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Multifunctional wafer-scale graphene membranes for fast ultrafiltration and high permeation gas separation.


ABSTRACT: Reliable and large-scale manufacturing routes for perforated graphene membranes in separation and filtration remain challenging. We introduce two manufacturing pathways for the fabrication of highly porous, perforated graphene membranes with sub-100-nm pores, suitable for ultrafiltration and as a two-dimensional (2D) scaffold for synthesizing ultrathin, gas-selective polymers. The two complementary processes-bottom up and top down-enable perforated graphene membranes with desired layer number and allow ultrafiltration applications with liquid permeances up to 5.55 × 10-8 m3 s-1 Pa-1 m-2. Moreover, thin-film polymers fabricated via vapor-liquid interfacial polymerization on these perforated graphene membranes constitute gas-selective polyimide graphene membranes as thin as 20 nm with superior permeances. The methods of controlled, simple, and reliable graphene perforation on wafer scale along with vapor-liquid polymerization allow the expansion of current 2D membrane technology to high-performance ultrafiltration and 2D material reinforced, gas-selective thin-film polymers.

SUBMITTER: Choi K 

PROVIDER: S-EPMC6251721 | biostudies-literature | 2018 Nov

REPOSITORIES: biostudies-literature

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Multifunctional wafer-scale graphene membranes for fast ultrafiltration and high permeation gas separation.

Choi Kyoungjun K   Droudian Amirhossein A   Wyss Roman M RM   Schlichting Karl-Philipp KP   Park Hyung Gyu HG  

Science advances 20181123 11


Reliable and large-scale manufacturing routes for perforated graphene membranes in separation and filtration remain challenging. We introduce two manufacturing pathways for the fabrication of highly porous, perforated graphene membranes with sub-100-nm pores, suitable for ultrafiltration and as a two-dimensional (2D) scaffold for synthesizing ultrathin, gas-selective polymers. The two complementary processes-bottom up and top down-enable perforated graphene membranes with desired layer number an  ...[more]

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