气流电纺丝基夹心净化材料的制备与表征

Preparation and Characterization of Sandwich Structure Purification Material via Gas-Jet/Electrospinning Technique

纳米TiO2作为一种高效、无毒的光催化剂,在环保领域得到了广泛应用。其应用首先应考虑和解决的就是其有效负载问题。文中采用气流电纺法制备了TiO2/尼龙6(PA6)纳米复合纤维。通过X射线衍射(XRD)、扫描电镜(SEM)、透射电镜(TEM)、X射线能谱仪(EDX)和热重分析(TG)等技术手段对纤维形貌与结构进行了表征,并采用Shake Flask法对纤维抗菌性能进行了测试。结果表明,气流电纺纤维的平均直径在60 nm～65 nm之间,杀菌率最高可达99.74%。通过热压将此纤维制备成"夹心"式净化材料,其对1μm的PS微球的过滤效率可达99.50%。

Nano-TiO2 is a high efficient and no poisonous light induced catalyst,which is widely used in environment protection.If we want to put it into industrial application,it is important to immobilize it on some supporter.In this paper,TiO2/nylon-6（PA6） nanofibres were prepared via gas-jet/electrospinning technique.The micro-structures and components of the samples were characterized by XRD,SEM,TEM,X-ray energy dispersive spectrometer（EDX） and TG techniques,and antibacterial activities of the resulted fibers were tested by Shake Flask method.The results show that a fiber bearing nano-TiO2,in an average diameter from 60 nm to 65 nm was prepared,and the antibacterial efficiency of these gas-jet/electrospun nanofibers can reach 99.74%.The titled fibers can be loaded in a sandwich structure nanofiber super-cleaning material by hot-press processing,its filtration efficiency can reach 99.50% with 1 μm polystyrene microspheres as the filter media.