Superhydrophobic, Surfactant‐doped, Conducting Polymers for Electrochemically Reversible Adsorption of Organic Contaminants

Ren, Yinying; Lin, Zhou; Mao, Xianwen; Tian, Wenda; Van Voorhis, Troy; Hatton, T. Alan

doi:10.1002/adfm.201801466

Title: Superhydrophobic, Surfactant‐doped, Conducting Polymers for Electrochemically Reversible Adsorption of Organic Contaminants

Journal Article · Fri Jun 22 00:00:00 EDT 2018 · Advanced Functional Materials

DOI:https://doi.org/10.1002/adfm.201801466· OSTI ID:1493394

Ren, Yinying ^[1]; Lin, Zhou ^[2]; Mao, Xianwen ^[1]; Tian, Wenda ^[1]; Van Voorhis, Troy ^[2];

^[1]

Department of Chemical Engineering Massachusetts Institute of Technology 77 Massachusetts Avenue Cambridge MA 02139 USA
Department of Chemistry Massachusetts Institute of Technology 77 Massachusetts Avenue Cambridge MA 02139 USA

Abstract Polymeric adsorbents show great potential for the replacement of activated carbon for removing a wide range of toxic organic pollutants from wastewater streams since they do not suffer from costly regeneration needs and high attrition rates. Herein, an electrochemically regenerable polymeric adsorbent based on an intrinsically conducting polymer (CP), polypyrrole (PPy), doped with anionic surfactant dioctylsulfosuccinate (AOT), denoted PPy(AOT), for mitigating organic pollutants in wastewater is reported. A facile electropolymerization protocol to synthesize highly porous PPy(AOT) is developed, with an adsorption capacity of greater than 570 mg pollutant/g polymer in its superhydrophobic oxidized state. It is demonstrated that the hydrophobicity of PPy(AOT) and hence its affinity for organics can be modulated electrochemically through the re‐orientation of AOT dopants, which can be exploited to regenerate the adsorbent and use it repeatedly for multiple adsorption/desorption cycles. It also explores the interactions between the adsorbed organic molecules and the surfactant‐doped CP adsorbent using a combined density functional theory and molecular dynamics approach to elucidate the mechanism of electrochemical modulations of hydrophobicity and affinity of the material. The physicochemical insights are significant for developing broader applications of such material in drug delivery, sensing, self‐cleaning surfaces, microfluidics, and artificial muscles.

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Sponsoring Organization:: USDOE

OSTI ID:: 1493394

Journal Information:: Advanced Functional Materials, Journal Name: Advanced Functional Materials Vol. 28 Journal Issue: 32; ISSN 1616-301X

Publisher:: Wiley Blackwell (John Wiley & Sons)Copyright Statement

Country of Publication:: Germany

Language:: English

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Cited by: 27 works

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