each additive especially with nHA due to the better filling of the voids by HA particles compared with CNTs that have a hollow structure and may be left some holes in the bulk composite. The calculated volumetric rate also gave the same results as in weight loss as a function to the weight fraction of additives. The density was increased for prepared nanocomposites due to filling the pores compared with pure UHMWPE which has many holes filled by air. The increasing in density for UHMWPE/nHA composites was higher than UHMWPE/CNTs composites due to the good filling of the pores. Thermal analysis was done for prepared nanocomposites and the results gave rising in melting andcrystallinity temperature for composites compared with pure UHMWPE. Impact Factor (JCC): 7.6197 SCOPUS Indexed Journal NAAS Rating: 3.11 18. RamakoteswaraRao V, Ramanaiah N, SrinivasaRao M, Sarcar MMM, Kartheek G. Optimisation of process parameters for minimum volumetric wear rate on AA7075-TiC metal matrix composite.

Improving the Biological Properties of UHMWPE Biocomposite for Orthopedic Applications

“…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.…”

“…), carbons (carbon black, carbon fiber, carbon nanotubes, graphite), and polymers (polyurethane, phenyl p-hydroxyzoate, etc.) can improve the mechanical properties of UHMWPE composites [ 8 – 10 ]. Hydroxyapatite (HA, Ca 10 (PO 4 ) 6 (OH) 2 ), the main inorganic component of hard tissues, has a variety of applications in bone fillers and replacements due to its excellent bioactivity and osteoconductivity [ 11 ].…”

Boosting Mechanical Properties of Orthoses - Foot Ankle by Adding Carbon Nanotube Particles

“…Oleiwi et. al, [27] studied the effect of nanoparticle materials on various mechanical behavior for hip joint structure, and the mechanical behaviors investigated were, weariness; roughness and thermal effect. Oleiwi et.…”