Effect of oriented fiber membrane fabricated via needleless melt electrospinning on water filtration efficiency
Effect of oriented fiber membrane fabricated via needleless melt electrospinning on water filtration efficiency
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DOI：
10.1016/j.desal.2014.04.003
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发表时间：
2014-07
期刊：
影响因子：
9.9
通讯作者：
L. Xiaohu;Zhang Youchen;Haoyi Li;Chen Hongbo;Y. Ding;Weimin Yang
中科院分区：
文献类型：
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作者：
L. Xiaohu;Zhang Youchen;Haoyi Li;Chen Hongbo;Y. Ding;Weimin Yang
本文采用无针熔体静电纺丝技术制备了取向聚丙烯纤维，在ANSYS软件的电场模拟指导下，研究了取向纤维膜的排列方式对过滤效率的影响，并结合实验研究了喷嘴到电极的距离和电场强度对纤维直径的影响。确定了与静电纺丝取向纤维的适宜距离在5 ~ 10 cm范围内，结果表明，随着滚筒转速的增加，纤维直径明显变细。表征结果表明，静电纺定向膜的平均孔径远小于静电纺随机膜，定向膜和随机膜的平均孔径分别为18.96 μm和27.29 μm。实验结果表明，静电纺丝取向膜对直径为2.49±0.418 μm的0.5 μm颗粒具有更高的过滤效率，且仍保持与天然膜基本相同的渗透通量。相邻膜的间隔角更均匀，水通量和截留比也会更大。
The oriented polypropylene fibers in this article were fabricated via the needleless melt electrospinning technique, and the influence of arrangement for oriented fiber membranes on the filtration efficiency was studied using it, guided by an electric field simulation with the software ANSYS, then combined with an experimental study to investigate the influence of the nozzle-to-electrode distance and the electrical field strength on fiber diameter. An appropriate distance to electrospun oriented fibers in the range of 5–10 cm was determined, and it was shown that the fiber diameter significantly became thinner with the increasing cylinder speed. Characterizations revealed that the mean pore size of the electrospun oriented membranes was much smaller than the electrospun random membranes, and the mean pore size of oriented membranes and random membranes was 18.96 μm and 27.29 μm, respectively. Experimental results demonstrated that electrospun oriented membranes showed higher efficiency in rejecting the 0.5 μm particles with a diameter of 2.49 ± 0.418 μm and still maintained nearly the same permeate flux as that of the native membrane. The interval angle of adjacent membranes was more uniform, and the water flux and rejection ratio would be greater.