制备温敏型 PNIPAAm-MWCNT 膜及其在乳品废水中的抗污染性能评价。
Preparation of thermo-responsive PNIPAAm-MWCNT membranes and evaluation of its antifouling properties in dairy wastewater.
机构信息
Department of Applied Chemistry, Faculty of Chemistry, Bu-Ali Sina University, Hamedan 65174-38683, Iran.
Department of Applied Chemistry, Faculty of Chemistry, Bu-Ali Sina University, Hamedan 65174-38683, Iran.
出版信息
Mater Sci Eng C Mater Biol Appl. 2019 Oct;103:109779. doi: 10.1016/j.msec.2019.109779. Epub 2019 May 20.
A novel MWCNT-PNIPAAm nanocomposite membrane was developed with an excellent cleaning efficiency of thermo-responsive surface. The thermo-responsive N-isopropyle acryleamide (NIPAAm) monomer was polymerized on the surface of MWCNT via free radical polymerization. The prepared MWCNT-PNIPAAm nanocomposite was characterized by FTIR, SEM and TGA analyses. Various amounts of the prepared nanocomposite were incorporated into the membrane matrix by the physical blending method. The resultant membranes showed better surface wettability and pure water flux compared to pristine Polyethersulfone (PES) membrane. Furthermore, after filtration, the COD value of dairy wastewater was reduced to around 90% for all membranes. The thermo-responsive cleaning method was employed to investigate the cleaning efficiency of MWCNT-PNIPAAm membrane for dairy wastewater. The 99.9% flux recovery ratio was obtained for MWCNT-PNIPAAm-0.05% membranes. All these results confirmed that the presence of MWCNT-PNIPAAm nanocomposite in the membrane matrix improves the membrane hydrophilicity and antifouling properties.
开发了一种新型 MWCNT-PNIPAAm 纳米复合膜，具有优异的热响应表面清洁效率。通过自由基聚合将热响应 N-异丙基丙烯酰胺（NIPAAm）单体聚合在 MWCNT 表面上。通过傅里叶变换红外光谱（FTIR）、扫描电子显微镜（SEM）和热重分析（TGA）对制备的 MWCNT-PNIPAAm 纳米复合膜进行了表征。通过物理共混法将不同量的制备好的纳米复合材料掺入到膜基质中。与原始聚醚砜（PES）膜相比，所得膜具有更好的表面润湿性和纯水通量。此外，经过过滤后，所有膜的乳制品废水中 COD 值均降低至约 90%。采用热响应清洗方法研究了 MWCNT-PNIPAAm 膜对乳制品废水的清洁效率。MWCNT-PNIPAAm-0.05%膜的通量恢复率达到 99.9%。所有这些结果都证实了 MWCNT-PNIPAAm 纳米复合材料在膜基质中的存在提高了膜的亲水性和抗污染性能。
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