School of Engineering, University of Borås, SE-501 90 Borås, Sweden.
ACS Appl Mater Interfaces. 2013 Aug 14;5(15):6864-72. doi: 10.1021/am401895f. Epub 2013 Jul 12.
Composite fibers from poly(lactic acid) (PLA) and hydroxyapatite (HA) particles were prepared using melt spinning. Different loading concentrations of HA particles (i.e., 5, 10, 15, and 20 wt %) in the PLA fibers and solid-state draw ratios (SSDRs) were evaluated in order to investigate their influence on the fibers' morphology and thermal and mechanical properties. A scanning electron microscopy investigation indicated that the HA particles were homogeneously distributed in the PLA fibers. It was also revealed by atomic force microscopy and Fourier transform infrared spectroscopy that HA particles were located on the fiber surface, which is of importance for their intended application in biomedical textiles. Our results also suggest that the mechanical properties were independent of the loading concentration of the HA particles and that the SSDR played an important role in improving the mechanical properties of the composite fibers.
采用熔融纺丝法制备了聚乳酸（PLA）和羟基磷灰石（HA）颗粒的复合纤维。评估了 PLA 纤维中不同 HA 颗粒负载浓度（即 5wt%、10wt%、15wt%和 20wt%）和固态拉伸比（SSDR）对纤维形貌以及热学和力学性能的影响。扫描电子显微镜研究表明，HA 颗粒在 PLA 纤维中均匀分布。原子力显微镜和傅里叶变换红外光谱也表明，HA 颗粒位于纤维表面，这对于它们在生物医学纺织品中的预期应用非常重要。我们的研究结果还表明，力学性能与 HA 颗粒的负载浓度无关，而 SSDR 在提高复合纤维的力学性能方面起着重要作用。
