Fabrication of assembled membrane from malonate-functionalized graphene and evaluation of its permeation performance

The increasing number of studies on graphene membranes has indicated a great potential of graphene in separation applications. For the first time, this study demonstrates liquid permeation performance of a new graphene membrane that assembled functionalized graphene sheets. Functionalized graphene w...

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Bibliographic Details
Published inCarbon (New York) Vol. 114; pp. 519 - 525
Main Authors Le, Linh Hoang, Trinh, Dai Xuan, Trung, Nguyen Ba, Tran, Thuy Phuong Nhat, Taniike, Toshiaki
Format Journal Article
LanguageEnglish
Published New York Elsevier Ltd 01.04.2017
Elsevier BV
Subjects
Acetone
Chemical synthesis
Graphene
Graphite
Membranes
Methanol
Permeability
Permeation
Selectivity
Separation
Sheets
Solvents
Stacking
Vacuum filtration
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Summary:The increasing number of studies on graphene membranes has indicated a great potential of graphene in separation applications. For the first time, this study demonstrates liquid permeation performance of a new graphene membrane that assembled functionalized graphene sheets. Functionalized graphene was synthesized from graphene dispersion based on a Bingel reaction with diethyl bromomalonate, and employed to prepare an assembled membrane using a vacuum filtration method. Thus prepared membrane was subjected to permeation tests using four solvents (hexane, acetone, methanol and water). The chemical functionalization led to two interesting consequences: i) Even a relatively minor extent of functionalization dramatically altered the chemical selectivity of the membrane, and ii) the permeability of the membrane was greatly enhanced, which plausibly arose from the less ordered stacking of the functionalized graphene sheets as compared to the pristine ones. [Display omitted]
ISSN:0008-6223
1873-3891
DOI:10.1016/j.carbon.2016.12.029