Premium
Amino‐functionalization of graphene sheets and the fabrication of their nanocomposites
Author(s) -
Hu Yizhe,
Shen Jianfeng,
Li Na,
Shi Min,
Ma Hongwei,
Yan Bo,
Wang Wenbin,
Huang Weishi,
Ye Mingxin
Publication year - 2010
Publication title -
polymer composites
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.577
H-Index - 82
eISSN - 1548-0569
pISSN - 0272-8397
DOI - 10.1002/pc.20984
Subject(s) - materials science , thermogravimetric analysis , graphene , nanocomposite , surface modification , graphite oxide , dynamic light scattering , fourier transform infrared spectroscopy , graphite , composite material , transmission electron microscopy , oxide , chemical engineering , raman spectroscopy , nanotechnology , nanoparticle , optics , physics , engineering , metallurgy
Expandable graphite oxide (EGO) was functionalized with different amine groups after sequential steps as thermal expansion, oxidation, acylation, and amidation. Three types of amino‐functionalized graphenes (a‐Gphs) were prepared by exfoliating amino functionalized EGOs(a‐EGO) through controlled ultrasonication. Fourier transform infrared spectroscopy, elementary analysis, X‐ray diffraction, and thermogravimetric analysis separately confirmed the chemical structure of a‐EGO. The effect of ultrasonic power on the particle sizes of exfoliated a‐EGOs was estimated by dynamic light scattering. Single layered graphene (0.43 nm) was achieved after ultrasonicating at 500 W for 20 min, which was affirmed by the results of atomic force microscopy and transmission electron microscopy. Ultra violet–visible spectroscopy also indicates the good dispersion properties of a‐Gphs in these solvents. The thermal properties of composites are obviously increased by adding a‐Gphs and a‐EGOs as nanofillers. POLYM. COMPOS., 2010. © 2010 Society of Plastics Engineers