Acid-aided epoxy-amine curing reaction as reflected in epoxy/Fe3O4 nanocomposites: Chemistry, mechanism, and fracture behavior

Jouyandeh, Maryam; Shabanian, Meisam; Khaleghi, Mahroo; Paran, Seyed Mohammad Reza; Ghiyasi, Samira; Vahabi, Henri; Formela, Krzysztof; Puglia, Debora; Saeb, Mohammad Reza

doi:10.1016/j.porgcoat.2018.09.024

Cited by 80 publications

(33 citation statements)

References 64 publications

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“…5 is single step cure kinetics, demonstrating negligibility of side reactions [57,58]. As observed, epoxy ring opening reaction starts from room temperature for heating rate of 5 ºC min -1 due to the enough time that is given to cure moieties [11,59]. Cure characteristics such as onset (Tonset), endset (Tendset) and peak (Tp) temperatures of curing reaction for neat epoxy and its nanocomposites were extracted from DSC curves and reported in Table 2.…”

Section: Nonisothermal Dsc Analysismentioning

confidence: 96%

Synthesis, characterization, and high potential of 3D metal–organic framework (MOF) nanoparticles for curing with epoxy

Jouyandeh

Tikhani

Shabanian

et al. 2020

Journal of Alloys and Compounds

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In this study, the potential of microporous 3D metal-organic framework (MOF) for curing epoxy resin has been discussed. First, MIL-101 (Cr), a chromium based MOF, was synthesized under hydrothermal condition and then characterized by using Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD) and thermogravimetric (TGA) measurements. Epoxy nanocomposites containing 0.1, 0.3 and 0.5 wt.% of MOF nanocrystals were subsequently prepared and their curability was studied in terms of the universal dimensionless Cure Index (CI) criterion under nonisothermal differential scanning calorimetry (DSC). Based on calculations made on the basis of the CI, epoxy nanocomposites containing 0.1, 0.3, and 0.5 wt.% of MOF were labeled Good and Excellent thanks to an enhanced chemical interaction between MOF and epoxy matrix, where the heat of cure in the system was surprisingly even higher than that of the neat epoxy. It was demonstrated that introduction of MOF into epoxy significantly improved the heat release during crosslinking process of epoxy, as indicated by a 63% rise in the enthalpy of cure at MOF loading of 0.1 wt.%. Addition of thermally stable MOF nanomaterials to the epoxy resin improved thermal decomposition resistance of epoxy. Up to 0.3 wt.% loading, the system revealed acceptable thermal stability at elevated temperature featured by more residue remained at the end of test, while sample containing 0.5 wt.% MOF resisted against decomposition at early stages of degradation due to higher thermal stability of MOF with respect to epoxy resin.

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Section: Nonisothermal Dsc Analysismentioning

confidence: 96%

Synthesis, characterization, and high potential of 3D metal–organic framework (MOF) nanoparticles for curing with epoxy

Jouyandeh

Tikhani

Shabanian

et al. 2020

Journal of Alloys and Compounds

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“…Designing advanced materials/systems with specific functions requires application of well‐documented criteria for optimization . Addition of additives changes thermal characteristic of polymer systems, where mathematical modeling can bring about useful insights about events taking place in molecular level . Introduction of flame‐retardant additives changes thermal stability and thermal decomposition behavior of polymers.…”

Section: Theoretical and Experimental Analysesmentioning

confidence: 99%

Triple‐faced polypropylene: Fire retardant, thermally stable, and antioxidative

Vahabi

Paran²,

Shabanian

et al. 2019

Vinyl Additive Technology

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A halogen‐free nitrogen‐rich additive was used to make polypropylene (PP) prepared for three different missions: fire retardancy, thermal stability, and antioxidative properties. The prepared additive was composed of a cyclodextrin, a nanohydroxyapatite, and a poly[[6‐[(1,1,3,3,‐tetramethylbutyl)amino]‐1,3,5‐triazine‐2,4‐diyl][(2,2,6,6‐tetramethyl‐4‐piperidinyl)imino]‐1,6‐hexanediyl[2,2,6,6‐tetramethyl‐4‐piperidinyl)imino] (SABO®STAB) integrated into a unique molecule, namely, BSDH. Fire retardancy performance of BSDH in PP was compared with that of 9,10‐dihydro‐9‐oxa‐10‐phosphaphenanthrene‐10‐oxide (DOPO) commercially available additive in terms of cone calorimeter results. Thermal stabilities of PP/BSDH and PP/DOPO composites were compared by changes observed in pyrolysis activation energy values measured in thermogravimetric analysis under nitrogen atmosphere at various heating rates. Flame retardancy of PP/BSDH composite was reflected in a drop in the peak of Heat Release Rate by ca. 31% with respect to neat PP. Very interestingly, the results show that BSDH additive retarded thermal oxidation of PP macromolecular chains when compared with DOPO commercially available flame retardant, as signaled by a rise in oxidation induction time value as well as an increased early‐stage activation energy needed for thermal decomposition of PP in the presence of BSDH. J. VINYL ADDIT. TECHNOL., 25:366–376, 2019. © 2019 Society of Plastics Engineers

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“…The reaction was carried out in a heterogeneous system, wherein NMDG is dissolved in the solution, and the GMA-grafted fabric is in the solid state. Therefore, the reaction is significantly affected by the diffusion of NMDG into the fabric and the steric structure of the reactants [ 31 , 32 ]. Acids and bases can accelerate the reaction or increase its selectivity [ 33 ].…”

Section: Introductionmentioning

confidence: 99%

Chelating Fabrics Prepared by an Organic Solvent-Free Process for Boron Removal from Water

et al. 2021

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A chelating fabric was prepared by graft polymerization of glycidyl methacrylate (GMA) onto a nonwoven fabric, followed by attachment reaction of N-methyl-D-glucamine (NMDG) using an organic solvent-free process. The graft polymerization was performed by immersing the gamma-ray pre-irradiated fabric into the GMA emulsion, while the attachment reaction was carried out by immersing the grafted fabric in the NMDG aqueous solution. The chelating capacity of the chelating fabric prepared by reaction in the NMDG aqueous solution without any additives reached 1.74 mmol/g, which further increased to above 2.0 mmol/g when surfactant and acid catalyst were added in the solution. The boron chelation of the chelating fabric was evaluated in a batch mode. Fourier transform infrared spectrophotometer (FTIR) was used to characterize the fabrics. The chelating fabric can quickly chelate boron from water to form a boron ester, and a high boron chelating ability close to 18.3 mg/g was achieved in the concentrated boron solution. The chelated boron can be eluted completely by HCl solution. The regeneration and stability of the chelating fabric were tested by 10 cycles of the chelation-elution operations. Considering the organic solvent-free preparation process and the high boron chelating performance, the chelating fabric is promising for the boron removal from water.

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Acid-aided epoxy-amine curing reaction as reflected in epoxy/Fe3O4 nanocomposites: Chemistry, mechanism, and fracture behavior

Cited by 80 publications

References 64 publications

Synthesis, characterization, and high potential of 3D metal–organic framework (MOF) nanoparticles for curing with epoxy

Synthesis, characterization, and high potential of 3D metal–organic framework (MOF) nanoparticles for curing with epoxy

Triple‐faced polypropylene: Fire retardant, thermally stable, and antioxidative

Chelating Fabrics Prepared by an Organic Solvent-Free Process for Boron Removal from Water

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