Study on the effect of nanosilica particles on morphology, thermo-mechanical and electrical properties of liquid polysulfide modified epoxy hybrid nanocomposites

Guchhait, Prasanta K.; Bhandari, Subhendu; Singh, Surya Pratap; Rahaman, Mostafizur

doi:10.1007/s12588-011-9017-x

Cited by 14 publications

(9 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…There is a sharp decrease in dielectric constant in the low frequency region. This decrement can be attributed to the fact that as the frequency is increased the dipoles have insufficient time to orient themselves in the direction of applied electrical field, causing a decrease in dielectric constant with the increase in frequency [10, 36, 37]. Higher value of dielectric constant at lower frequencies may also be due to the effect of electrode polarization or Maxwell Wagner (MW) interface polarization between the interface of LDPE and nanotubes [38, 39].…”

Section: Resultsmentioning

confidence: 99%

Dependence of electrical properties of polyethylene nanocomposites on aspect ratio of carbon nanotubes

et al. 2013

View full text Add to dashboard Cite

Low density polyethylene nanocomposites filled with carbon nanotubes (CNT) having three different aspect ratios have been prepared by melt mixing technique. The effects of CNT loading, its aspect ratio, and frequency of electric field on electrical and dielectric properties of the nanocomposites have been investigated. DC and AC electrical resistivity are found to decrease with the increase in CNT loading in the composites, while the dielectric constant and loss increase with the increase in CNT loading in the composites. AC electrical resistivity, dielectric constant, and dielectric loss decrease with the increase in frequency. Furthermore, the electrical resistivity decreases with the increase in aspect ratio of CNT, whereas the dielectric constant and loss increase with the increase in aspect ratio of CNT. While probable mechanisms for electrical conduction have been proposed, dielectric results have been explained by considering CNT as nanocapacitors.

show abstract

Section: Resultsmentioning

confidence: 99%

Dependence of electrical properties of polyethylene nanocomposites on aspect ratio of carbon nanotubes

et al. 2013

View full text Add to dashboard Cite

show abstract

“…Comparing the MW0-W and MW0.24-W samples, the latter had a higher storage modulus, especially at low frequencies. This could mean that a relatively strong internal force was formed in MW0.24-W, which was due to be the interactive friction between MWCNTs and hydration products [ 32 ]. Meanwhile, it was found that MW0.24-NG presented a marginal higher value than MW0.24-W, indicating that incorporation of NS may increase the friction strength between MWCNTs and hydration products.…”

Section: Resultsmentioning

confidence: 99%

Nano-Silica Sol-Gel and Carbon Nanotube Coupling Effect on the Performance of Cement-Based Materials

Isfahani

et al. 2017

Nanomaterials

View full text Add to dashboard Cite

Carbon nanotubes (CNTs) have shown promise for improving the mechanical performance of cement composites through crack-bridging and frictional pull-out. The interactive behaviors between CNTs and cement matrix act are crucial in optimizing the reinforcement of CNTs in cement composites. This study investigates the effects of nano-silica (NS) sol-gel on the interactive behaviors of CNTs and the cement matrix through a series of experiments and analyses. UV-visible spectrometer results show that CNTs are well-dispersed in suspension and the addition of NS has a negligible effect on the stability of CNT dispersion. Calorimetry tests and dynamic mechanical analysis demonstrate the nucleation and frictional performance of CNTs in cement matrix, respectively. The paper shows that the physical adsorption of NS on the CNT surface could result in the acceleration of cement hydration. Morphology observation confirms that a denser interface between CNTs and cement hydrates is formed. Finally, the improved interaction between CNTs and cement hydrates leads to a substantial increase in friction between CNTs and the cement matrix under periodic loading. NS may act as an ideal admixture for improving both the interactive behaviors between CNTs and cement matrix and the damping properties of cement composite.

show abstract

“…Polysulfide polymers are available as crude rubber, suspended material, and liquid [ 8 , 9 ]. In the manufacturing of polysulfide resins, high-weight elastomeric polysulfides are first synthesized and then depolymerized to become liquid resins with a proportional molecular weight [ 8 , 10 , 11 ]. Unlike natural rubber, polysulfide polymers are not processable in rubber mills.…”

Section: Introductionmentioning

confidence: 99%

Kinetic Modeling and Degradation Study of Liquid Polysulfide Resin-Clay Nanocomposite

et al. 2021

View full text Add to dashboard Cite

Kinetic modeling and degradation study of liquid polysulfide (LPS)/clay nanocomposite is possible through Ozawa–Flynn–Wall (OFW) and Kissinger methods. Comparing the results of these models with experimental data leads to provide an accurate degradation kinetic evaluation of these materials. To this aim, the morphology and distribution of clay nanoparticles (CNPs) within the LPS matrix were investigated using Field Emission Scanning Electron Microscopy (FESEM) and X-ray diffraction (XRD). To evaluate the interaction between the LPS and the CNPs, the Fourier transform infrared (FTIR) identification was utilized. Furthermore, to investigate the kinetics of degradation, the thermal gravimetric analysis (TGA) and derivative thermogravimetry (DTG) of the samples were used in the nitrogen atmosphere with the help of Kissinger and Ozawa–Flynn–Wall (OFW) models. The characterization results confirmed the homogenous dispersion of the CNPs into the LPS matrix. In addition, the presence of CNPs increased the thermal stability and activation energy (Ea) of the samples at different conversion rates. Moreover, the OFW method was highly consistent with the experimental data and provided an appropriate fit for the degradation kinetics.

show abstract

Study on the effect of nanosilica particles on morphology, thermo-mechanical and electrical properties of liquid polysulfide modified epoxy hybrid nanocomposites

Cited by 14 publications

References 16 publications

Dependence of electrical properties of polyethylene nanocomposites on aspect ratio of carbon nanotubes

Dependence of electrical properties of polyethylene nanocomposites on aspect ratio of carbon nanotubes

Nano-Silica Sol-Gel and Carbon Nanotube Coupling Effect on the Performance of Cement-Based Materials

Kinetic Modeling and Degradation Study of Liquid Polysulfide Resin-Clay Nanocomposite

Contact Info

Product

Resources

About