A5040671340- Polymer Foaming and Composites
- Polymer composites and self-healing
- Botulinum Toxin and Related Neurological Disorders
- Marine and Coastal Research
- Nanotechnology research and applications
- Fiber-reinforced polymer composites
- Carbon Nanotubes in Composites
- Advanced Surface Polishing Techniques
- Advanced Sensor and Energy Harvesting Materials
- Electronic Packaging and Soldering Technologies
- Injection Molding Process and Properties
- Natural Fiber Reinforced Composites
- Phase Equilibria and Thermodynamics
- Metal and Thin Film Mechanics
- Cellular and Composite Structures
- Force Microscopy Techniques and Applications
- Diverse Approaches in Healthcare and Education Studies
- Advanced Materials and Mechanics
- 3D IC and TSV technologies
- Dielectric materials and actuators
Korea Institute of Science and Technology
2018-2024
Yonsei University
2022-2023
We propose the unique structure of highly dispersible single-walled carbon nanotubes (SWCNTs) in various solvents and polymers using ZnO nano particle template. Buckled nanospring-shaped (NS-CNTs) were synthesized by a chemical reaction nanoparticles with acid-treated SWCNTs then dissolving through etching. The distorted hexagonal NS-CNTs encircled around was formed bending caused agglomeration chemically adsorbed Zn(OH)2, which is further crystallized as polycrystalline inner core. could be...
Abstract Herein, a smart material with versatile bending capability is developed using microcellular foaming process (MCPs). In contrast to previous hydrogel-based approaches, the bi-layered fabricated typical thermoplastics, polyethylene terephthalate glycol (PETG) and polymethyl methacrylate (PMMA), achieve shape deformation in response thermal stimuli. Further, theoretical model for materials based on modified Timoshenko’s employed predict comprehend this phenomenon. Due distinct...
Several researchers have investigated the phenomenon of polymer-gas mixtures, and a few proposed diffusion coefficient values instead model. There is paucity studies focused on continuous change in corresponding to overall pressure temperature range mixture. In this study, gas sorption desorption experiments poly(methyl methacrylate) (PMMA) were conducted via solid-state batch foaming, weight was measured using gravimetric method with magnetic balance. The control parameters temperature,...
In this study, the vibration and sound response characteristics of composites produced via injection molding applied with a microcellular foaming process (MCPs) were improved. The study was conducted using PA6 glass fiber composites, which are representative thermoplastic engineering plastics. Two types specimens used: plate specimen to confirm basic characteristics, large roof-rack from an actual vehicle complex shape. frequency function curve calculated by conducting impact test, natural...
정신질환 치료명령 대상자의 재범을 예측 및 재범위험성 분류 등급의 근거로 활용 할 수 있는 도구인 RAMDO(Risk Assessment for Mentally Disordered Offenders)를 개발하였다. 구체적으로 전국 54개 지역의 보호관찰소에서 처분을 받은 치 료명령 대상자 207명의 개인적 특징과 위험요인을 수집하고 문항들을 추출했다. 척 도를 개발한 후, K-PRAI-R 다른 도구들과의 비교 분석을 통해 공존 구성 타당 도 그리고 효용성을 위한 절단점을 알아보았다. RAMDO는 14개 문항이며 정적 요 인, 동적 요인, 위험관리 요인 등 총 3개의 하위 요인으로 구성되었다. 추출된 문항 들의 보호관찰 기간 내 재범 적중률은 80.2%이었으며, ROC 알아본 결 과, AUC는 .80으로 재범/비재범 집단을 유의미하게 분류해 주는 것으로 나타났다. 척도의 절단점은 9점 이상일 때 민감도와 특이도의 합이 최대가 되었다. 상-중-하 삼 분위로 분류할 경우 6점과...
This study proposes a novel process that integrates the molding and patterning of solid-state polymers with force generated from volume expansion microcellular-foaming (MCP) softening due to gas adsorption. The batch-foaming process, which is one MCPs, useful can cause thermal, acoustic, electrical characteristic changes in polymer materials. However, its development limited low productivity. A pattern was imprinted on surface using mixture 3D-printed mold. controlled changing weight gain by...