A5100621669- Polymer Foaming and Composites
- biodegradable polymer synthesis and properties
- Polymer crystallization and properties
- Polymer composites and self-healing
- Gas Dynamics and Kinetic Theory
- Advanced Sensor and Energy Harvesting Materials
- Carbon dioxide utilization in catalysis
- Electromagnetic wave absorption materials
- Phase Equilibria and Thermodynamics
- Natural Fiber Reinforced Composites
- Aerogels and thermal insulation
- Polymer Nanocomposites and Properties
- Rheology and Fluid Dynamics Studies
- Dielectric materials and actuators
- Cellular and Composite Structures
- Injection Molding Process and Properties
- Surface Modification and Superhydrophobicity
- Computational Fluid Dynamics and Aerodynamics
- Additive Manufacturing and 3D Printing Technologies
- Advanced Antenna and Metasurface Technologies
- Carbon Nanotubes in Composites
- Electrospun Nanofibers in Biomedical Applications
- Conducting polymers and applications
- Fluid Dynamics and Turbulent Flows
- Plasma and Flow Control in Aerodynamics
University of Toronto
2016-2025
Plastic Electronic (Austria)
2025
Sichuan University
2016-2024
University of New Brunswick
1999-2024
University of Waterloo
2010-2024
Wonkwang University
2023
Korea Air Force Academy
1961-2022
Toronto Public Health
2015-2020
Shandong University
2020
Sungkyunkwan University
2019-2020
A two-temperatur e chemical-kinet ic model for air is assessed by comparing theoretical results with existing experimental data obtained in shock tubes, ballistic ranges, and flight experiments. In the model, one temperature (T) assumed to characterize heavy-particle translational molecular rotational energies, another (Tv) vibrational, electron translational, electronic excitation energies. The nonequilibrium flow tubes are using computer code STRAP (shock-tube radiation program) along...
Chemical-kinetic parameters governing the e ow in shock layer over a heat shield of blunt body entering Earth’ s atmosphere from hyperbolic orbit are derived. By use assumption that is made carbon phenolic and by allowing for an arbitrary rateof pyrolysis-gasinjection, chemical reactions occurring postulated, collision integrals transport properties, rate coefe cients reactions, needed bifurcation model nite-rate kinetic wall boundary conditions determined using best available techniques....
The validity of the author's two-temperature, chemical/kinetic model which author has recently improved is assessed by comparing calculated results with existing experimental data for nitrogen in dissociating and weakly ionizing regime produced behind a normal shock wave. computer program Shock Tube Radiation Program (STRAP) based on two-temperature used calculating flow properties wave Nonequilibrium Air (NEQAIR) program, determining radiative characteristics flow. Both programs were...
Abstract Microllular plastics are cellular polymers characterized by cell densities greater than 10 9 cells/cm 3 and cells smaller μm. One of the critical steps in continuous production microcellular is promotion high nucleation rates a flowing polymer matrix. These can be achieved first forming polymer/gas solution followed rapidly decreasing solubility gas polymer. Since, processing range interest, decreases as pressure decreases, rapid drop element, consisting nozzle, has been employed...
Lightweight polypropylene/stainless-steel fiber (PP-SSF) composites with 15-35% density reduction were fabricated using foam injection molding. The electrical percolation threshold, through-plane conductivity, and electromagnetic interference (EMI) shielding effectiveness (SE) of the PP-SSF composite foams characterized compared against solid counterparts. With 3 wt % CO2 dissolved in PP as a temporary plasticizer lubricant, breakage was significantly decreased during molding, well-dispersed...
In this study, we fabricated conductive poly(vinylidene fluoride) (PVDF)/carbon composites simply by dispersing multiwalled carbon nanotubes (MWCNTs) and graphene nanoplatelets into a PVDF solution. The electrical conductivity the electromagnetic interference (EMI) shielding of PVDF/carbon were increased increasing filler amounts. Moreover, also found that EMI properties PVDF/CNT/graphene higher than those PVDF/CNT PVDF/graphene composites. mean values PVDF/5 wt %-CNT, PVDF/10 %-graphene,...
Lightweight, biodegradable, thermally insulating, and electrically conductive materials play a vital role in achieving the sustainable development of our society. The fabrication such multifunctional is currently very challenging. Here, we report general, facile, eco-friendly way for large-scale ultralow-threshold biodegradable porous polylactic acid (PLA)/multiwalled carbon nanotube (MWCNT) high-performance thermal insulation electromagnetic interference (EMI) shielding applications. Thanks...
In recent decades, problems with electromagnetic interference (EMI) radiation have arisen, that can seriously reduce the performance of precision devices nearby and threaten human health.
The electrical conductivity and the EMI shielding properties could be effectively tuned by foaming degree.
Bio- and CO<sub>2</sub>-sourced non-isocyanate polyurethane (NIPU) microcellular foams were prepared using supercritical carbon dioxide (scCO<sub>2</sub>) foaming technology.
Lightweight high-density polyethylene (HDPE)–graphene nanoplatelet (GnP) composite foams were fabricated via a supercritical-fluid (SCF) treatment and physical foaming in an injection-molding process. We demonstrated that the introduction of microcellular structure can substantially increase electrical conductivity decrease percolation threshold polymer–GnP composites. The nanocomposite had significantly higher conductivity, dielectric constant, electromagnetic interference (EMI) shielding...
Melt blending is one of the most promising techniques for eliminating poly(lactic acid)'s (PLA) numerous drawbacks. However, success in a typical melt process usually achieved through inclusion high concentrations second polymeric phase which can compromise PLA's green nature. In pioneering study, we introduce production situ microfibrillar PLA/polyamide-6 (PA6) blends as cost-effective and efficient technique improving properties while minimizing required PA6 content. Predominantly biobased...
It is well-known that attractive electromagnetic interference (EMI) shielding performance depends on functional (e.g., electrical and magnetic) fillers structural designs. This paper presents a novel three-layered sandwich structure of poly(vinylidene fluoride) (PVDF)-based nanocomposites, consisting graphene nanoplatelets (GNP), nickel (Ni), carbon nanotubes (CNT). The unique GNP-Ni-CNT exhibited excellent EMI ability due to the several interfaces multilayered with electric loss by...