TypeConference
Title‘IN-VITRO’ BIOACTIVITY STUDY OF SYNTHETIC WOLLASTONITE PRODUCED FROM MALAYSIAN LIMESTONE AND SILICA SAND
SourceRTC 060
AuthorA. R. Rashita

Abstract

Wollastonite (CaO.SiO2 or CaSiO3) is an industrial mineral comprising of calcium, silicon and oxygen. Synthetic wollastonite was synthesised via solid state reaction using Malaysian limestone and silica sand. The invitro bioactivity was investigated by soaking the synthetic wollastonite pellet in simulated body fluid (SBF) solution for 1, 3, 5, 7 and 14 days at 36.5oC. XRD revealed the presence of hydroxyapatite phase as the soaking time of synthetic wollastonite pellet in SBF was increased. SEM coupled with EDX showed the formation of granules of agglomerated apatite particles on the surface of the soaked synthetic wollastonite pellet. During the formation of apatite, phosphate ions from SBF solution were consumed and this was confirmed by ICP where the concentration of the ions decreased after the soaking process. FTIR showed that the peaks for phosphate and carbonate ions increased when the apatite layer formed on the surface of synthetic wollastonite pellet. This study indicated that synthetic wollastonite produced from Malaysian limestone and silica sand was bioactive and may be used for preparation of implantable biomaterial.  


Content

RTC 060