Synthesis and Surface Observation of Montmorillonite/Polyaniline Composites

Yamabe, Kohei; Goto, Hiromasa

doi:10.3390/jcs2010015

Cited by 11 publications

(4 citation statements)

References 22 publications

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“…In addition, the authors believe that it would be of interest to develop analytical models based on the same approach shown here not only for the fiber-reinforced composites, but also for other novel material systems such as polymer/clay composites [38] and multilayer nanocomposites of halloysite and biopolymers [39], that also possess a high mismatch in elastic properties of constituent materials.…”

Section: Discussionmentioning

confidence: 98%

Prediction of Orthotropic Hygroscopic Swelling of Fiber-Reinforced Composites from Isotropic Swelling of Matrix Polymer

2019

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Swelling in fiber-reinforced composites is anisotropic. In this work, dealing with glass fiber epoxy composite immersed in distilled water, swelling coefficients are obtained in each direction experimentally. Swelling behaviour in the fiber direction was constrained by the non-swelling fibers and was close to null, while swelling in the transverse directions was found to occur freely—similar to the unconstrained polymer. An analytical method for predicting anisotropic swelling in composites from the swelling of the matrix polymer is reported in this work. The method has an advantage that it is simple to use in practice and requires only a swelling coefficient of the matrix polymer, elastic constants of the matrix and fibers, and a known fiber volume fraction of the composite. The method was validated using finite element analysis. Good agreement was obtained and is reported between experimental hygroscopic swelling data, analytical and numerical results for composite laminates, indicating the validity of this predictive approach.

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Section: Discussionmentioning

confidence: 98%

Prediction of Orthotropic Hygroscopic Swelling of Fiber-Reinforced Composites from Isotropic Swelling of Matrix Polymer

2019

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“…The XRD patterns of pure PANI show semicrystalline nature, with a maximum broadened peak in 20°–30° of 2θ regions; the characteristic peaks are exhibited at 2θ = 14.50 ο , 20.49 ο , 25.32°, respectively. 25,43 PANI–10% NZF nanocomposites show the characteristic broad peaks of PANI and sharp peaks due to the presence of NZF nanoparticles. In PANI–20% NZF, the broad intensity peaks of PANI are slightly suppressed because, in addition to NZF, PANI is changing its structure from semicrystalline to amorphous phase.…”

Section: Resultsmentioning

confidence: 99%

Enhanced gas-sensing performance at room temperature and electrical properties of polyaniline–Ni_0.6Zn_0.4Fe₂O₄ nanocomposites

Prasanna

Nagaraju³

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part E:

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In this work, polyaniline–nickel–zinc–ferrite nanocomposites were synthesized by the in situ polymerization method by varying the concentrations of Ni0.6Z0.4Fe2O4 nanoparticles in the polyaniline matrix (10, 20, 30, 40, and 50 wt%). The synthesized nanocomposites were subjected to structural characterizations viz., X-ray diffraction, Fourier-transform infrared spectroscopy, and field-emission scanning electron microscopy techniques. Fourier-transform infrared spectroscopy and X-ray diffraction spectral studies reveal the presence of characteristic bands of both polyaniline and Ni0.6Z0.4Fe2O4 nanoparticles and the formation of their composites is confirmed with the interfacial interaction of Ni0.6Z0.4Fe2O4 nanoparticles in the polyaniline systems. The field-emission scanning electron microscopy images of polyaniline–Ni0.6Z0.4Fe2O4 nanocomposites show a symmetric morphological variation of Ni0.6Z0.4Fe2O4 nanoparticles compared to polyaniline. The electrical properties of the prepared samples were studied in the frequency range of 100 Hz–5 MHz at room temperature. The gas-sensing performance of the nanocomposites was studied at room temperature for butane gas. The polyaniline–10 wt% Ni0.6Z0.4Fe2O4 nanocomposite shows maximum sensing response (109%) at room temperature for 5000 ppm of butane gas with a good response of 28 s and recovery time of 31 s. The stability of the prepared sample was tested for 60 days.

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“…Kim and colleagues [24] also reported emulsionintercalated polyaniline-clay nanocomposites, and they reported that incorporation of clay interrupted the doping process and, thus, resulted in lower conductivity. Several other groups have synthesized PANi-clay nanocomposites [25][26][27][28][29][30]. Among these groups, Yeh and colleagues used PANi-MMT nanocomposites for corrosion protection for cold rolled steel [26].…”

Section: Introductionmentioning

confidence: 99%

Optimizing the Synthesis and Thermal Properties of Conducting Polymer–Montmorillonite Clay Nanocomposites

et al. 2022

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Given the availability of a wide range of properties not possessed by individual materials, nanocomposites based on conducting polymers and inorganic materials have attracted much deserved attention. However, there has been little attempt to optimize the synthesis and thermal properties of polyaniline–clay nanocomposites. In this study, the synthesis and thermal properties of polyaniline (PANi) and polyaniline–clay nanocomposites (PACN) were performed by systematically varying the feed composition. Both PANi and polyaniline–montmorillonite (MMT) nanocomposites were prepared by using ammonium persulfate (APS) as the oxidant. The chemical structure of the nanocomposites was studied by Fourier transform infrared spectroscopy (FTIR). FTIR spectra confirmed the presence of clay in the nanocomposites and the existence of mainly the emiraldine form of PANi. Thermal analysis was performed by using thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). The morphology and structure of PANi and PACN were studied by scanning electron microscopy (SEM), wide-angle X-ray diffraction (WAXD), and transmission electron microscopy (TEM). Our results confirm the intercalation and partial exfoliation of clay. This study also showed that increasing the oxidant concentration resulted in decreasing thermal stability and melting temperature of PANi. The reinforcement of PANi with MMT resulted in increased thermal stability and increased melting point of PANi. It was also shown that the addition of only about 0.1 wt% of APS resulted in an optimal thermal stability and melting point for PANi.

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Synthesis and Surface Observation of Montmorillonite/Polyaniline Composites

Cited by 11 publications

References 22 publications

Prediction of Orthotropic Hygroscopic Swelling of Fiber-Reinforced Composites from Isotropic Swelling of Matrix Polymer

Prediction of Orthotropic Hygroscopic Swelling of Fiber-Reinforced Composites from Isotropic Swelling of Matrix Polymer

Enhanced gas-sensing performance at room temperature and electrical properties of polyaniline–Ni_0.6Zn_0.4Fe₂O₄ nanocomposites

Optimizing the Synthesis and Thermal Properties of Conducting Polymer–Montmorillonite Clay Nanocomposites

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Synthesis and Surface Observation of Montmorillonite/Polyaniline Composites

Cited by 11 publications

References 22 publications

Prediction of Orthotropic Hygroscopic Swelling of Fiber-Reinforced Composites from Isotropic Swelling of Matrix Polymer

Prediction of Orthotropic Hygroscopic Swelling of Fiber-Reinforced Composites from Isotropic Swelling of Matrix Polymer

Enhanced gas-sensing performance at room temperature and electrical properties of polyaniline–Ni0.6Zn0.4Fe2O4 nanocomposites

Optimizing the Synthesis and Thermal Properties of Conducting Polymer–Montmorillonite Clay Nanocomposites

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Enhanced gas-sensing performance at room temperature and electrical properties of polyaniline–Ni_0.6Zn_0.4Fe₂O₄ nanocomposites