【摘要】 基于木质素磺酸钠/聚乙烯亚胺纳滤膜的可行性,制备了ZIF-67改性的木质素磺酸钠/聚乙烯亚胺复合纳滤膜。通过层层自组装技术在聚砜基膜上沉积了ZIF-67改性的聚电解质阴/阳离子层,以不同的料液Mg SO₄、CaCl₂和NaCl为分离体系来探究ZIF-67改性木质素磺酸钠/聚乙烯亚胺复合膜的分离性能,发现本研究制备的ZIF-67改性木质素磺酸钠/聚乙烯亚胺复合膜在不降低截留率的前提下,渗透通量较木质素磺酸钠/聚乙烯亚胺纳滤膜可提高到约原来的两倍。本文运用层层自组装技术制备的ZIF-67改性的新型纳滤膜,可应用于水软化领域且简便可行。更多还原

【Abstract】 Abstact: Based on the feasibility of sodium lignosulfonate/polyethyleneimine nanofiltration membrane, ZIF-67 modified sodium lignosulfonate/polyethyleneimine composite nanofiltration membrane was prepared. ZIF-67 modified polyelectrolyte anion/cation layer deposited on polysulfone-based film by layer-by-layer self-assembly technique. The separation performance of ZIF-67 modified sodium lignin sulfonate/polyethyleneimine composite membrane was investigated by using different materials MgSO4, CaCl2 and NaCl as separation system. It was found that the ZIF-67 modified sodium lignosulfonate/polyethyleneimine composite membrane prepared in this study did not reduce the rejection rate, the permeation flux is twice as high as that of the sodium lignosulfonate/polyethyleneimine nanofiltration membrane. In this paper, ZIF-67 modified new nanofiltration membrane prepared by layer-by-layer self-assembly technology can be applied to the field of water softening and is simple and feasible.更多还原