纳滤
膜
界面聚合
纳米复合材料
材料科学
化学工程
渗透
聚合物
相位反转
表面改性
单体
高分子化学
化学
纳米技术
渗透
复合材料
生物化学
工程类
作者
Yanling Liu,Junyong Zhu,Junfeng Zheng,Xiaoqi Gao,Miaomiao Tian,Xiaomao Wang,Yuefeng F. Xie,Yatao Zhang,A. Volodin,Bart Van der Bruggen
标识
DOI:10.1016/j.memsci.2020.117982
摘要
Porous organic polymers have been considered promising for the design of high performing membranes, mainly because of their superior surface area, intrinsic mesoporous structure and good polymer affinity. In this study, hierarchical o-hydroxyazo porous organic polymers (o-POPs) and piperazine (PIP) monomers were incorporated into the casting solution, followed by phase inversion to prepare PIP-containing polymeric substrates. The o-POPs modified thin film nanocomposite (TFN) membranes were fabricated by interfacial polymerization (IP) with trimesoyl chloride (TMC). The incorporated o-POPs could locally enrich PIP in substrates and impede its diffusion towards the organic interface during IP reaction through hydrogen bonding and physical obstruction, leading to the formation of a crumpled membrane surface. The enhancement of surface roughness and hydrophilicity endowed the TFN membranes with a signally elevated water permeance while maintaining a comparable solute rejection. The optimal TFN membrane with the o-POP content of 0.3 wt% displayed a remarkable water permeance of 29.6 L m−2 h−1 bar−1, a high Na2SO4 rejection of 94.9%, and an efficient removal of reactive dyes (e.g., reactive black 5 and reactive orange 16, >98.2%), which makes o-POP functionalized TFN membranes competitive for NF applications in water treatment.
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