Recently, Distinguished Professor Qingshan Jason Niu’s group from the Institute of Advanced Study (IAS) of Shenzhen University has published a research paper titled “Highly anions-selective polyamide nanofiltration membrane fabricated by rod-coating assisted interfacial polymerization” (J. Membr. Sci.2023, 668: 121273) in Journal of Membrane Science (impact factor: 10.53; ranked in CAS JCR Q1; TOP). Dr. Zhiyu Liu, a Post-doc at the Institute for Advanced Study (IAS) of Shenzhen University is the first author, and Prof. Qingshan Jason Niu is the sole corresponding author.
The conventional fabrication of polyamide nanofiltration membrane is based on the dip-coating method. Normally, during the dip-coating process, the number of monomers absorbed by the porous substrate is much higher than the actual requirement, which makes it difficult to control the thickness. On the other hand, the excess dosage of monomers can result in the waste of hazardous and expensive chemicals. In this work, we developed a rod-coating assisted interfacial polymerization process to prepare nanofiltration (NF) membranes.This method can significantly reduce the consumption of monomers and organic solvents, and effectively avoid the waste of hazardous and expensive chemicals.Thanks to the fewer monomer dosages, the prepared NF membranes were much thinner and looser, which significantly improved the membrane permeability. And the rod-coated membranes possessed excellent NaCl/Na2SO4selective efficiency.This study suggests that the rod-coating method is highly feasible for the preparation of polyamide NF membranes with high performance. It is reasonable to expect that this work offers a new approach to fabricating NF membranes.
This work was supported by the National Natural Science Foundation of China, the Science and Technology Department of Guangdong Province, and the Science and Technology Innovation Commission of Shenzhen. The paper is linked athttps://doi.org/10.1016/j.memsci.2022.121273.
