High-performance starch-modified graphene oxide/epoxy nanocomposite coatings: A glimpse at cure kinetics and fracture behavior

Journal: Vol.11, No.1, Winter 2018 - Article 6   Pages :  55 Until 62

Article Code:

E. Yarahmadi: Payame Noor University - Department of Chemistry
Kh. Didehban: Payame Noor University - Department of Chemistry
M. Shabanian: Standard Resaerch Institute(SRI) - Faculty of Chemistry and Petrochemical Engineering
M.R. Saeb: Institute for Color Science and Technology - Departments of Resin and Additives

Article's abstract:

Epoxy is a versatile resin used in different fields such as coatings, colors, colorants, and composites. Adding nano-scale fillers/additives to the epoxy has valued epoxy coatings for engineering applications, and opened the time of advanced epoxy-based nanocomposite coatings. In the present work, graphene oxide GO was chemically functionalized with starch, as a natural polymer, and added to the epoxy/amine system. Differential scanning calorimetry was utilized to assess the cure kinetics of neat epoxy and its composites containing pristine and starch-functionalized GO GO-St. Cryofractured surfaces of epoxy/GO and epoxy/GO-St nanocomposites are detected by scanning electron microscopy. Overall, the results are indicative of appropriateness of surface functionalization of GO by starch for high-performance coating applications. Hindered cure observed in the case of epoxy/GO was conquered by the attachment of starch to GO; moreover, tree-like fracture was responsible for higher fracture resistance due to starch.

Epoxy Coatings; Graphene Oxide; Natural polymer; Surface functionalization; Cure kinetics

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Prof. Zahra Ranjbar
Dr. Farahnaz Nourmohammadian
Assistant Editor:
Dr. Mozhgan Hosseinnezhad
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Institute for Color Science and Technology (ICST)

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