静电纺聚醋酸乙烯酯/TiO_2复合纳米纤维的弯曲力学性能

Bending Properties of Electrospun Polyvinyl Acetate/TiO_2 Composite Nanofiber

结合溶胶凝胶法和静电纺丝技术制备了聚醋酸乙烯酯(PVAc)/二氧化钛(TiO2)复合纳米纤维。使用扫描电子显微镜(SEM)、透射电子显微镜(TEM)和扫描探针显微镜(SPM)对复合纳米纤维的表面形貌、内部粒子分布和单纤维弯曲弹性模量进行了表征与测试。结果表明,TiO2纳米粒子均匀地分布在PVAc纳米纤维中;随着TiO2含量的增加,纳米纤维的平均直径从585nm减少到287nm;由于TiO2溶胶分子与聚合物分子形成了较强的氢键作用使得与杂化纳米纤维的弯曲弹性模量显著增强。

Polyvinyl acetate （PVAc）/titanium dioxide（TiO2） composite nanofibers were fabricated by combining sol-gel process with electrospinning technology. The diameter distribution, surface morphology and elastic modulus of nanofibers were characterized and analyzed by scanning electron microscopy （SEM）, transmission electron microscopy （TEM） and scanning probe microscope （SPM） equipped with picoforce. The results show that TiO2 is evenly distributed on the surface of nanofibers, the average diameter of composite nanofibers decreases from 585nm to 287nm with increase of TiO2 content. The bending elastic modulus of PVAc/TiO2 nanofiber markedly increases due to the hydrogen bond formed between the TiO2 sol molecules and polymer molecules.