A5015308860- Polymer Nanocomposites and Properties
- Polymer crystallization and properties
- Advanced Sensor and Energy Harvesting Materials
- Tribology and Wear Analysis
- Conducting polymers and applications
- Polymer composites and self-healing
- Synthesis and properties of polymers
- Fiber-reinforced polymer composites
- Silicone and Siloxane Chemistry
- Dielectric materials and actuators
- Supercapacitor Materials and Fabrication
- Natural Fiber Reinforced Composites
- Polymer Nanocomposite Synthesis and Irradiation
- Carbon Nanotubes in Composites
- Electrospun Nanofibers in Biomedical Applications
- Advanced Materials and Mechanics
- Epoxy Resin Curing Processes
- Liquid Crystal Research Advancements
- Advanced Battery Materials and Technologies
- Advancements in Battery Materials
- Mechanical Behavior of Composites
- biodegradable polymer synthesis and properties
- Engineering Applied Research
- Electromagnetic wave absorption materials
- Photonic Crystals and Applications
Jeonbuk National University
2015-2024
Cochin University of Science and Technology
2017
Chonbuk National University Hospital
2007-2014
Inha University
2013
Dankook University
2009
University of Akron
1994-2009
Virginia Tech
2006
Kumho Petrochemical (South Korea)
1997-1998
Chonnam National University
1998
Combining the physical principle of actuators with basic concept photonic crystals, colour-tunable three-dimensional (3D) were successfully fabricated. By controlling d-spacings and refractive index contrasts self-assembled 3D colloidal colours tuned. Various shapes these actuating objects constructed by transforming programmed 2D structures via bending, twisting folding mechanisms. These first breaking symmetry. The selective swellings then applied as driving forces to control actuators....
Shape memory composites are fascinating materials with the ability to preserve deformed shapes that recover when triggered by certain external stimuli. Although elastomers not inherently shape materials, inclusion of phase-change within elastomer can impart properties. When this filler changes phase from liquid solid, effective modulus polymer increases significantly, enabling stiffness tuning. Using gallium, a metal low melting point (29.8 °C), it is possible create elastomeric metallic...
Abstract Hybrid nanocomposites based on organophillic montmorillonite (MMT) and ethylene–propylene–diene rubber (EPDM) have been prepared by a melt compounding process. From analysis X‐ray diffraction transmission electron microscopy, the molecules were found to be intercalated into galleries of organoMMT silicate layers are uniformly dispersed as platelets 50–80 nm thickness in EPDM matrix. Dynamic mechanical studies reveal strong rubber–filler interaction hybrid nanocomposite which is...
Abstract Electrical and electromagnetic interference shielding effectiveness (EMI SE) properties of the ethylene methyl acrylate (EMA)/multiwalled carbon nanotube (MWNT) nanocomposites have been studied. High resolution transmission electron microscope (HRTEM) was used to validate MWNTs dispersion state network connections its microstructure. The electrical resistance decreases significantly with content. DC resistivity AC conductivity measurement on nanocomposite samples showed that...
Abstract Rubber compounds are reinforced with fillers such as carbon black and silica. In general, filled rubber show smooth rheological behaviour in measurement of Mooney viscosity or scorch time. Variation was studied terms the filler composition using natural both silica (carbon black/silica = 60/20,40/40, 20/60 phr). The compound 60/20 phr showed normal behaviour. However, 40/40 abnormal behaviour, which increased suddenly then decreased at a certain point during measurement. explained...
Abstract The performance of plasma surface modified silica filler in styrene‐butadiene rubber (SBR) matrix has been analyzed. conditions modification have optimized by taking secant modulus as a standard parameter and the occurrence confirmed area determination Fourier transform infrared spectroscopy. plasma‐modified found to be composed carbon–carbon double bonds carbon–hydrogen bonds. Silane treatment also carried out on for comparative assessment its influence curing behavior...
Abstract Filler dispersion is a critical factor in determining the properties of filled rubber composites. Silica has high density silanol groups on surface, which lead to strong filler–filler interactions and poor filler dispersions. A cure accelerator, N‐tert ‐butyl‐2‐benzothiazole sulfenamide (TBBS), was found improve silica‐filled natural (NR) compounds. For NR compounds without silane coupling agent, reversion ratio generally increased with increase TBBS content, whereas those...
Abstract This work describes the effect of speed drum‐type rotating collector in an electrospinning process on orientation electrospun poly(butylene terephthalate) fiber mats, and its tensile properties. The degree increased with increase drum (surface velocity) up to a critical level, thereafter, wavy fibers were observed. average diameter reduced distribution became narrower velocity. mechanical properties parallel direction improved about three times surface anisotropic behavior could be...
Abstract Cure kinetic studies on nitrile rubber(NBR)‐layered clay nanocomposites, prepared by a melt mixing process, was investigated using cure rheometer and differential scanning calorimeter (DSC). The characterization of the structure nanocomposites uncured cured samples performed X‐ray diffraction. results showed that interlayer spacing smaller than sample due to partial removal organoclay from spacing. marked decrease in scorch time NBR/organoclay system without affecting optimum torque...
AbstractAbstractThe effect of maleic anhydride (MA) modification jute fibre on the mechanical properties jute/polypropylene (PP) composites was studied. Jute fibre, an environmental friendly, low-density renewable material chemically modified with MA before incorporation PP to improve interfacial adhesion between them. Fourier transform infrared (FTIR) study showed that C=C groups attached cellulose reacted matrix. fibre/PP composite treated displayed higher Young's modulus and dynamic...