Effects of surface modification of β-CaSiO3 on electrospun poly(butylene succinate)/β-CaSiO3 composite fibers
2009; Elsevier BV; Volume: 118; Issue: 2-3 Linguagem: Inglês
10.1016/j.matchemphys.2009.08.005
ISSN1879-3312
Autores Tópico(s)Bone Tissue Engineering Materials
ResumoAbstract In this experiment, pure PBSU fibers, PBSU/12.5% β-CaSiO 3 , and PBSU/25% β-CaSiO 3 composite fibers were fabricated by electrospinning. In order to investigate the effects of surface modification of β-CaSiO 3 on composite fibers, β-CaSiO 3 nanowires were surface esterified using dodecyl alcohol. SEM micrographs showed that composite materials with modified β-CaSiO 3 have homogeneous fibrous structures similar as that of pure PBSU fibers, while the fibers containing unmodified β-CaSiO 3 were inhomogeneous and much larger in diameter, and also junctions where β-CaSiO 3 agglomerated could be found. Mechanical testing showed that with the addition of unmodified β-CaSiO 3 into PBSU matrix, the tensile strength of fibrous materials decreased obviously, and the decrease degree increased with increased β-CaSiO 3 content. However, the tensile stresses of composite materials after surface modification of β-CaSiO 3 turned back and increased about 40% compared to those containing unmodified β-CaSiO 3 . All of these results suggested surface modification of β-CaSiO 3 was an effective approach to obtain composite fibrous materials with better morphologies and enhanced mechanical properties, and this method is supposed to be feasible in other fibrous material systems.
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