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用静电纺丝技术成功制备了纺丝液中铈浓度为0.1mol/L的有机-无机复合纳米纤维PVP/(NH4)2Ce(NO3)6,并优化了制备工艺。实验结果表明,复合纳米纤维随着铈含量的增大单位长度上的电压值升高,推进设备的推进速度降低;静电纺丝液中加入一定浓度的乙酸,将溶胶凝胶体系的pH控制在1.5～2.5可以明显提高纺丝液的可纺性。复合纤维的平均直径随着铈浓度的提高而增大:铈浓度为0.005mol/L时纤维平均直径为366nm,铈浓度为0.1mol/L时纤维平均直径为415nm;XRD结果表明复合纤维中铈盐为非结晶态。紫外可见分光光度仪检测结果显示,PVP/(NH4)2Ce(NO3)6静电纺丝制得的纳米纤维薄膜具有较好的可见光透过性与较强的紫外光吸收性能。
The organic-inorganic composite nanofibers PVP / (NH4) 2Ce (NO3) 6 with a cerium concentration of 0.1 mol / L in the spinning solution was successfully prepared by electrospinning technology and the preparation process was optimized. The experimental results show that with the increase of cerium content, the voltage value per unit length of the composite nanofibers increases and the propulsion speed of the propulsion equipment decreases. A certain concentration of acetic acid is added to the electrospinning solution to control the pH of the sol-gel system at 1.5 ~ 2.5 can significantly improve spinnability spinning solution. The average diameter of composite fibers increased with the increase of cerium concentration: the average fiber diameter was 366nm when the concentration of cerium was 0.005mol / L, and the average diameter of the fiber was 415nm when the concentration of cerium was 0.1mol / L. The XRD results showed that the average diameter of cerium Salt is amorphous. The results of UV-Vis spectrophotometer showed that the nanofiber films prepared by electrospinning of PVP / (NH4) 2Ce (NO3) 6 have better visible light transmission and stronger ultraviolet absorption.