通过真空过滤辅助功能化碳纳米管的逐层沉积的高导电性超滤膜,Industrial & Engineering Chemistry Research

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通过真空过滤辅助功能化碳纳米管的逐层沉积的高导电性超滤膜
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2017-07-21 00:00:00 , DOI: 10.1021/acs.iecr.7b00847
Farah R. Omi ₁ , Mahbuboor R. Choudhury ₁ , Nawrin Anwar ₁ , Ahmed R. Bakr ₁ , Md. Saifur Rahaman ₁

Affiliation

导电膜可以为膜污染控制提供创新的解决方案，同时保持增强的过滤性能。在这里，一种新兴的技术，即真空过滤辅助的功能化多壁碳纳米管（MWNTs）的逐层沉积，用于在聚砜（PSf）超滤膜上制备导电表面。通过氧等离子体处理，将PSf膜用含氧的带负电荷的官能团官能化。用具有胺和羧基官能化的MWNT的5、10、15和20个双层制备MWNT-PSf膜。制备的膜的特征在于膜的厚度，接触角和电导率。膜的扫描电子显微镜图像证实跨膜表面均匀的MWNT分布。大肠杆菌在较低的直流电势下（1-3 V）。此外，在电过滤过程中观察到了甲基橙的明显降解（约99％），支持了预期的膜有机结垢减少。

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Highly Conductive Ultrafiltration Membrane via Vacuum Filtration Assisted Layer-by-Layer Deposition of Functionalized Carbon Nanotubes

Conductive membranes can offer innovative solutions for membrane fouling control while maintaining enhanced filtration performance. Here, an emerging technique, vacuum filtration assisted layer-by-layer deposition of functionalized multiwalled carbon nanotubes (MWNTs), was used to prepare conductive surfaces on polysulfone (PSf) ultrafiltration membranes. PSf membranes were functionalized with oxygen-containing negatively charged functional groups through oxygen plasma treatment. MWNT-PSf membranes were prepared with 5, 10, 15, and 20 bilayers with amine- and carboxylic-functionalized MWNTs. The prepared membranes were characterized by the thickness, contact angle, and conductivity of the membranes. Scanning electron microscopy images of the membranes confirmed uniform MWNT distribution across the membrane surface. MWNT-PSf membranes exhibited slightly reduced permeability, improved selectivity, and greater conductivity with increasing number of MWNT bilayers and demonstrated almost complete inactivation of Escherichia coli at low applied DC potential (1–3 V). Furthermore, significant (around 99%) degradation of methyl orange during electrofiltration was observed, supporting an expected reduction in organic fouling of the membrane.

更新日期：2017-07-22

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