School of Resource and Environmental Science, Wuhan University, Wuhan 430079, China.
Carbohydr Polym. 2013 Feb 15;92(2):2232-8. doi: 10.1016/j.carbpol.2012.12.004. Epub 2012 Dec 12.
Poly(vinyl alcohol) (PVA)/sodium alginate (ALG)/organic rectorite (OREC) composite nanofibrous mats are fabricated by electrospinning aqueous solutions with different mixing ratios. Both good fiber shape and three-dimensional structure of nanofibrous mats can be observed by Field Emission Scanning Electron Microscopy. Energy-dispersive X-ray spectroscopy shows the existence of OREC in the as-spun composite mats. In addition, small-angle X-ray diffraction confirms that the interlayer of OREC is intercalated by ALG/PVA chains, and the distance between OREC interlayers is increased from 4.50 to 4.74 nm. Wide angle X-ray diffraction and Fourier transform infrared spectra further verify the intercalation is between polymers and layered silicate. Moreover, the thermal gravimetric analysis shows that the addition of OREC has only a small effect on the thermal stability of composites. Furthermore, the antibacterial experiments illustrate that OREC can enhance the bacterial inhibition ability of nanofibrous mats against Escherichia coli and Staphylococcus aureus.
聚（聚乙烯醇）（PVA）/海藻酸钠（ALG）/有机累托石（OREC）复合纳米纤维垫通过静电纺丝水溶液以不同的混合比例制造。场发射扫描电子显微镜观察到纤维形状良好，纳米纤维垫具有三维结构。能量色散 X 射线能谱显示，所纺复合垫中存在 OREC。此外，小角 X 射线衍射证实 OREC 的层间由 ALG/PVA 链插层，OREC 层间距离从 4.50nm 增加到 4.74nm。广角 X 射线衍射和傅里叶变换红外光谱进一步证实了聚合物和层状硅酸盐之间的插层。此外，热重分析表明，OREC 的加入对复合材料的热稳定性影响很小。此外，抑菌实验表明，OREC 可以提高纳米纤维垫对大肠杆菌和金黄色葡萄球菌的抑菌能力。
