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Title: Surface Modification of a MXene by an Aminosilane Coupling Agent

Abstract

MXenes, two–dimensional (2D) transition metal carbides and/or nitrides, possess surface termination groups such as hydroxyl, oxygen, and fluorine, which are available for surface functionalization. Their surface chemistry is critical in many applications. This article reports amine functionalization of Ti 3C 2T x MXene surface with [3–(2–aminoethylamino)–propyl]trimethoxysilane (AEAPTMS). Characterization techniques such as X–ray photoelectron spectroscopy verify the success of the surface functionalization and confirm that the silane coupling agent bonds to Ti 3C 2T x surface both physically and chemically. The functionalization changes the MXene surface charge from –35 to +25 mV at neutral pH, which allows for in situ preparation of self–assembled films. Further, surface charge measurements of the functionalized MXene at different pH values show that the functionalized MXene has an isoelectric point at a pH around 10.7, and the highest reported positive surface charge of +62 mV at a pH of 2.58. Furthermore, the existence of a mixture of different orientations of AEAPTMS and the simultaneous presence of protonated and free amine groups on the surface of Ti 3C 2T x are demonstrated. As a result, the availability of free amine groups on the surface potentially permits the fabrication of crosslinked electrically conductive MXene/epoxy composites, dye adsorbents, high–performancemore » membranes, and drug carriers. Surface modifications of this type are applicable to many other MXenes.« less

Authors:
 [1];  [1];  [1];  [1];  [1];  [1]; ORCiD logo [1]
  1. Drexel Univ., Philadelphia, PA (United States)
Publication Date:
Research Org.:
Drexel Univ., Philadelphia, PA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; National Science Foundation (NSF); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1599334
Alternate Identifier(s):
OSTI ID: 1605640
Grant/Contract Number:  
[SC0018618; CBET-1804285; #DE-SC0018618]
Resource Type:
Accepted Manuscript
Journal Name:
Advanced Materials Interfaces
Additional Journal Information:
[Journal Name: Advanced Materials Interfaces]; Journal ID: ISSN 2196-7350
Publisher:
Wiley-VCH
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; aminosilane; MXene; self-assembly; surface functionalization; Ti3C2Tx

Citation Formats

Riazi, Hossein, Anayee, Mark, Hantanasirisakul, Kanit, Shamsabadi, Ahmad Arabi, Anasori, Babak, Gogotsi, Yury, and Soroush, Masoud. Surface Modification of a MXene by an Aminosilane Coupling Agent. United States: N. p., 2020. Web. doi:10.1002/admi.201902008.
Riazi, Hossein, Anayee, Mark, Hantanasirisakul, Kanit, Shamsabadi, Ahmad Arabi, Anasori, Babak, Gogotsi, Yury, & Soroush, Masoud. Surface Modification of a MXene by an Aminosilane Coupling Agent. United States. doi:10.1002/admi.201902008.
Riazi, Hossein, Anayee, Mark, Hantanasirisakul, Kanit, Shamsabadi, Ahmad Arabi, Anasori, Babak, Gogotsi, Yury, and Soroush, Masoud. Mon . "Surface Modification of a MXene by an Aminosilane Coupling Agent". United States. doi:10.1002/admi.201902008.
@article{osti_1599334,
title = {Surface Modification of a MXene by an Aminosilane Coupling Agent},
author = {Riazi, Hossein and Anayee, Mark and Hantanasirisakul, Kanit and Shamsabadi, Ahmad Arabi and Anasori, Babak and Gogotsi, Yury and Soroush, Masoud},
abstractNote = {MXenes, two–dimensional (2D) transition metal carbides and/or nitrides, possess surface termination groups such as hydroxyl, oxygen, and fluorine, which are available for surface functionalization. Their surface chemistry is critical in many applications. This article reports amine functionalization of Ti3C2Tx MXene surface with [3–(2–aminoethylamino)–propyl]trimethoxysilane (AEAPTMS). Characterization techniques such as X–ray photoelectron spectroscopy verify the success of the surface functionalization and confirm that the silane coupling agent bonds to Ti3C2Tx surface both physically and chemically. The functionalization changes the MXene surface charge from –35 to +25 mV at neutral pH, which allows for in situ preparation of self–assembled films. Further, surface charge measurements of the functionalized MXene at different pH values show that the functionalized MXene has an isoelectric point at a pH around 10.7, and the highest reported positive surface charge of +62 mV at a pH of 2.58. Furthermore, the existence of a mixture of different orientations of AEAPTMS and the simultaneous presence of protonated and free amine groups on the surface of Ti3C2Tx are demonstrated. As a result, the availability of free amine groups on the surface potentially permits the fabrication of crosslinked electrically conductive MXene/epoxy composites, dye adsorbents, high–performance membranes, and drug carriers. Surface modifications of this type are applicable to many other MXenes.},
doi = {10.1002/admi.201902008},
journal = {Advanced Materials Interfaces},
number = ,
volume = ,
place = {United States},
year = {2020},
month = {2}
}

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