Effect of porous structure on mechanical properties of
C/PLA/nano-HA composites scaffold
C/PLA/nano-HA composites scaffold
(1. College of Bioengineering, Chongqing University, Chongqing 400044, China;
2. College of Metallurgical and Materials Engineering, Chongqing University of Science and Technology,
Chongqing 401331, China;
3. College of Chemistry and Environment Engineering, Chongqing University of Arts and Sciences,
Chongqing 402160, China)
2. College of Metallurgical and Materials Engineering, Chongqing University of Science and Technology,
Chongqing 401331, China;
3. College of Chemistry and Environment Engineering, Chongqing University of Arts and Sciences,
Chongqing 402160, China)
Abstract: Nonporous and porous C/PLA/nano-HA composites were fabricated by the process of solvent blending and freeze-drying technique, and the effect of porous structure on the mechanical properties of C/PLA/nano-HA composites scaffold was investigated and analyzed. The results show that the effects of porous structure on the bending strength, modulus and curves of stress and strain were obvious. Compared with nonporous sample, the curves of stress and strain of porous sample show more rough, and alternative phenomenon of stress increase and stress relaxation appears. It is strongly suggested that the fracture model of C/PLA/nano-HA composites scaffold transforms from the local to global load due to the porous structure.
Key words: porous structure; mechanical properties; C/PLA/nano-HA composite