Carbon quantum dots enabled tuning of the microphase structures of poly (ether-b-amide) membrane for CO2 separation

Fei Shi; Qianqian Tian; Jingtao Wang; Qi Wang; Feng Shi; Yifan Li; Suzana Pereira Nunes

doi:10.1021/acs.iecr.0c03432

Carbon quantum dots enabled tuning of the microphase structures of poly (ether-b-amide) membrane for CO2 separation

Fei Shi, Qianqian Tian, Jingtao Wang, Qi Wang, Feng Shi, Yifan Li, Suzana Pereira Nunes

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Abstract

In this study, molecular-level of mixed matrix membranes are prepared by incorporating two types of carbon quantum dots (QDs), polymer-like QDs (PQD) and graphene oxide QDs (GQD) into Pebax, a poly (ether-b-amide) copolymer. PQD is shown to destroy part of the intrinsic crystalline structure of Pebax as typical fillers do. By comparison, GQD has fewer functional groups and causes an interesting enhancement of the microphase separation of Pebax. The polyether domains become more segregated and more available for the selective CO2 permeation. As a result, the gas separation performance of the membranes is evidently enhanced. GQD outperforms PQD as filler and the encouraging enhancement occurs at lower loading. The membrane with 0.05 wt% GQD loading shows the optimal gas separation property while it is 1 wt% for PQD-doped membranes. A possible mechanism is tentatively proposed based on the findings of this study.

Original language	English (US)
Journal	Industrial & Engineering Chemistry Research
DOIs	https://doi.org/10.1021/acs.iecr.0c03432
State	Published - Jul 23 2020

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: The study was financially supported by National Natural Science Foundation of China (21878277), Natural Science Foundation of Henan province (182300410268), and China Postdoctoral Science Foundation (2017T100538). We also gratefully acknowledge the financial supports from China Scholarship Council and King Abdullah University of Science and Technology, as well as the instrument support from Center of Advanced Analysis & Computational Science, Zhengzhou University.

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https://repository.kaust.edu.sa/bitstream/10754/664489/1/Carbon%20quantum_acs.iecr.0c03432.pdf

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@article{0b04210e8ab84849b3b53c16ce4ccd91,

title = "Carbon quantum dots enabled tuning of the microphase structures of poly (ether-b-amide) membrane for CO2 separation",

abstract = "In this study, molecular-level of mixed matrix membranes are prepared by incorporating two types of carbon quantum dots (QDs), polymer-like QDs (PQD) and graphene oxide QDs (GQD) into Pebax, a poly (ether-b-amide) copolymer. PQD is shown to destroy part of the intrinsic crystalline structure of Pebax as typical fillers do. By comparison, GQD has fewer functional groups and causes an interesting enhancement of the microphase separation of Pebax. The polyether domains become more segregated and more available for the selective CO2 permeation. As a result, the gas separation performance of the membranes is evidently enhanced. GQD outperforms PQD as filler and the encouraging enhancement occurs at lower loading. The membrane with 0.05 wt% GQD loading shows the optimal gas separation property while it is 1 wt% for PQD-doped membranes. A possible mechanism is tentatively proposed based on the findings of this study.",

author = "Fei Shi and Qianqian Tian and Jingtao Wang and Qi Wang and Feng Shi and Yifan Li and Nunes, {Suzana Pereira}",

note = "KAUST Repository Item: Exported on 2020-10-01 Acknowledgements: The study was financially supported by National Natural Science Foundation of China (21878277), Natural Science Foundation of Henan province (182300410268), and China Postdoctoral Science Foundation (2017T100538). We also gratefully acknowledge the financial supports from China Scholarship Council and King Abdullah University of Science and Technology, as well as the instrument support from Center of Advanced Analysis & Computational Science, Zhengzhou University.",

year = "2020",

month = jul,

day = "23",

doi = "10.1021/acs.iecr.0c03432",

language = "English (US)",

journal = "Industrial & Engineering Chemistry Research",

issn = "0888-5885",

publisher = "American Chemical Society",

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TY - JOUR

T1 - Carbon quantum dots enabled tuning of the microphase structures of poly (ether-b-amide) membrane for CO2 separation

AU - Shi, Fei

AU - Tian, Qianqian

AU - Wang, Jingtao

AU - Wang, Qi

AU - Shi, Feng

AU - Li, Yifan

AU - Nunes, Suzana Pereira

N1 - KAUST Repository Item: Exported on 2020-10-01 Acknowledgements: The study was financially supported by National Natural Science Foundation of China (21878277), Natural Science Foundation of Henan province (182300410268), and China Postdoctoral Science Foundation (2017T100538). We also gratefully acknowledge the financial supports from China Scholarship Council and King Abdullah University of Science and Technology, as well as the instrument support from Center of Advanced Analysis & Computational Science, Zhengzhou University.

PY - 2020/7/23

Y1 - 2020/7/23

N2 - In this study, molecular-level of mixed matrix membranes are prepared by incorporating two types of carbon quantum dots (QDs), polymer-like QDs (PQD) and graphene oxide QDs (GQD) into Pebax, a poly (ether-b-amide) copolymer. PQD is shown to destroy part of the intrinsic crystalline structure of Pebax as typical fillers do. By comparison, GQD has fewer functional groups and causes an interesting enhancement of the microphase separation of Pebax. The polyether domains become more segregated and more available for the selective CO2 permeation. As a result, the gas separation performance of the membranes is evidently enhanced. GQD outperforms PQD as filler and the encouraging enhancement occurs at lower loading. The membrane with 0.05 wt% GQD loading shows the optimal gas separation property while it is 1 wt% for PQD-doped membranes. A possible mechanism is tentatively proposed based on the findings of this study.

AB - In this study, molecular-level of mixed matrix membranes are prepared by incorporating two types of carbon quantum dots (QDs), polymer-like QDs (PQD) and graphene oxide QDs (GQD) into Pebax, a poly (ether-b-amide) copolymer. PQD is shown to destroy part of the intrinsic crystalline structure of Pebax as typical fillers do. By comparison, GQD has fewer functional groups and causes an interesting enhancement of the microphase separation of Pebax. The polyether domains become more segregated and more available for the selective CO2 permeation. As a result, the gas separation performance of the membranes is evidently enhanced. GQD outperforms PQD as filler and the encouraging enhancement occurs at lower loading. The membrane with 0.05 wt% GQD loading shows the optimal gas separation property while it is 1 wt% for PQD-doped membranes. A possible mechanism is tentatively proposed based on the findings of this study.

UR - http://hdl.handle.net/10754/664489

UR - https://pubs.acs.org/doi/10.1021/acs.iecr.0c03432

U2 - 10.1021/acs.iecr.0c03432

DO - 10.1021/acs.iecr.0c03432

M3 - Article

SN - 0888-5885

JO - Industrial & Engineering Chemistry Research

JF - Industrial & Engineering Chemistry Research

ER -

Carbon quantum dots enabled tuning of the microphase structures of poly (ether-b-amide) membrane for CO2 separation

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