超薄金属有机框架纳米片作为柔性复合气体分离膜的装订线层,ACS Nano

当前位置： X-MOL 学术 › ACS Nano › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

超薄金属有机框架纳米片作为柔性复合气体分离膜的装订线层
ACS Nano ( IF 15.8 ) Pub Date : 2018-10-24 00:00:00 , DOI: 10.1021/acsnano.8b06811
Min Liu ₁ , Ke Xie ₁ , Mitchell D. Nothling ₁ , Paul Andrew Gurr ₁ , Shereen Siew Ling Tan ₁ , Qiang Fu ₁ , Paul A. Webley ₁ , Greg G. Qiao ₁

Affiliation

超薄金属有机框架（MOF）纳米片在各种分离应用中显示出巨大潜力。在这项研究中，将MOF纳米片作为排水沟层并入高性能，柔性的薄膜复合膜（TFCM）中，用于CO ₂分离。通过表面活性剂辅助方法制备了超薄MOF纳米片（约3-4 nm），然后通过真空过滤将其涂覆在柔性多孔载体上。这产生了超薄（约25 nm），极其平坦的MOF层，与传统的聚二甲基硅氧烷沟槽层相比，该MOF层具有较高的透气性，并且降低了气体阻力。随后将超薄MOF天沟层与聚合物选择层（聚活性）旋涂在一起，得到的TFCM表现出最好的CO ₂柔性复合膜的分离性能尚未见报道（CO ₂透过率约为2100 GPU，理想的CO ₂ / N ₂选择性约为30）。检查了几个独特的MOF纳米片作为檐槽层，每个都在结构和厚度（〜10和〜80 nm）方面有所不同，结果表明，超薄MOF层的柔韧性对于优化膜性能至关重要。与当前的复合膜设计相比，将超薄MOF纳米片包含在下一代TFCM中可能会显着改善气体分离性能。

"点击查看英文标题和摘要"

Ultrathin Metal–Organic Framework Nanosheets as a Gutter Layer for Flexible Composite Gas Separation Membranes

Ultrathin metal–organic framework (MOF) nanosheets show great potential in various separation applications. In this study, MOF nanosheets are incorporated as a gutter layer in high-performance, flexible thin-film composite membranes (TFCMs) for CO₂ separation. Ultrathin MOF nanosheets (∼3–4 nm) were prepared via a surfactant-assisted method and subsequently coated onto a flexible porous support by vacuum filtration. This produced an ultrathin (∼25 nm), extremely flat MOF layer, which serves as a highly permeable gutter with reduced gas resistance when compared with conventional polydimethylsiloxane gutter layers. Subsequent spin-coating of the ultrathin MOF gutter layer with a polymeric selective layer (Polyactive) afforded a TFCM exhibiting the best CO₂ separation performance yet reported for a flexible composite membrane (CO₂ permeance of ∼2100 GPU with a CO₂/N₂ ideal selectivity of ∼30). Several unique MOF nanosheets were examined as gutter layers, each differing with regard to structure and thickness (∼10 and ∼80 nm), with results indicating that flexibility in the ultrathin MOF layer is critical for optimized membrane performance. The inclusion of ultrathin MOF nanosheets into next-generation TFCMs has the potential for major improvements in gas separation performance over current composite membrane designs.

更新日期：2018-10-24

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11