Poly(vinyl alcohol)/Hydrotalcite Composite Nanoflbre: Preparation and Characterization

摘要

Poly(vinyl alcohol) (PVA)/hydrotalcite (HT) composite nanofibres were prepared by electrospinning. First HT was pretreated by sodium dodecyl benzene sulphonate (SDBS) in order to improve its dispersability and stability in PVA. The morphological structure and mechanical properties of the nanofibres were investigated by scanning electron microscopy, transmission electron microscopy, X-ray diffraction analysis, Fourier transform infrared spectroscopy and appropriate mechanical tests. It is believed that because of good compatibility in weak acidic condition, PVA/HT solution could be made into nanofibres with uniform fibre diameter. The structural study showed that some of the molecular chains of PVA are inserted into HT layers, allowing HT with wider layer spacing for more PVA chains to be situated between the layers, which led to better combination of PVA and HT. Also with the treated-HT joined in, the intensity and position of crystalline absorption of PVA at 1140 cm-1 showed no noticeable change, indicating HT did not undermine the crystallization of PVA. In addition, the mechanical tests results showed that adding HT can improve tensile strength of the PVA matrix.