Interfacial Properties and Microfailure Degradation Mechanisms of Bioabsorbable Composites for Implant Materials using Micromechanical Technique and Acoustic Emission

Micromechanical시험법과 Acoustic Emission을 이용한 Implant용 생흡수성 복합재료의 계면물성과 미세파괴 분해메카니즘

The changes of interfacial properties and microfailure degradation mechanisms of bioabsorbable composites with hydrolysis were investigated using micromechanical test and acoustic emission (AE). As hydrolysis time increased, the tensile strength, the modulus and the elongation of PEA and bioactive glass fibers decreased, whereas those of chitosan fiber changed little. Interfacial shear strength (IFSS) of bioactive glass fiber/poly-L-lactide (PLLA) composite was significantly higher than that two other systems. The decreasing rate of IFSS was the fastest in bioactive glass fiber/PLLA composite, whereas that of chitosan fiber/PLLA composite was the slowest. With increasing hydrolysis time, distribution of AE amplitude was narrow, and AE energy decreased gradually.