Effect of Single Based Binder Palm Stearin on Sintered Properties of Hydroxyapatite Scaffold

Abstract

This paper reports on the compatibility of hydroxyapatite (HAP) combined with single based binder, palm stearin for ceramic injection molding in order to obtain the best properties. The feedstock was prepared at a powder loading of 62 Vol % using 5μm fine ceramic powder of hydroxyapatite and the binders consisting of 100% of palm stearin. The specimens underwent thermal de-binding and then sintered in an electrical furnace within a temperature range from 500°C to 1000°C. The resulting exhibit promising properties which the final product produced after the sintering process was successfully tested by mechanical testing. It is proven that even the specimen only consists of single based binder can form a complex shape without collapse just like the specimen obtained by the conventional binder system. Therefore, the fabrication also is more towards green processing technology and energy conservation due to the binder used was from natural local resources and used lower processing temperature at 50°C to 70°C for mixing and injection molding.

Tribology study of hydroxyapatite (HAp) scaffold blended single based binder via rheology and mechanical properties

“…The backbone which is generally from a higher-melting-point polymer will act as support to the powder during the initial stage of the debinding process owing to problem of shape rigidity, particularly during the molding process. Currently, there is no report on the usage of a single binder for the CIM process (Abd Aziz et al , 2015). The primary objective of this research is to maximize the usage of local binder, namely, palm stearin, as binder materials which assist the powder binder mixing and the flow of the powder during injection molding.…”