Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Science, Changchun 130022, China; Department of Chemistry, Liaoning Key Laboratory for the Synthesis and Application of Functional Compounds, Bohai University, Jinzhou 120013, China.
Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Science, Changchun 130022, China.
J Colloid Interface Sci. 2017 Jun 15;496:391-400. doi: 10.1016/j.jcis.2017.01.054. Epub 2017 Jan 18.
In this study, a cardo poly(aryl ether ketone) ultrafiltration membrane containing an N-chloramine functional group (PEK-N-Cl membrane) was easily obtained via exposure of a cardo poly(aryl ether ketone) ultrafiltration membrane (PEK-NH membrane) to dilute sodium hypochlorite solution. The chlorination process did not harm membrane performance. In addition, the PEK-N-Cl membrane was stable in both air and water. The PEK-N-Cl membrane exhibited excellent antimicrobial properties against both Gram-negative and Gram-positive bacteria (i.e. E. coli and Bacillus subtilis, respectively). The PEK-N-Cl membrane provided 94.2% and 100% reduction of E. coli and Bacillus subtilis, respectively, within 30min of contact times. Moreover, nearly 100% of the E. coli was killed after 2h during the filtration process for the PEK-N-Cl membrane. In addition, the water flux decreased by 42% for the PEK-N-Cl membrane compared to 77.6% for the PEK-NH membrane after filtration of the E. coli solution and incubation on LB nutrient agar plate, indicating that the PEK-N-Cl membrane enhibits antifouling. Furthermore, the PEK-N-Cl membrane is recyclable via subsequent exposure to a sodium hypochlorite solution.
在这项研究中，通过将聚芳醚酮超滤膜（PEK-NH 膜）暴露于稀次氯酸钠溶液中，很容易得到含有 N-氯胺官能团的聚芳醚酮超滤膜（PEK-N-Cl 膜）。氯化过程不会损害膜性能。此外，PEK-N-Cl 膜在空气和水中均稳定。PEK-N-Cl 膜对革兰氏阴性和革兰氏阳性菌（即大肠杆菌和枯草芽孢杆菌）均表现出优异的抗菌性能。PEK-N-Cl 膜在 30 分钟的接触时间内分别提供了 94.2%和 100%的大肠杆菌和枯草芽孢杆菌减少。此外，在 PEK-N-Cl 膜的过滤过程中，经过 2 小时后，几乎 100%的大肠杆菌被杀死。此外，与 PEK-NH 膜相比，PEK-N-Cl 膜在过滤大肠杆菌溶液并在 LB 营养琼脂板上孵育后，通量下降了 42%，表明 PEK-N-Cl 膜具有抗污染性。此外，PEK-N-Cl 膜可以通过后续暴露于次氯酸钠溶液进行回收利用。
