纳米雾化技术构筑EVOH/TiO_2–TMPS超疏水纤维膜

Nano-atomization for Construction of EVOH/TiO_2–TMPS Super-hydrophobic Fiber Membrane

利用高压静电纺丝构造聚乙烯–乙烯醇(EVOH)纤维膜,在纺丝过程中利用钛酸丁酯(TBT)–乙醇溶液通过纳米雾化原位水解制得TiO_2纳米粒子,并在成膜后利用丙基三甲氧基硅烷(TMPS)表面修饰TiO_2,通过这三种微观结构构筑方法的有机协同,制得EVOH/TiO_2–TMPS纤维膜。采用扫描电子显微镜、傅里叶变换红外光谱、紫外能谱和接触角测量仪,研究纤维膜的表面形貌、化学结构、紫外光吸收能力及疏水性能。结果表明,纳米雾化技术的复合效果显著,EVOH/TiO_2–TMPS纤维膜微结构化程度明显;TiO_2成功接枝TMPS,构造出疏水TiO_2纳米粒子;原位复合的TiO_2纳米粒子使纤维膜表现出优异的紫外光吸收能力;当TBT溶液浓度为0.1 mol/L时,EVOH/TiO_2–TMPS纤维膜的接触角达到153.4°,表明成功制备了超疏水纤维膜。

poly(ethylene-vinyl alcohol)(EVOH)fiber membrane was fabricated by high-voltage electrospinning,in the electrospinning process,nano-TiO2 was prepared by using ethanol solution of tetrabutyl titanate(TBT)through in-situ hydrolysis of nano-atomization,after forming fiber membrane,TiO2 nano-particles were modified by propyltrimethoxysilane(TMPS).Through the synergistic effects of the three micro-structure construction methods,EVOH/TiO2–TMPS fiber membrane was synthesized.The surface morphology,chemical structure,ultraviolet absorption and hydrophobic properties of the fiber membrane were studied by scanning electron microscopy,Fourier transform infrared spectroscopy,ultraviolet energy spectrum and contact angle measurement.The results show that the composite effect of nano-atomization technology is remarkable,EVOH/TiO2–TMPS fiber membrane has obvious micro-structure.TiO2 is successfully grafted with TMPS and hydrophobic nano-particles were constructed.The TiO2 nanoparticles prepared by in-situ composite method also make the fiber membrane show excellent ultraviolet absorption ability.When the concentration of TBT solution is 0.1 mol/L,the contact angle of EVOH/TiO2-TMPS fiber membrane reaches 153.4°,which indicates the super-hydrophobic fiber membrane is prepared successfully.