渗透
材料科学
膜
聚二甲基硅氧烷
图层(电子)
纤维
选择性
化学工程
聚合物
纳米技术
复合材料
有机化学
渗透
化学
生物化学
工程类
催化作用
作者
Febrian Hillman,Kaiyu Wang,Can Zeng Liang,Debbie Hwee Leng Seng,Sui Zhang
标识
DOI:10.1002/adma.202305463
摘要
Thin film composite (TFC) hollow fiber membranes with ultrathin selective layer are desirable to maximize the gas permeance for practical applications. Herein, a bio-inspired strategy is proposed to fabricate sub-100-nm membranes via a tree-mimicking polymer network with amphipathic components featuring multifunctionalities. The hydrophobic polydimethylsiloxane (PDMS) brushes act as the roots that can strongly cling to the gutter layer, the PDMS crosslinkers function as the xylems to enable fast gas transport, and the hydrophilic ethylene-oxide moieties (brushes and mobile molecules) resemble tree leaves that selectively attract CO2 molecules. As a result, a ≈27 nm-thick selective layer can be attached to the hollow fiber-supported PDMS gutter layer through a simple dip-coating method without any modification. Furthermore, a CO2 permeance of ≈2700 GPU and a CO2 /N2 selectivity of ≈21 that is beyond the permeance-selectivity upper bound for hollow fiber membranes is achieved. This bio-inspired concept can potentially open the possibility of scalable hollow fiber membranes production for commercial applications in post-combustion carbon capture and beyond.
科研通智能强力驱动
Strongly Powered by AbleSci AI