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Progress in Color, Colorants and Coatings، جلد ۱۵، شماره ۲، صفحات ۱۵۷-۱۷۴
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عنوان انگلیسی Poly(amidoamine)-grafted Graphene Oxide/Epoxy Nanocomposite: Thermal/ Mechanical Characteristics and Viscoelastic Properties
چکیده انگلیسی مقاله As the most crucial choice in the heavy-duty protective coating industry, epoxy-based coatings suffer from insufficient toughness and impermeableness. So in this study, a reliable method that is, in turn, easy to be scaled up is designed and proposed. Through this method, a significantly toughened and mechanically improved epoxy nanocomposite film is suggested. This film is based on poly(amidoamine)-grafted (PAMAM) graphene oxide (GO). GO is synthesized and then modified through two consecutive steps; first, silane-grafted GO producing SiGO and second polyamidoamine (PAMAM)-grafted SiGO leading to HbpSiGO. FT-IR, TGA, and XRD results confirm a successful functionalization of the GO flakes. Dynamic mechanical thermal analysis (DMTA) results reveal that the nanocomposite film based on HbpSiGO possesses higher storage modulus (50 %), elevated glass transition temperature (18 %), and higher cross-linking density (237 %) compared to unfilled epoxy. According to tensile testing, HbpSiGO nanocomposite shows an increment in work of fracture (148%), elongation at break (52 %), and maximum stress (68 %) in comparison with neat epoxy.
کلیدواژه‌های انگلیسی مقاله Epoxy, Nanocomposite coating, graphene oxide, Surface modification, Mechanical properties
نویسندگان مقاله M. Ganjaee Sari |
Faculty of Nanomaterials and Nanocoatings, Institute for Color Science and Technology (ICST), Tehran, Iran

M. Rostami |
Faculty of Nanomaterials and Nanocoatings, Institute for Color Science and Technology (ICST), Tehran, Iran

S. Khamseh |
Faculty of Nanomaterials and Nanocoatings, Institute for Color Science and Technology (ICST), Tehran, Iran

نشانی اینترنتی http://pccc.icrc.ac.ir/article_81788_a650617c469eacf46e235b3ec3f3b47d.pdf
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