Supported Ionic Liquid Silica as Curing Agent for Epoxy Composites with Improved Mechanical and Thermal Properties

Abstract

Abstract:The present study aims to improve the mechanical properties of epoxy composite by incorporating supported ionic liquid silica (IL-silica). The IL-silica not only showed improved interfacial interaction and reinforcement, but also served as cure agent of epoxy composites. The differential scanning calorimetry analysis revealed that epoxy composites could be successfully cured with IL-silica without any routine curing agents. IL-silica/epoxy composites presented higher mechanical and thermal properties compared with epoxy composite containing un-functionalized silica (u-silica). The dynamic mechanical analysis showed that the storage modulus of composites significantly increased with the addition of IL-silica in comparison to that with added u-silica, as well as the variation of Tg parameter. The incorporation of IL-silica simultaneously enhanced the tensile strength, toughness, and thermal stability of the epoxy composites. The considerable improvements in mechanical and thermal properties are ascribed to the improved dispersion of IL-silica and the enhanced interfacial interactions between epoxy matrix and IL-silica by strong covalent bonding, which results in an effective load transfer.

Rheological and Mechanical Properties of Silica/Nitrile Butadiene Rubber Vulcanizates with Eco-Friendly Ionic Liquid

“…In particular, the migrations of silica and curatives play a vital role in the vulcanizates, which would deteriorate the mechanical, thermal and rheological properties during service. To attain good property stability, the filler–rubber interfacial interactions should be mediated crucially [ 49 , 51 ] while the general methodologies for the industry are not successful until the usage of ILs [ 43 ]. Figure 3 shows photographs of the compounds and vulcanizates after being stored at room temperature for one year.…”

Improved ionic-liquid-functionalized macroporous supports able to purify nucleic acids in one step

“…The ATR-FTIR spectra of the MP, MP-SilPrCl, and MP-SilPrMImCl supports are very similar, showing that the chemical integrity of the matrix is maintained. Moreover, an additional band at 1571 cm −1 is observed in the MP-SilPrMImCl spectrum, being attributed to the stretching vibrations of the imidazole ring skeleton [ 39 , 40 ], which therefore reinforces the success of the immobilization process.…”

Synthesis of new ionic liquid-grafted metal-oxo nanoclusters – Design of nanostructured hybrid organic-inorganic polymer networks

“…Therefore, tailoring the balance of interactions between the polymer medium, the O/I nanoparticles and the POSS®-POSS® interaction (leading to the formation of microsize aggregates) is a key issue for designing proper inorganic-rich nanostructures required for enhancements of mechanical properties [29][30][31][32][33][34][35][36] in addition to fire resistance. Recently, several groups reported significant advantages of using ionic liquids (ILs) as dispersing agents for epoxy matrices reinforced with silica nanoparticles [37,38]. These authors have shown that the introduction of ILs based on imidazolium-based cations was a promising strategy for tailoring nanocomposite morphology at the nanoscale [37,38].…”

“…Recently, several groups reported significant advantages of using ionic liquids (ILs) as dispersing agents for epoxy matrices reinforced with silica nanoparticles [37,38]. These authors have shown that the introduction of ILs based on imidazolium-based cations was a promising strategy for tailoring nanocomposite morphology at the nanoscale [37,38].…”