奥斯特瓦尔德成熟
材料科学
渗透
渗透
Crystal(编程语言)
膜
晶体生长
制作
聚合物
结晶学
化学工程
扩散
金属有机骨架
纳米技术
有机化学
化学
复合材料
热力学
医学
生物化学
替代医学
病理
计算机科学
程序设计语言
工程类
物理
吸附
作者
Yunlong Wang,Yan Wang,Yutao Liu,Hong Wu,Mingang Zhao,Yanxiong Ren,Yu Pu,Wenping Li,Shaoyu Wang,Shuqing Song,Liang Xu,Guangwei He,You Han,Zhongyi Jiang
标识
DOI:10.1002/adfm.202208064
摘要
Abstract Metal–organic frameworks (MOFs) are one of the most promising membrane materials for olefin/paraffin separations. However, most of MOF membranes have a thickness over 1 µm, which greatly compromises the permeation flux. While previous studies are focused on increasing crystal nucleus density on the substrates, achieving ultrathin membrane via modulation of the crystal growth is lacking. Herein, an inhibited Ostwald ripening (IOR) strategy is proposed to fabricate ultrathin ZIF‐8 membranes, through incorporating polymer‐based inhibitors into the membrane formula to inhibit the growth process of ZIF‐8 crystals via the metal–organic coordination. The IOR process can be readily tuned by varying the functional groups, molecular weights, and concentrations of the inhibitors, enabling a facile control over the IOR degree and thus the membrane thickness. Consequently, the thickness of ZIF‐8 membranes can be dramatically reduced to 180 nm. The resulting membranes exhibit ultrahigh C 3 H 6 /C 3 H 8 separation performance with C 3 H 6 permeance of 386 GPU and C 3 H 6 /C 3 H 8 separation factor of 120. It is anticipated that this straightforward and efficient IOR strategy can open a new avenue for the fabrication of ultrathin MOF membranes to tackle many critical molecular separations.
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