渗透
纳滤
材料科学
膜
聚酰胺
界面聚合
化学工程
薄膜复合膜
纳米复合材料
图层(电子)
复合数
碳纳米管
石墨烯
纳米技术
复合材料
渗透
聚合物
反渗透
化学
单体
工程类
生物化学
作者
Pulak Sarkar,Solagna Modak,Santanu Karan
标识
DOI:10.1002/admi.202000251
摘要
Abstract The role of the nanostructured materials incorporated in the separation layer of thin‐film composite membranes is not properly understood yet, as it requires stringent salt rejection values, proper imaging of the separation layer to realize the presence of nanostructured materials, and to know the thickness of the separation layer. Here, the scalable fabrication of high flux positively charged “polyamide composite nanofiltration” membranes with an ultrathin nanofilm separation layer of ≈14 nm produced via interfacial polymerization of polyethyleneimine and trimesoyl chloride is presented. “Polyamide nanocomposite nanofiltration” membranes are fabricated with the incorporation of different porous and nonporous nanostructures (e.g., ZIF‐8, TiO 2, and Fe 2 O 3 nanoparticles, graphene oxide, multi‐walled carbon nanotube, etc.) within the nanofilm separation layer. High water permeance of 15.4 L m −2 h −1 bar −1 (an increase of 33.9% compared to the pure nanofilm) is achieved with high rejection of MgCl 2 (97.6%). Such membranes with enhanced water permeance surpass the upper bound of the permeance‐rejection of the state‐of‐the‐art positively charged nanofiltration membranes applicable for ionic and molecular separation.
科研通智能强力驱动
Strongly Powered by AbleSci AI