Title :
Structure, mechanical and bioactive behaviors of polyamide 6/hydroxyapatite nanocomposites
Author :
Li, Kai ; Tjong, Sie Chin
Author_Institution :
Dept. of Phys. & Mater. Sci., City Univ. of Hong Kong, Hong Kong, China
Abstract :
Polyamide 6 (PA6) nanocomposites filled with 2, 4, 6, 8 wt% hydroxyapatite nanorods (nHA) were compounded in Brabender extruder followed by injection molding. The effect of nHA additions on the structure, mechanical properties and in vitro bioactivities of such nanocomposties were investigated. XRD patterns showed that PA6 crystallized exclusively in the ¿-form by adding nHA. DSC analysis revealed that nHA retards the crystallization of PA6. SEM images showed that nHA dispersed uniformly in the polar PA6 matrix. Mechanical measurements demonstrated that nHA stiffen and strengthen PA6 at the expenses of tensile elongation and impact toughness. Bio-mineralization immersion and in vitro mouse osteoblast cell culture tests confirmed the excellent biocompatibility and bioactivity of PA6/nHA nanocomposites.
Keywords :
X-ray diffraction; bioceramics; biomineralisation; crystallisation; differential scanning calorimetry; elongation; filled polymers; impact strength; injection moulding; nanobiotechnology; nanocomposites; nanorods; scanning electron microscopy; tensile strength; Brabender extruder; DSC; SEM; XRD; bioactivity; biocompatibility; biomineralization immersion; crystallization; hydroxyapatite nanorods; impact toughness; in vitro mouse osteoblast cell culture; injection molding; nHA stiffen; polyamide 6 nanocomposites; tensile elongation; Biological materials; Bones; Crystallization; Implants; In vitro; Mice; Nanocomposites; Polyethylene; Surface morphology; X-ray scattering;
Conference_Titel :
Nanoelectronics Conference (INEC), 2010 3rd International
Conference_Location :
Hong Kong
Print_ISBN :
978-1-4244-3543-2
Electronic_ISBN :
978-1-4244-3544-9
DOI :
10.1109/INEC.2010.5424825
