Guangdong Key Laboratory of Membrane Materials and Membrane Separation, Guangzhou Institute of Advanced Technology, Chinese Academy of Sciences, Nansha District, Guangzhou, 511458, China.
Key Laboratory for Green Chemical Process of Ministry of Education, School of Environmental Ecology and Biological Engineering, Wuhan Institute of Technology, Wuhan, 430205, China.
Sci Rep. 2019 Aug 27;9(1):12435. doi: 10.1038/s41598-019-48908-5.
Hollow fiber composite NF membranes with improved anti-fouling property and water flux were prepared via interfacial polymerizationand layer-by-layer method using polyethylenimine (PEI), isophthaloyl dichloride (IPC), and β-cyclodextrin (β-CD). The chemical structures and the morphologies of the resultant NF membranes were characterized by attenuated total reflectance-fourier transform infrared (ATR-FTIR) spectroscopy and scanning electron microscopy (SEM). The effects of β-CD concentration on membrane morphologies, nanofiltration performances, surface hydrophilicities and anti-fouling properties were investigated. It was found that the permeate flux increased with increasing the β-CD concentration, and no decline of rejection was observed. The results showed that the introduction of β-CD improved surface hydrophilicities and anti-fouling performances of composite hollow fiber NF membranes. The water contact angles decreased from 61.3° to 23° within creasing the concentration of β-CD from 0 to 2.0 wt.%. The resultant hollow fiber composite NF membrane showed an excellent anti-fouling property with the flux recovery ratio of 97.6%, which was much better than that of the original polyamide (PA) NF membranes.
采用界面聚合法和层层自组装法，以聚乙烯亚胺（PEI）、异酞酰二氯（IPC）和β-环糊精（β-CD）为原料，制备了具有良好抗污染性能和水通量的中空纤维复合纳滤膜。通过衰减全反射傅里叶变换红外（ATR-FTIR）光谱和扫描电子显微镜（SEM）对所得纳滤膜的化学结构和形态进行了表征。考察了β-CD 浓度对膜形态、纳滤性能、表面亲水性和抗污染性能的影响。结果表明，随着β-CD 浓度的增加，渗透通量增加，而截留率没有下降。结果表明，β-CD 的引入提高了复合中空纤维纳滤膜的表面亲水性和抗污染性能。随着β-CD 浓度从 0 增加到 2.0wt%，水接触角从 61.3°降低到 23°。所得中空纤维复合纳滤膜具有优异的抗污染性能，通量恢复率达到 97.6%，明显优于原始聚酰胺（PA）纳滤膜。
