Covalent Organic Framework Nanosheets as Reactive Fillers To Fabricate Free-Standing Polyamide Membranes for Efficient Desalination
Mixed matrix membranes (MMMs) have been more and more broadly utilized in membrane processes. Covalent organic frameworks (COFs) hold great promise as emergent nanofillers to fabricate high performance MMMs, however, only little studies about COFs materials in MMMs have been reported where COFs are...
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| Published in | ACS applied materials & interfaces Vol. 12; no. 24; pp. 27777 - 27785 |
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| Main Authors | , , , , , , , , |
| Format | Journal Article |
| Language | English |
| Published |
United States
17.06.2020
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| Subjects | |
| Online Access | Get full text |
| ISSN | 1944-8244 1944-8252 1944-8252 |
| DOI | 10.1021/acsami.0c06417 |
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| Abstract | Mixed matrix membranes (MMMs) have been more and more broadly utilized in membrane processes. Covalent organic frameworks (COFs) hold great promise as emergent nanofillers to fabricate high performance MMMs, however, only little studies about COFs materials in MMMs have been reported where COFs are all used as non-reactive fillers. Herein, we propose using -NH2 functionalized covalent organic framework nanosheets as reactive fillers (RCON) to fabricate MMMs. RCON altered the morphology and chemistry of MMMs by controlling the diffusion rate of piperazine (PIP) through hydrogen bonding prior to interfacial polymerization (IP) process and inducing the creation of ridges in the MMMs with subsequent increase in surface area (~ 24%). RCON were chemically cross-linked to the trimesoyl chloride (TMC) through amide bonding, subsequently elevating the hydrophilicity (~ 35%) and fouling resistance of MMMs. The presence of -NH2 groups elevated the RCON-PA compatibility, ensuring the high RCON loading of 5% in the MMMs without sacrificing salt rejection. Accordingly, the PA-RCON MMMs exhibited a flux of 46.5 L. m-2. h-1. bar-1, which is 6.8 times higher than that of the pristine PA membrane, while with a high rejection rate of 93.5% for Na2SO4. |
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| AbstractList | Mixed matrix membranes (MMMs) have been increasingly utilized in membrane processes. Covalent organic frameworks (COFs) hold great promise as emergent nanofillers to fabricate high-performance MMMs; however, only few studies about COF materials in MMMs have been reported where COFs are all used as nonreactive fillers. Herein, we propose using -NH2-functionalized COF nanosheets as reactive fillers (rCON) to fabricate MMMs. rCON altered the morphology and chemistry of MMMs by controlling the diffusion rate of piperazine through hydrogen bonding prior to the interfacial polymerization process and inducing the creation of ridges in the MMMs with subsequent increase in surface area (∼24%). rCON was chemically cross-linked to the trimesoyl chloride through amide bonding, subsequently elevating the hydrophilicity (∼35%) and fouling resistance of MMMs. The presence of -NH2 groups elevated the rCON-PA compatibility, ensuring the high rCON loading of 5 wt % in the MMMs without sacrificing salt rejection. Accordingly, the PA-rCON MMMs exhibited a flux of 46.5 L m-2 h-1 bar-1, which is 6.8 times higher than that of the pristine PA membrane, with a high rejection rate of 93.5% for Na2SO4.Mixed matrix membranes (MMMs) have been increasingly utilized in membrane processes. Covalent organic frameworks (COFs) hold great promise as emergent nanofillers to fabricate high-performance MMMs; however, only few studies about COF materials in MMMs have been reported where COFs are all used as nonreactive fillers. Herein, we propose using -NH2-functionalized COF nanosheets as reactive fillers (rCON) to fabricate MMMs. rCON altered the morphology and chemistry of MMMs by controlling the diffusion rate of piperazine through hydrogen bonding prior to the interfacial polymerization process and inducing the creation of ridges in the MMMs with subsequent increase in surface area (∼24%). rCON was chemically cross-linked to the trimesoyl chloride through amide bonding, subsequently elevating the hydrophilicity (∼35%) and fouling resistance of MMMs. The presence of -NH2 groups elevated the rCON-PA compatibility, ensuring the high rCON loading of 5 wt % in the MMMs without sacrificing salt rejection. Accordingly, the PA-rCON MMMs exhibited a flux of 46.5 L m-2 h-1 bar-1, which is 6.8 times higher than that of the pristine PA membrane, with a high rejection rate of 93.5% for Na2SO4. Mixed matrix membranes (MMMs) have been more and more broadly utilized in membrane processes. Covalent organic frameworks (COFs) hold great promise as emergent nanofillers to fabricate high performance MMMs, however, only little studies about COFs materials in MMMs have been reported where COFs are all used as non-reactive fillers. Herein, we propose using -NH2 functionalized covalent organic framework nanosheets as reactive fillers (RCON) to fabricate MMMs. RCON altered the morphology and chemistry of MMMs by controlling the diffusion rate of piperazine (PIP) through hydrogen bonding prior to interfacial polymerization (IP) process and inducing the creation of ridges in the MMMs with subsequent increase in surface area (~ 24%). RCON were chemically cross-linked to the trimesoyl chloride (TMC) through amide bonding, subsequently elevating the hydrophilicity (~ 35%) and fouling resistance of MMMs. The presence of -NH2 groups elevated the RCON-PA compatibility, ensuring the high RCON loading of 5% in the MMMs without sacrificing salt rejection. Accordingly, the PA-RCON MMMs exhibited a flux of 46.5 L. m-2. h-1. bar-1, which is 6.8 times higher than that of the pristine PA membrane, while with a high rejection rate of 93.5% for Na2SO4. Mixed matrix membranes (MMMs) have been increasingly utilized in membrane processes. Covalent organic frameworks (COFs) hold great promise as emergent nanofillers to fabricate high-performance MMMs; however, only few studies about COF materials in MMMs have been reported where COFs are all used as nonreactive fillers. Herein, we propose using −NH₂-functionalized COF nanosheets as reactive fillers (rCON) to fabricate MMMs. rCON altered the morphology and chemistry of MMMs by controlling the diffusion rate of piperazine through hydrogen bonding prior to the interfacial polymerization process and inducing the creation of ridges in the MMMs with subsequent increase in surface area (∼24%). rCON was chemically cross-linked to the trimesoyl chloride through amide bonding, subsequently elevating the hydrophilicity (∼35%) and fouling resistance of MMMs. The presence of −NH₂ groups elevated the rCON–PA compatibility, ensuring the high rCON loading of 5 wt % in the MMMs without sacrificing salt rejection. Accordingly, the PA–rCON MMMs exhibited a flux of 46.5 L m–² h–¹ bar–¹, which is 6.8 times higher than that of the pristine PA membrane, with a high rejection rate of 93.5% for Na₂SO₄. |
| Author | Huang, Tong Olson, Mark. A. You, Xinda Azad, Chandra S. Jiang, Zhongyi Rahman, Ata Ur Yuan, Jinqiu Wu, Hong Khan, Niaz Ali |
| Author_xml | – sequence: 1 givenname: Niaz Ali surname: Khan fullname: Khan, Niaz Ali organization: Key Laboratory for Green Chemical Technology of Ministry of Education School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China, Institute of Chemical Sciences, University of Peshawar, Peshawar 25120, Pakistan – sequence: 2 givenname: Jinqiu surname: Yuan fullname: Yuan, Jinqiu organization: Key Laboratory for Green Chemical Technology of Ministry of Education School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China – sequence: 3 givenname: Hong orcidid: 0000-0001-6600-4459 surname: Wu fullname: Wu, Hong organization: Key Laboratory for Green Chemical Technology of Ministry of Education School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China, Tianjin Key Laboratory of Membrane Science and Desalination Technology, Tianjin University, Tianjin 300072, China – sequence: 4 givenname: Tong surname: Huang fullname: Huang, Tong organization: Key Laboratory for Green Chemical Technology of Ministry of Education School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China – sequence: 5 givenname: Xinda surname: You fullname: You, Xinda organization: Key Laboratory for Green Chemical Technology of Ministry of Education School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China – sequence: 6 givenname: Ata Ur surname: Rahman fullname: Rahman, Ata Ur organization: Institute of Chemical Sciences, University of Peshawar, Peshawar 25120, Pakistan – sequence: 7 givenname: Chandra S. surname: Azad fullname: Azad, Chandra S. organization: School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, China – sequence: 8 givenname: Mark. A. orcidid: 0000-0003-0398-5063 surname: Olson fullname: Olson, Mark. A. organization: School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, China, Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States – sequence: 9 givenname: Zhongyi orcidid: 0000-0002-2492-4094 surname: Jiang fullname: Jiang, Zhongyi organization: Key Laboratory for Green Chemical Technology of Ministry of Education School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China |
| BackLink | https://www.ncbi.nlm.nih.gov/pubmed/32420726$$D View this record in MEDLINE/PubMed |
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| Snippet | Mixed matrix membranes (MMMs) have been more and more broadly utilized in membrane processes. Covalent organic frameworks (COFs) hold great promise as emergent... Mixed matrix membranes (MMMs) have been increasingly utilized in membrane processes. Covalent organic frameworks (COFs) hold great promise as emergent... |
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| SubjectTerms | crosslinking desalination fouling hydrogen bonding hydrophilicity nanosheets organochlorine compounds piperazine polyamides polymerization sodium sulfate surface area trimesoyl chloride |
| Title | Covalent Organic Framework Nanosheets as Reactive Fillers To Fabricate Free-Standing Polyamide Membranes for Efficient Desalination |
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