PVA/Au纳米复合纤维的制备及表征

Preparation and characterization of PVA/Au composite nanofiber

以聚乙烯醇(PVA)为还原剂和保护剂,采用PVA还原氯金酸(HAuCl_4)制备纳米金(Au),一步法制备PVA/Au溶液,通过静电纺丝制备了PVA/Au纳米复合纤维。利用紫外可见光谱仪、透明电镜和扫描电镜对PVA/Au纳米复合纤维进行了表征。结果表明:随着HAuCl4浓度的增加,Au纳米粒子的粒径逐渐增大;HAuCl_4的浓度对纳米复合纤维的形貌影响较大,在HAuCl_4浓度较低或较高时,均可以获得直径较为均一的PVA/Au纳米复合纤维;低电导率和高粘度的PVA/Au溶液可得到纤维直径均一的纳米复合纤维。

Using polyvinyl alcohol （PVA） as a reductant and a protectant, gold （Au） nanoparticles were produced from gold chloric acid （HauCl4）, from which PVA/Au solution was prepared by one-step process and was spun into PVA/Au composite nanofiber via electrospinning process. PVA/Au composite nanofiber was characterized with ultraviolet-visible spectroscope, trans- parent electron microscope and scanning electron microscope. The results showed that the Au nanoparticle size gradually increased with the increase of HAuCl4 concentration. The HAuCl4 concentration had a great effect on the morphology of the composite nanofiber. PVA/Au composite nanofiber with uniform diameter can be obtained from PVA/Au solution with low conductivity and high viscosity at relatively high or low HAuCl4 concentration.