Highly water-selective membranes based on hollow covalent organic frameworks with fast transport pathways

doi:10.1016/j.memsci.2018.08.043

	Highly water-selective membranes based on hollow covalent organic frameworks with fast transport pathways
	Cheng, XX; Liu, GH; Wu, H; Pan, FS; Cheng, XP; Yang, H; Song, YM; Cao, XZ; Jiang, ZY; Cao XZ(曹兴忠)
刊名	JOURNAL OF MEMBRANE SCIENCE
	2018
卷号	565 页码:331-341
关键词	Covalent organic frameworks Hollow structures, Hybrid membranes Ethanol dehydration Water-selective permeation
ISSN号	0376-7388
DOI	10.1016/j.memsci.2018.08.043
文献子类	Article
英文摘要	Covalent organic frameworks (COFs) are attractive candidates for membrane separation owing to their well-ordered channels and facilely tailored functionalities. However, the development of COF-based membranes remains in its infancy. To establish novel hierarchical structures in COFs, in this study, a facile template-directed approach is exploited for constructing hollow COF nanospheres. An imine-linked COF TpBD, derived from 1,3,5-triformylphloroglucinol (Tp) and benzidine (BD), was selected as the building block due to its rich hydrophilic groups and high stability. The synthesized hollow TpBD (H-TpBD) nanospheres were introduced into sodium alginate (SA) matrices to fabricate water-selective hybrid membranes. The H-TpBD nanospheres confer the membranes rapid diffusion pathways and abundant interacting sites for water molecules, thus fast water-selective permeation through the membranes was achieved. The hybrid membranes exhibit the optimal performance with permeation flux of 2170 g m(-2) h(-1) and separation factor of 2099 when used for dehydrating 90 wt % ethanol aqueous solution at 76 degrees C. The effects of hollow structures of H-TpBD on membrane performance were investigated and the molecular transport mechanisms through the membranes were elucidated. Besides, the favorable compatibility between SA and H-TpBD endows the hybrid membranes with long-term stability.
电子版国际标准刊号	1873-3123
WOS关键词	MIXED-MATRIX MEMBRANES ; COMPOSITE MEMBRANES ; SODIUM ALGINATE ; HYBRID MEMBRANE ; PERVAPORATION PERFORMANCE ; CARBON NANOTUBES ; DEHYDRATION ; SEPARATION ; MICROSPHERES ; CRYSTALLINE
WOS研究方向	Engineering ; Polymer Science
语种	英语
WOS记录号	WOS:000444090600033
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/286311]
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	Cheng, XX,Liu, GH,Wu, H,et al. Highly water-selective membranes based on hollow covalent organic frameworks with fast transport pathways[J]. JOURNAL OF MEMBRANE SCIENCE,2018,565:331-341.
APA	Cheng, XX.,Liu, GH.,Wu, H.,Pan, FS.,Cheng, XP.,...&曹兴忠.(2018).Highly water-selective membranes based on hollow covalent organic frameworks with fast transport pathways.JOURNAL OF MEMBRANE SCIENCE,565,331-341.
MLA	Cheng, XX,et al."Highly water-selective membranes based on hollow covalent organic frameworks with fast transport pathways".JOURNAL OF MEMBRANE SCIENCE 565(2018):331-341.