Universiti Teknologi Malaysia Institutional Repository

Quinone-rich polydopamine functionalization of yttria stabilized zirconia for apatite biomineralization: the effects of coating temperature

Zain, Norhidayu Muhamad and Hussain, Rafaqat and Abdul Kadir, Mohammed Rafiq (2015) Quinone-rich polydopamine functionalization of yttria stabilized zirconia for apatite biomineralization: the effects of coating temperature. Applied Surface Science, 346 . pp. 317-328. ISSN 0169-4332

Full text not available from this repository.

Official URL: http://dx.doi.org/10.1016/j.apsusc.2015.04.007

Abstract

The use of yttria stabilized zirconia (YSZ) as biomedical implants is often offset by its bioinert nature that prevents its osseointegration to occur. Therefore, the functionalization of YSZ surface by polydopamine to facilitate the biomineralization of apatite layer on top of the coated film has incessantly been studied. In this study YSZ discs were first immersed in 2 mg/mL of stirred dopamine solution at coating temperatures between 25 and 80 °C. The specimens were then incubated for 7d in 1.5 SBF. The effect of coating temperature on the properties (chemical compositions and wettability) and the apatite mineralization on top of the generated films was investigated. It was found that at 50 °C, the specimen displayed the highest intensity of Ca 2p peak (1.55 ± 0.42 cps) with Ca/P ratio of 1.67 due to the presence of abundant quinone groups (CO). However, the hydrophilicity (40.9 ± 01.7°) was greatly improved at 60 °C accompanied by the highest film thickness of 306 nm. Therefore, it was concluded that the presence of high intensity of quinone groups (CO) in polydopamine film at elevated temperature affects the chelation of Ca2+ ions and thus enhance the growth of apatite layer on top of the functionalized YSZ surface.

Item Type:Article
Uncontrolled Keywords:mineralization, hydrophilicity
Subjects:Q Science > Q Science (General)
Divisions:Biosciences and Medical Engineering
ID Code:55167
Deposited By: Muhamad Idham Sulong
Deposited On:04 Sep 2016 00:55
Last Modified:04 Sep 2016 00:55

Repository Staff Only: item control page