A5102838571- Dielectric materials and actuators
- Carbon Nanotubes in Composites
- Polymer Nanocomposites and Properties
- Composite Structure Analysis and Optimization
- Enhanced Oil Recovery Techniques
- Electromagnetic wave absorption materials
- Polymer crystallization and properties
- Rheology and Fluid Dynamics Studies
- Advanced Sensor and Energy Harvesting Materials
- Aeroelasticity and Vibration Control
- Hydraulic Fracturing and Reservoir Analysis
- Petroleum Processing and Analysis
- Polymer Foaming and Composites
- Polymer Nanocomposite Synthesis and Irradiation
- Plant Surface Properties and Treatments
- Injection Molding Process and Properties
- Thermal properties of materials
- Structural Load-Bearing Analysis
- Nanopore and Nanochannel Transport Studies
- Graphene research and applications
- Structural Analysis and Optimization
- Tribology and Wear Analysis
- Conducting polymers and applications
- Acoustic Wave Phenomena Research
- Vibration Control and Rheological Fluids
University of Calgary
2014-2022
Amirkabir University of Technology
2009-2012
The present work reveals results on the network formation of graphene nanoribbon (GNR) synthesized using a nonoxidative technique from multiwalled carbon nanotube (MWCNT). MWCNT and GNR presented comparable powder conductivity dispersion state in poly(vinylidene fluoride) (PVDF) matrix. This enabled us to purely discern effect geometrical features nanofillers by comparing rheological electrical percolation PVDF Unique response PVDF/GNR nanocomposites, such as abrupt transition solid state,...
Results of the present study demonstrate potential graphene nanoribbon to induce giant synergistic effects in broadband dielectric properties multiwalled carbon nanotube/graphene nanoribbon/polyvinylidene fluoride (MWCNT/GNR/PVDF) nanocomposites. The nanocomposites were prepared using a melt-mixing technique at various nanofiller total contents and MWCNT/GNR weight ratios. Rheology coupled with AC conductivity measurements unearthed highly superior capability MWCNT neighbor or interlace...
Poly(vinylidene fluoride) (PVDF) was melt-mixed with custom-synthesized multiwalled carbon nanotubes (CNTs) at various loadings to create polymer nanocomposites for electrical applications. The custom-made CNTs were fine-tuned using chemical vapor deposition technique over a broad range of temperatures, i.e., from 550 950°C 100°C intervals. Characterization revealed that synthesis temperature had huge impact on the structural features and, consequently, CNT network formation within polymeric...
Partially hydrolyzed polyacrylamide (HPAM) is one of the most widely used polymers for enhanced oil recovery operations. However, high temperature and salinity in reservoirs restrict its functionality performance. To alleviate this, incorporating fumed silica nanoparticles (NPs) HPAM solutions was found to be very effective harsh reservoir conditions improve efficiency polymer flooding. Studying flow behavior hybrid NP under real can challenging hard achieve due continuously converging...
The similar molecular structure but different geometries of the carbon nanotube (CNT) and graphene nanoribbon (GNR) create a genuine opportunity to assess impact nanofiller geometry (tube vs. ribbon) on electromagnetic interference (EMI) shielding polymer nanocomposites. In this regard, GNR its parent CNT were melt mixed with polyvinylidene fluoride (PVDF) matrix using miniature mixer at various loadings, i.e., 0.3, 0.5, 1.0 2.0 wt%, then compression molded. Molecular simulations showed that...
Unique dispersion states of nanoparticles in polymeric matrices have the potential to create composites with enhanced mechanical, thermal, and electrical properties. The present work aims determine state from melt-state rheological behavior nanocomposites based on carbon nanotube graphene nanoribbon (GNR) nanomaterials. GNRs were synthesized nitrogen-doped nanotubes via a chemical route using potassium permanganate some second acids. High-density polyethylene (HDPE)/GNR nanocomposite samples...
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The present study introduces a highly accurate numerical calculation of buckling loads for an elastic rectangular plate with variable thickness, elasticity modulus, and density in one direction. has two opposite edges ( x = 0 a) simply supported other y b) various boundary conditions including supported, clamped, free, beam (elastically supported). In-plane normal stresses on are not limited to any predefined mathematical equation. By assuming the transverse displacement vary as sin( mπ x/...
Abstract The main objective of the present work was study effect organoclay on planar shrinkage anisotropy polymeric injection‐molded products by means a rheological technique, in conjunction with birefringence measurements, performed polycarbonate/organoclay samples. Polarized optical microscopy at elevated temperatures revealed that due to ordered‐silicate layers had negative contribution overall maximum value calculated‐order parameter based these results found be near unity, indicating...
The present work reports the electrorheological (ER) response of high-density polyethylene (HDPE)/organically modified silicate layers nanocomposites based on four commercially available HDPE matrices. Two single-site catalyzed bimodal resins, one unimodal resin and Ziegler–Natta are studied. It is revealed that distinct separation two modes resins significantly enhances ER response. proposed slower structural relaxation introduced by higher molecular weight species in matrices enhance...
In this article, dynamic analysis of functionally graded (FG) plates integrated with two piezoelectric layers has been carried out. The rectangular plate is simply supported at four edges and exposed to excitation. Three-dimensional elasticity equations have considered. Using a series expansion mechanical electrical displacements, the partial differential reduced ordinary (ODEs) variable coefficients. solution resulting system ODEs out using Galerkin method. final result obtained by taking...
This study sheds light on the effect of nitrogen (N) doping carbon nanotubes (CNTs) medium-amplitude oscillatory shear (MAOS) response CNT/polyvinylidene fluoride (PVDF) nanocomposites within a rheologically percolated concentration regime. Custom-synthesized CNTs without and with heteroatom (at atomic percent 3.85 at. %) were incorporated into PVDF matrix using miniature melt-mixer at different concentrations. In both cases, as confirmed by TEM investigations, nanoscopic state dispersion in...