JMS-Tailoring nanofiltration membrane performance for highly-efficient antibiotics removal by mussel-inspired modification
作者：Xi Quan Cheng a,b , Cong Zhang a , Zhen Xing Wang a , Lu Shao
關鍵字：Nanofiltration, PDA
論文來源：期刊
發表時間：2016年
For efficiently sieving active molecules to concentrate/purify antibiotics, the pores of novel hydrophilic
polyethylene glycol (PEG) based nanofiltration (NF) membrane should be finely tailored. Herein, an effective coating layer is successfully built on the PEG based NF membrane through self-polymerization of
mussel-inspired dopamine (DA) which is confirmed by various physicochemical characterizations. Interestingly, with smaller pores, the hydrophilic PEG based membranes after coating with mussel-inspired
polydopamine can significantly increase the rejections to salts and other active molecules with only little
sacrifice of dual resistance to fouling and chlorine. Importantly, the best comprehensive antibiotics separation performance of NF membrane can be achieved by mussel-inspired dopamine modification
around 6 h. Such an advanced membrane shows the highly stable tobramycin solution flux over
46 L m
2
h
1
alongside tobramycin (TOB), clindamycin phosphate (CP) and cephalexin (CA) rejections
up to 99%, 94% and 93% with 50 ppm feed concentration under 8.0 bar, respectively. Interestingly, when
the feed concentration increases up to 800 ppm, the membrane still exhibits the high rejections to all of
antibiotics up to 90%. Therefore, coating with mussel-inspired dopamine is a highly effective way to tailor
the pores of hydrophilic PEG based NF membranes toward the excellent separation performance for
expanding membrane applications in separating negative and amphiprotic charged antibiotics