Structure and Properties of Imidazolium salt-based Ionic Liquid as a Functional Curing Agent for Epoxy Resin, Part II

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  • エポキシ樹脂用機能性硬化剤としてのイミダゾリウム塩系イオン液体の構造と特性（下）

Abstract

<p>Following a previous report21), this article reviews the papers on imidazolium salt-based ionic liquids (ILs) in terms of the mechanism of curing epoxy resins, and the epoxy resin curing agent with multifunctional properties. The most widely accepted curing mechanism is based on the anionic polymerization of epoxy resin by imidazole derivatives generated after the dealkylation of the imidazolium salt. The degree of dealkylation depends mainly on the nature of anion species. In addition to the dealkylation, it is proposed that the formation of N-heterocyclic carbene is involved in the curing process of epoxy resin. The imidazolium saltbased IL becomes also an effective dispersant for strongly aggregated carbon nanotubes (CNTs). The singlewalled CNT well-dispersed by the imidazolium salt-based IL is reported to dramatically reduce the conductive percolation threshold of epoxy resin/CNT composite material. Amine-terminated imidazolium salt-based ILs, which are being studied to capture CO2 as part of preventing global warming, are potentially applicable to the curing of epoxy resin and to the CNT surface treatment.</p>

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