A5100720870- Fiber-reinforced polymer composites
- Carbon Nanotubes in Composites
- Graphene research and applications
- Polymer composites and self-healing
- Natural Fiber Reinforced Composites
- Photochromic and Fluorescence Chemistry
- Synthesis and properties of polymers
- Epoxy Resin Curing Processes
- Mechanical Behavior of Composites
- Polydiacetylene-based materials and applications
- Polymer crystallization and properties
- Thermal properties of materials
- Photopolymerization techniques and applications
- Force Microscopy Techniques and Applications
- Color Science and Applications
- Flame retardant materials and properties
- Image Enhancement Techniques
- Lignin and Wood Chemistry
- Electromagnetic wave absorption materials
- biodegradable polymer synthesis and properties
- Advanced Sensor and Energy Harvesting Materials
- Electrospun Nanofibers in Biomedical Applications
- Tribology and Wear Analysis
- Photoacoustic and Ultrasonic Imaging
- Silicone and Siloxane Chemistry
Konkuk University
2025
Korea Institute of Science and Technology
2018-2024
Korea University
2015-2023
Binghamton University
2023
Pohang University of Science and Technology
2017
Langley Research Center
2015
University of Tennessee at Knoxville
2014
National Institute of Aerospace
2014
Inha University
2011
Purpose There are three major processes in the surface mounting technology (SMT) manufacturing line, namely, printing, and reflowing. During reflow process, printed solder pastes melted into liquid cooled down solid again, forming joint. this because of combined force solder, components will move from placed location to final location. This is known as self-alignment performance process. From comparable studies, it that process with a longer time above liquidus (TAL) results better...
Numerous studies have been reported on thermal interface materials based synergistic hybrid effects, however, most of them contain only fragmentary experimental results and the related model has rarely proposed to explain effects exactly. Herein, conductivities composites were systematically evaluated according various filler contents ratios. It was found that fraction secondary inducing maximum effect decreased as total content increased. In addition, when higher than optimum fraction,...
Graphene nanoparticles coated with tannic acid were synthesized as non-halogen flame retardants; further, these electrospun polyurethane to produce multifunctional composite nanofibers. The nanofibers showed improved retardant, antimicrobial, and mechanical properties increasing amounts of bio-based, retardant. For instance, at 5 wt% the peak heat release rate was reduced from 340.75 235.23 W/g along 500% 135% improvement in antimicrobial activity Young's modulus, respectively, compared neat...
Photolithography is a well-established fabrication method for realizing multilayer electronic circuits. However, it challenging to adopt photolithography fabricate intrinsically stretchable circuits fully composed of an elastomeric matrix, due the opacity thick nanocomposite conductors. Here, we present photothermal lithography that can pattern conductors and via holes using pulsed lasers. The photothermal-patterned conductor exhibits 3 times higher conductivity (5940 S cm-1) 5 orders...
To evaluate the tensile strength and biomechanical properties of tension band wire technique using a ring pin in canine patellar transverse fracture model to compare it with conventional techniques. The patella adjacent structures were harvested from 11 adult cadavers osteotomized transversely. wiring single Kirschner metal was applied KM group (n = 7). KS 7) stabilized same as group, but nonabsorbable polyethylene orthopedic suture used instead wire. RS combination an suture. A axial force...
Polymer materials are extensively used because of their excellent performance; however, when for a long time, they break and eventually lose original properties. Thus, smart polymer that can repeatedly detect repair damage must be urgently developed to increase durability lifespan. In this study, material with dual functionality (damage-detection self-healing) is via facile method incorporating spiropyran (SP) beads, which exhibit changes in color fluorescence damaged, into Diels-Alder...
To facilitate the widespread use of carbon fiber reinforced thermoplastic polymer (CFRTP), enhancing its adhesion strength with other materials is crucial. In this study, we investigated synergic effect and underlying mechanism atmospheric pressure plasma silane coupling agent on improvement CFRTP. The plasma/mercapto-silane-treated CFRTP demonstrated a remarkable 282% increase in compared to untreated Our post-fracture analysis revealed that weakest CFRTP/adhesive interface was fortified,...
This paper presents an agent-based model of worker protest. Workers have varying degrees grievance depending on the difference between their wage and average neighbors. They protest with probabilities proportional to grievance, but are inhibited by risk being arrested—which is determined ratio coercive agents probable rebels in local area. We explore effect similarity perception dynamics collective behavior. If workers surrounded more in-group members, they risk-taking; if out-group...
Despite many studies of subsurface imaging carbon nanotube (CNT)-polymer composites via scanning electron microscopy (SEM), significant controversy exists concerning the depth and contrast mechanisms. We studied CNT-polyimide and, by three-dimensional reconstructions captured stereo-pair images, determined that maximum SEM was typically hundreds nanometers. The mechanisms were investigated over a broad range beam accelerating voltages from 0.3 to 30 kV, ascribed modulation embedded CNTs...
Self-assembled alkane layers are introduced between graphene to physically block nanometer size defects in and lateral gas pathways layers. A well-defined hexatriacontane (HTC) monolayer on could cover nanometer-size because of the flexible nature strong intermolecular van der Waals interactions alkane, despite roughness graphene. In addition, HTC multilayers greatly improve their adhesion. This indicates that can effectively pathway by filling open space with close-packed self-assembled...
Polyimide is actively applied in various industrial fields because of its strong mechanical properties, owing to the interactions between polymer chains. Fully aromatic imide structures exhibit high glass-transition temperatures due their chains, which hinder chain mobility. Therefore, preparing a material that exhibits self-healing at low temperature ≤100 °C and good properties challenging. Thus, we prepared imides with four-component semiaromatic by adjusting contents...