Study on the friction and wear behavior of POM/Al2O3 nanocomposites

Wear Characterizations of Polyoxymethylene (POM) Reinforced with Carbon Nanotubes (POM/CNTs) Using the Paraffin Oil Dispersion Technique

“…In the literature, several methods have been used for nanofiller dispersion to improve these properties and especially on uniform nanofiller dispersion during synthesis POM nanocomposites. For instance, Sun et al (2008) used twin-screw extruder to 2 prepare POM/Al 2 O 3 nanocomposites in order to study the effect of inorganic nanoparticles on tribological properties of POM nanocomposites [11]. Also, Leszczyńska and Pielichowski (2012) used twin-screw extruder to blend the ternary composition of POM/ thermoplastic polyurethane (TPU)/montmorillonite (OMMT) in two stages, and then studied the inference of nanofiller on the thermal stability and structure [12].…”

Polyoxymethylene Additives

“…This can be improved if sodium etched PTFE is added to the mixture POM/PTFE, because sodium etching works as a compatibilization treatment [114]. Al 2 O 3 [115] increases both friction coefficient and wear volume. MoS 2 was shown to be poorly effective even if a slight decrease in friction coefficient was observed when using nanoballs instead of microballs [116].…”

Nanocomposites of Polyoxymethylene

“…Aluminium trioxide nanoparticles themselves demonstrate a good ability to enhance mechanical strength and decrease friction coeffi cient, although an unfavorable eff ect could occur when primary nanoparticles of 10 nm undergo agglomeration to form 30-50 nm structures [85]. It was observed that the transfer fi lm under dry sliding condition is destroyed by the agglomerated abrasives residing between the friction surfaces.…”

“…On the other hand, preparing the blend with low modulus polymer, e.g., thermoplastic elastomer, is a typical method for improving the toughness but involves a compromise with demanded mechanical strength. In order to overcome the drawbacks caused by adding only an elastomer or a fi ller, various polymer/elastomer/fi ller ternary systems have been investigated to enhance the toughness and stiff ness simultaneously [85]. Ternary hybrid composites composed of POM, polyurethane (PU) and boehmite alumina nanoparticles were produced by melt blending with and without latex pre-compounding according to the scheme presented in Figure 14.27.…”