Characterisation techniques for analysis of imidazolium-based ionic liquids and application in polymer preparation: A review

Noorhisham, Nur Athirah; Amri, Deana; Mohamed, Ahmad Husaini; Yahaya, Noorfatimah; Ahmad, Nor Monica; Mohamad, Sharifah; Sijam, Kamaruzaman; Osman, Hasnah

doi:10.1016/j.molliq.2021.115340

Cited by 55 publications

(19 citation statements)

References 173 publications

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“…As a part of the current investigation, a quantitative comparison of thermal kinetics of PEEK/MWCNT composites synthesized with different imidazolium ILs, comprising [BMIM]HSO 4 , [BMIM]Ac, [EMIM]Ac, and [EMIM]HSO 4 , was carried out, and it was noted that [BMIM]HSO 4 -based PEEK/MWCNT nanocomposites showed improved results. This argument seems particularly relevant, considering that multiple prior investigations 9,42 demonstrated that ILs characterized by a larger alkyl group can develop substantial polymerÀfiller linkages, which were crucial for increasing the MWCNT dispersion and impeding thermal decomposition. Likewise, compared to other PEEK/MWCNT composites and powerful interactions between the filler and the polymer matrix offered by the utilized IL.…”

Section: Thermal Degradation Kinetics Study Of Peek/mwcnt/il Compositesmentioning

confidence: 99%

Evaluation thermal degradation kinetics of ionic liquid assisted polyetheretherketone‐multiwalled carbon nanotubes composites

Ahmad

Mansor

Mahmood

et al. 2023

J of Applied Polymer Sci

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The incorporation of multiwalled carbon nanotubes (MWCNT) into polyetheretherketone (PEEK) composites has emerged as a promising strategy for enhancing the thermomechanical characteristics of PEEK composite materials. This study investigates the thermal behavior and kinetics prediction of PEEK/MWCNT composites comprising different ionic liquids (ILs), namely 1‐butyl‐3‐methylimidazolium hydrogen sulfate ([BMIM]HSO4), 1‐butyl‐3‐methylimidazolium acetate ([BMIM]Ac), 1‐ethyl‐3‐methylimidazolium acetate ([EMIM]Ac) and 1‐ethyl‐3‐methylimidazolium hydrogen sulfate ([EMIM]HSO4). Three non‐isothermal methods Coats‐Redfern, Broido, and Horowitz‐Metzger, were employed to model the thermal decomposition profiles of fabricated composites to calculate the activation energy. The highest decomposition temperature (580°C) was obtained for [BMIM]HSO4‐based PEEK/MWCNT composites. Moreover, a 3%–8% increase in the activation energy was obtained compared to PEEK/MWCNT manufactured without ILs. The Coats‐Redfern model was superior to Broido and Horowitz‐Metzger models in modeling the thermal degradation of developed composites, as evidenced from the higher value of the coefficient of determination (R2 ≥ 0.9899). By determining the Root Mean Square Error (RMSE) and R2 for the thermal degradation kinetics data, the artificial neural network (ANN) model was employed. The ANN model accurately predicted the mass loss curves, exhibiting R2 ≥ 0.9815 for the designed model. These findings can assist in establishing an IL‐assisted benign approach for PEEK/MWCNT/IL composites with superior thermal characteristics.

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Section: Thermal Degradation Kinetics Study Of Peek/mwcnt/il Compositesmentioning

confidence: 99%

Evaluation thermal degradation kinetics of ionic liquid assisted polyetheretherketone‐multiwalled carbon nanotubes composites

Ahmad

Mansor

Mahmood

et al. 2023

J of Applied Polymer Sci

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“…Ionic liquids (ILs) are remarkable chemical compounds, which are found to have wide applications in many areas including creating new polymer materials with unprecedented chemical and physical properties. [ 14‐18 ] Recently, ILs as promising plasticizers for brittle polymer have stimulated intensive research interest because of their highly tunable nature and exceptional properties, including low volatility, nonflammability, high‐temperature stability, etc . [ 19‐20 ] For example, ILs were investigated as “green” and nonvolatile plasticizers for several commercial polymers including polyamide (PA), poly(methyl methacrylate) (PMMA), poly(vinyl chloride) (PVC), etc .…”

Section: Background and Originality Contentmentioning

confidence: 99%

Novel Designed PEG‐Dicationic Imidazolium‐Based Ionic Liquids as Effective Plasticizers for Sustainable Polylactide

et al. 2021

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A series of novel polyethylene glycol-dicationic imidazolium-based ionic liquids (mPEG-ILs) were synthesized by facile quaternization reaction from various elaborately designed di-imidazoles and PEG, which were then studied as green plasticizers for sustainable polylactide (PLA) material. The influences of the chain structure, content, and molecular weight of the mPEG-ILs on the plasticizing effect were systematically investigated by characterization of a series of PLA/mPEG-ILs blending systems. FTIR results show there is combination of ion-dipole interaction and hydrogen bonds interaction between PLA and mPEG-ILs, which is beneficial for the compatibility. Thermal behaviors indicate that mPEG-ILs have a significant plasticizing effect on PLA. Particularly, mPEG400-amide-IM can remarkably improve the mobility of PLA chain, leading to decreased glass transition temperature (T g ) and cold crystallization temperature (T cc ) of PLA. Tensile test results show that the ductility of plasticized PLA is greatly enhanced, and its elongation at break reaches 249.4%, which is 22 times that of neat PLA.

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“…29 Owing to this ionized modification, the formed PIL-based graphene can be endowed with high chemical affinity for polar solvents, which facilitates the complete expansion of the graphene surface. 30 More importantly, the immobilization of POM anions onto graphene can be easily implemented due to the inherent anion exchange capability of PIL chains. 31 In brief, the introduction of PIL segments into the POMbased heterogeneous catalyst leads to the following advantages.…”

Section: ■ Introductionmentioning

confidence: 99%

“…As brand new kinds of ionized polymer chains, polymeric ionic liquids (PILs) retain almost all the properties of ionic liquids, such as high chemical activity and structural designability, are widely used as the ideal modifiers for better application requirements of matrix materials. − Taking imidazolium-based PILs as an example, the imidazole ring moieties in the backbone and repeating units enable them to decorate onto graphene-based nanomaterials effectively via specific cation−π complexation . Owing to this ionized modification, the formed PIL-based graphene can be endowed with high chemical affinity for polar solvents, which facilitates the complete expansion of the graphene surface . More importantly, the immobilization of POM anions onto graphene can be easily implemented due to the inherent anion exchange capability of PIL chains …”

Section: Introductionmentioning

confidence: 99%

High-Performance Integrated rGO-[Polymeric Ionic Liquid] [Heteropolyanions] for Catalytic Degradation of Azo Dyes

Zhang

et al. 2023

Langmuir

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Polymeric ionic liquid (such as poly[ViEtIm]Br)-modified reduced graphene oxide (rGO), rGO-poly[ViEtIm]Br, was nominated as an open carrier to construct a degradation platform. The large specific surface of rGO together with the anion-exchange property of poly[ViEtIm]Br terminals led to the wide growth of heteropolyanions (like [PW12O40]3–, [PMo12O40]3–, and [SiW12O40]4–), thus assembling the integrated catalyst rGO-poly[ViEtIm][heteropolyanions]. The grafted poly[ViEtIm]Br provided an anchor point to interlink the polar heteropolyanions and the nonpolar rGO substrate, endowing this graphene-based catalyst with excellent dispersibility. The adequate exposure of heteropolyanions further promoted the decolorization capability during the degradation procedure. Morphology, structure, and properties of materials were confirmed and monitored via transmission electron microscopy (TEM), Fourier-transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), ultraviolet–visible (UV–vis) spectroscopy, etc. rGO-poly[ViEtIm][PW12O40] was selected as the optimal catalyst with degradation efficiency toward methyl orange reaching 98.7% in 3 h. In addition, the excellent structural stability of the catalyst improved the decolorization efficiency, which reached 95% after recycling five times.

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Characterisation techniques for analysis of imidazolium-based ionic liquids and application in polymer preparation: A review

Cited by 55 publications

References 173 publications

Evaluation thermal degradation kinetics of ionic liquid assisted polyetheretherketone‐multiwalled carbon nanotubes composites

Evaluation thermal degradation kinetics of ionic liquid assisted polyetheretherketone‐multiwalled carbon nanotubes composites

Novel Designed PEG‐Dicationic Imidazolium‐Based Ionic Liquids as Effective Plasticizers for Sustainable Polylactide

High-Performance Integrated rGO-[Polymeric Ionic Liquid] [Heteropolyanions] for Catalytic Degradation of Azo Dyes

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