| 摘要： |
Thin-film nanocomposite (TFN) membranes based on nanomaterials incorporation continue to receive tremendous attention for desalination and wastewater treatment owing to their high permeability. In this work, amino-functional mesoporous polymer nanosphere (NMPS) is selected to adjust the microstructure of polyamide active thin layer for better separation performance due to its unique properties of large mesopore (ca. 5.6 nm) and abundant functional groups. The amine groups increase the interaction of NMPS with polyamide matrix for maintaining a selective layer, keeping high rejection. The mesoporous channels of NMPS can provide preferential flow paths for water transport through the membrane, which contributes to flux increment. The optimal TFN membrane modified by NMPS exhibited water flux of 55 L m(-2) h(-1), showing a 62% improvement over the conventional polyamide thin-film composite (TFC) membrane without NMPS incorporation. Furthermore, the NaCl rejection still remained at a satisfactory level of 98.7%, comparable to TFC membrane. The incorporation of NMPS in TFN membrane paves a way to design of novel nanocomposite membrane for high-efficiency desalination. |
