Abstract
The aim of this paper is to investigate the effect of the hydrolytic degradability of the modification molecules on the initial tensile strength and its hydrolytic degradation of the hybrid interface-controlled HAp/PLA composites. Here, pectin, sodium alginate, and mucin were used as the acid surface modification molecules, and chitosan, arginine (Tokyo Chemical Industry Co., Ltd.), and lysine were used as the basic surface modification molecules, under consideration with the biological affinity. In addition, o-nitrobenzyl alcohol was selected as the photodissociable protecting groups to avoid the chemical reaction between the acid and basic modification molecules. First, the FT-IR measurements for the HAp particles revealed that the surface modification of the HAp particles was successfully achieved. Then, the tensile tests were carried out after the immersion into the pseudo biological environment, for the prepared hybrid interface-controlled HAp/PLA composites. As a result, it can be suggested that the modification molecules possessing the higher water-soluble and higher hydrolytic degradability could achieve both high initial mechanical property and speedy hydrolytic degradability of the hybrid interface-controlled HAp/PLA composites.
