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Imidazole-Functionalized Nitrogen-Rich Mg-Al-Co3 Layered Double Hydroxide for Developing Highly Crosslinkable Epoxy With High Thermal and Mechanical Properties Publisher



Seidi F1 ; Jouyandeh M2, 3 ; Paran SMR2 ; Esmaeili A4 ; Karami Z2 ; Livi S5 ; Habibzadeh S6 ; Vahabi H3 ; Ganjali MR2, 7 ; Saeb MR3
Authors
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Authors Affiliations
  1. 1. Provincial Key Lab of Pulp and Paper Science and Technology and Joint International Research Lab of Lignocellulosic Functional Materials, Nanjing Forestry University, Nanjing, 210037, China
  2. 2. Center of Excellence in Electrochemistry, School of Chemistry, College of Science, University of Tehran, Iran
  3. 3. Universite de Lorraine, CentraleSupelec, LMOPS, Metz, F-57000, France
  4. 4. Department of Chemical Engineering, School of Engineering Technology and Industrial Trades, College of the North Atlantic—Qatar, Arab League St, Doha, 24449, Qatar
  5. 5. Univ Lyon, INSA Lyon, CNRS, IMP UMR 5223, Villeurbanne, F-69621, France
  6. 6. Department of Chemical Engineering, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran
  7. 7. Biosensor Research Center, Endocrinology and Metabolism Molecular-Cellular Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran

Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects Published:2021


Abstract

Ionic liquid-based N-octadecyl-N'-octadecyl imidazolium iodide functionalized layered double hydroxide (LDH-IM) was synthesized for manufacturing high-performance epoxy nanocomposites. Nonisothermal differential scanning calorimetry (DSC) was performed to study cure kinetics of epoxy reinforced قث with LDH and LDH-IM. Incorporation of Mg-Al-CO3 LDH into epoxy hindered the curing reaction, as detected by dimensionless Cure Index (CI). By contrast, epoxy/LDH-IM cured Good and Excellent due to imidazolium ionic liquid. Higher activation energy for completely cured epoxy/LDH-IM nanocomposite was obtained compared to epoxy and epoxy/LDH nanocomposites. The curing reaction rate was obtained by calculation of the orders of instantaneous autocatalytic and non-catalytic reactions, and optimal kinetic parameters based on isoconversional methods were in good agreement with experimental cure reaction rates. Lower value of Tg for epoxy/LDH nanocomposite compared to the neat epoxy signified weak interactions between Mg-Al-CO3-LDH and epoxy matrix, while a higher Tg was obtained for epoxy/LDH-IM. Network degradation kinetics of the samples was also investigated. The higher decomposition activation energy for epoxy/LDH-IM approved strong interfacial adhesion in the assigned system. The highly reactive nature of the developed LDH-IM gives reason for its usage for developing highly curable epoxy with high thermal and mechanical properties. © 2020 Elsevier B.V.
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