title: Melt spinning of poly(lactic acid) and hydroxyapatite composite fibers: influence of the filler content on the fiber properties.
abstract: 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.
authors.affiliation: School of Engineering, University of Borås, SE-501 90 Borås, Sweden.
authors.forename: Maria
authors.initials: M
authors.lastname: Persson
authors.forename: Gabriela S
authors.initials: GS
authors.lastname: Lorite
authors.forename: Sung-Woo
authors.initials: SW
authors.lastname: Cho
authors.forename: Juha
authors.initials: J
authors.lastname: Tuukkanen
authors.forename: Mikael
authors.initials: M
authors.lastname: Skrifvars
mesh_terms: D001673:Biodegradation, Environmental; D002152:Calorimetry, Differential Scanning / Q000379:methods; D017886:Durapatite / Q000737:chemistry*; D005615:Freezing; D006358:Hot Temperature; D019344:Lactic Acid / Q000737:chemistry*; D008422:Materials Testing; D018625:Microscopy, Atomic Force / Q000379:methods; D008855:Microscopy, Electron, Scanning / Q000379:methods; D011091:Polyesters; D011108:Polymers / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared / Q000379:methods; D013314:Stress, Mechanical; D013696:Temperature; D013718:Tensile Strength; D013818:Thermogravimetry / Q000379:methods; D023822:Tissue Engineering / Q000379:methods; D014783:Viscosity
chemical_list: D011091:Polyesters; D011108:Polymers; D019344:Lactic Acid; C033616:poly(lactide); D017886:Durapatite