Poly-ether-ether-ketone (PEEK) is widely used in biomedical science because of its biocompatibility. However, the material biologically inert. Many works have showed potentiality surface modification technique to enhance biological performance, such as coating and impregnating bioactive materials into substrate. Even so, these techniques are low efficiency or inapplicable processing parts with ...

Nowadays, proton exchange membrane fuel cells (PEMFCs) are the most promising green energy conversion devices for portable and stationary applications. Traditionally, these devices were based onperfluoro-sulfonic acid electrolytes membranes, given the commercial name Nafion. Nafion is the mostused electrolyte membrane till now; because of its high electrochemical properties su...

In this study, retentive forces were compared between telescopic crowns (TSC) made with poly(ether ether ketone) (PEEK) using computer-aided design and manufacturing type 4 gold alloy the conventional method. The of TSCs evaluated by performing a pull-out test primary secondary crowns. Initial force was approximately 12 N for both PEEK TSCs. TSC 6.5 after 10,000 cycles insertion removal. reduct...

Poly-ether-ether-ketone (PEEK) is a widely used and versatile polymer. Here, we use ellipsometry to determine the wavelength-dependent optical properties of PEEK before after surface modified by plasma immersion ion implantation (PIII), technique that renders hydrophilic bio-active. Lorentz Gaussian oscillator models are fit data for extraction constants dielectric function. The effect PIII, ev...