Functionally graded membranes from nanoporous covalent organic frameworks for highly selective water permeation

doi:10.1039/c7ta09596a

	Functionally graded membranes from nanoporous covalent organic frameworks for highly selective water permeation
	Pan, FS; Cheng, XX; Xu, Z; Shi, BB; Yao, ZQ; Wu, H; Yang, H; Jiang, ZY; Liu, GH; Cao, XZ
刊名	JOURNAL OF MATERIALS CHEMISTRY A
	2018
卷号	6 期号:2 页码:583-591
ISSN号	2050-7488
DOI	10.1039/c7ta09596a
文献子类	Article
英文摘要	Natural materials are often arranged in intricate gradient architectures to implement specific functionalities. Implanting such an exquisite prototype into synthetic membranes remains a grand challenge in real-world applications. In this study, functionally graded membranes are fabricated through a surface segregation method using 2D nanoporous COF TpHZ and poly(ether sulfone) as composite building blocks. During the membrane formation, the COF nanosheets can spontaneously migrate from the membrane bulk to the membrane surface to form a gradient distribution, which can be varied by manipulating the COF addition content and phase inversion temperature. The highest COF content on the membrane surface can be up to 50.90 vol%. Due to the formation of a graded structure, the membranes are endowed with remarkably increased hydrophilicity and free volume characteristics. Accordingly, the optimized membrane exhibits a permeation flux of 2.48 kg m(-2) hr(-1) and a high separation factor of 1430, and remains robust during a stability test for 320 h, and is one of the most efficient mixed matrix membranes for water/ethanol separation. The separation factor is two orders of magnitude more than that of existing commercial membranes. The concept of functionally graded membranes can be applicable to the development of a broad range of high-performance materials.
电子版国际标准刊号	2050-7496
WOS关键词	MIXED-MATRIX MEMBRANES ; PERVAPORATION DEHYDRATION ; COMPOSITE MEMBRANES ; HYBRID MEMBRANE ; SEPARATION ; PERFORMANCE ; ULTRATHIN ; LAYER ; NANOMATERIALS ; CONSTRUCTION
WOS研究方向	Chemistry ; Energy & Fuels ; Materials Science
语种	英语
WOS记录号	WOS:000419188300030
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/285516]
专题	高能物理研究所_实验物理中心高能物理研究所_多学科研究中心
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Pan, FS,Cheng, XX,Xu, Z,et al. Functionally graded membranes from nanoporous covalent organic frameworks for highly selective water permeation[J]. JOURNAL OF MATERIALS CHEMISTRY A,2018,6(2):583-591.
APA	Pan, FS.,Cheng, XX.,Xu, Z.,Shi, BB.,Yao, ZQ.,...&曹兴忠.(2018).Functionally graded membranes from nanoporous covalent organic frameworks for highly selective water permeation.JOURNAL OF MATERIALS CHEMISTRY A,6(2),583-591.
MLA	Pan, FS,et al."Functionally graded membranes from nanoporous covalent organic frameworks for highly selective water permeation".JOURNAL OF MATERIALS CHEMISTRY A 6.2(2018):583-591.