Electrically conducting membranes (ECMs) have been reported to be efficient in fouling prevention and destruction of aqueous chemical compounds. In the current study, highly conductive and anodically stable composite polyaniline-carbon nanotube (PANI-CNT) ultrafiltration (UF) ECMs were fabricated through a process of electro-polymerization of aniline on a CNT substrate under acidic conditions. The resulting PANI-CNT OF ECMs were characterized by scanning electron microscopy, atomic force microscopy, a four-point conductivity probe, cyclic voltammetry, and contact angle goniometry. The utilization of the PANI-CNT material led to significant advantages, including: (1) increased electrical conductivity by nearly an order of magnitude; (2) increased surface hydrophilicity while not impacting membrane selectivity or permeability; and (3) greatly improved stability under anodic conditions. The membrane's anodic stability was evaluated in a pH-controlled aqueous environment under a-wide range of anodic potentials using a three-electrode cell. Results indicate a significantly reduced degradation rate in comparison to a CNT-poly(vinyl alcohol) ECM under high anodic potentials. Fouling experiments conducted with bovine serum albumin demonstrated the capacity of the PANI-CNT ECMs for in situ oxidative cleaning, with membrane flux restored to its initial value under an applied potential of 3 V. Additionally, a model organic compound (methylene blue) was electrochemically transformed at high efficiency (90%) in a single pass through the anodically charged ECM.
机构:
Georgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USAGeorgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USA
Benson, Jim
;
Kovalenko, Igor
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机构:
Georgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USAGeorgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USA
Kovalenko, Igor
;
Boukhalfa, Sofiane
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机构:
Georgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USAGeorgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USA
Boukhalfa, Sofiane
;
Lashmore, David
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机构:
Univ New Hampshire, Coll Engn & Phys Sci, Mat Sci Program, Durham, NH 03824 USAGeorgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USA
Lashmore, David
;
Sanghadasa, Mohan
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机构:
US Army RDECOM, Weap Dev & Integrat Directorate, Ctr Engn, Redstone Arsenal, AL 35898 USAGeorgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USA
Sanghadasa, Mohan
;
Yushin, Gleb
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Georgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USAGeorgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USA
Cui ZF, 2010, MEMBRANE TECHNOLOGY: A PRACTICAL GUIDE TO MEMBRANE TECHNOLOGY AND APPLICATIONS IN FOOD AND BIOPROCESSING, P1, DOI 10.1016/B978-1-85617-632-3.00001-X
机构:
Georgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USAGeorgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USA
Benson, Jim
;
Kovalenko, Igor
论文数: 0引用数: 0
h-index: 0
机构:
Georgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USAGeorgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USA
Kovalenko, Igor
;
Boukhalfa, Sofiane
论文数: 0引用数: 0
h-index: 0
机构:
Georgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USAGeorgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USA
Boukhalfa, Sofiane
;
Lashmore, David
论文数: 0引用数: 0
h-index: 0
机构:
Univ New Hampshire, Coll Engn & Phys Sci, Mat Sci Program, Durham, NH 03824 USAGeorgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USA
Lashmore, David
;
Sanghadasa, Mohan
论文数: 0引用数: 0
h-index: 0
机构:
US Army RDECOM, Weap Dev & Integrat Directorate, Ctr Engn, Redstone Arsenal, AL 35898 USAGeorgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USA
Sanghadasa, Mohan
;
Yushin, Gleb
论文数: 0引用数: 0
h-index: 0
机构:
Georgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USAGeorgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USA
Cui ZF, 2010, MEMBRANE TECHNOLOGY: A PRACTICAL GUIDE TO MEMBRANE TECHNOLOGY AND APPLICATIONS IN FOOD AND BIOPROCESSING, P1, DOI 10.1016/B978-1-85617-632-3.00001-X