A5100723859- biodegradable polymer synthesis and properties
- Advanced Sensor and Energy Harvesting Materials
- Polymer crystallization and properties
- Polymer Nanocomposites and Properties
- Conducting polymers and applications
- Electrospun Nanofibers in Biomedical Applications
- Liquid Crystal Research Advancements
- Natural Fiber Reinforced Composites
- Textile materials and evaluations
- Carbon Nanotubes in Composites
- Polymer composites and self-healing
- Advanced Cellulose Research Studies
- Dyeing and Modifying Textile Fibers
- Microplastics and Plastic Pollution
- Additive Manufacturing and 3D Printing Technologies
- Organic Electronics and Photovoltaics
- Nanocomposite Films for Food Packaging
- Synthesis and properties of polymers
- Advanced Materials and Mechanics
- Dielectric materials and actuators
- Advanced Polymer Synthesis and Characterization
- Graphene research and applications
- Advanced Battery Materials and Technologies
- Polymer Nanocomposite Synthesis and Irradiation
- Thermal properties of materials
Hanyang University
2014-2023
Anyang University
2016-2023
Seoul Institute
2019
Government of the Republic of Korea
2019
Mehran University of Engineering and Technology
2014
Chung-Ang University
2006-2012
Samsung (South Korea)
2009
Abstract This study reviews the problems in use and disposal of poly (ethylene terephthalate) (PET) includes concise background virgin recycled PET as well their possible applications. The current state knowledge with respect to recycling method is presented. Recycling most desirable for waste management, providing an opportunity reductions oil usage, carbon dioxide emissions requiring because its non-degradability. Advanced technologies systems reducing contamination, mechanical chemical...
Fiber nanomaterials can become fundamental devices that be woven into smart textiles, for example, miniaturized fiber-based supercapacitors (FSCs). They utilized portable, wearable electronics and energy storage devices, which are highly prospective areas of research in the future. Herein, we developed porous carbon nanotube–graphene hybrid fibers (CNT–GFs) all-solid-state symmetric FSCs, were assembled through wet-spinning followed by a hydrothermal activation process using environmentally...
Currently, most commercial polyols used in the production of polyurethane (PU) foam are derived from petrochemicals. To address concerns relating to environmental pollution, a sustainable resource, namely, castor oil (CO), was this study. improve efficiency, sustainability, and compressive strength PU foam, which is widely as an impact-absorbing material for protective equipment, synthesized with CO-based multifunctional polyols. high functionalities were via facile thiol-ene click reaction...
Abstract Polypyrrole (PPy) was polymerized both chemically and electrochemically in sequence on nylon 6 woven fabrics, giving rise to polypyrrole–nylon composite fabrics (PPy–N) with a high electric conductivity. The stability of the prepared by electrochemical polymerization (ECP) chemical oxidative (COP) fabric better than that solely COP process, since AQSA dopant able strongly interact PPy main chain had large molecular structure. temperature dependence conductivity composites verified...
Abstract Changes in conductivity with repeated fabric extension were investigated to improve the properties of conductive electrode pad material used for electrotherapy when it is subjected various movement human body. Highly stretchable and fabrics prepared by situ chemical polymerization polypyrrole on nylon–spandex stretch aqueous solutions 0.5 M pyrrole, 1.165 FeCl 3 , 0.165 benzenesulfonic acid at 5°C 1 h. Performance was evaluated terms changes as a function tensile strain, extension,...
Abstract Poly(ethylene terephthalate) (PET) nanocomposites reinforced with multiwall carbon nanotubes (MWCNTs) were prepared through melt compounding in a twin‐screw extruder. The presence of MWCNTs, which acted as good nucleating agents, enhanced the crystallization PET heterogeneous nucleation. incorporation small quantity MWCNTs improved thermal stability PET/MWCNT nanocomposites. mechanical properties increased even MWCNTs. There was significant dependence rheological on MWCNT content....
Abstract Material from recycled poly(ethylene terephthalate) (PET) chips obtained used water bottles was extruded with virgin fiber‐grade PET in blends of 20, 40, and 70 wt %. Filament fibers the recycled/virgin were spun using a melt spinning process drawn by thermal drawing to improve their mechanical properties. As compounded chips, degradation temperature ( T d ) melting m increased, crystallization c rate decreased. This means that has better stability but lower than PET. The double...
Effective surface alkylation of cellulose nanocrystals (CNCs) was developed using a nucleophilic substitution reaction with an alkyl bromide to convert hydrophilic groups on the CNCs into and degree quantitatively determined. The resultant alkylated exhibited improved dispersion in nonpolar environment increased hydrophobicity, compared unmodified acetylated CNCs. Polylactide (PLA) nanocomposites reinforced modified were prepared by solution casting method effects reinforcement thermal...
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,...
Abstract Polymer nanocomposites consisting of multiwall carbon nanotube (MWCNT) and poly(ethylene 2,6‐naphthalate) (PEN) were prepared by a melt blending process in twin‐screw extruder. The storage modulus ( G′ ) loss G″ the PEN/MWCNT increased with increasing frequency, this increment being more significant at low frequency. terminal zone slope for decreased MWCNT content, nonterminal behavior those was related to dominant nanotube–nanotube interactions higher leading formation...
Abstract The effect of stearic acid modification on the dispersity silica nanoparticles and adhesion between filler polymer matrix with concentration were investigated. wettability was improved by addition acid. presence adsorbed surface reduced interaction nanoparticles, size agglomerates increasing concentration. Silica nanoparticle–reinforced poly(ethylene 2,6‐naphthalate) (PEN) composites melt‐blended to investigate their mechanical properties processability composites. torque total...
Abstract Incorporation of nanofillers into polyurethane (PU) is a promising technique for enhancing its thermal and mechanical properties. Silane grafting has been used as surface treatment the functionalization graphene oxide (GO) with numerous reactive sites dispersed on basal plane edge. In this study, amine-grafted GO was prepared using silanization (3-aminopropyl)triethoxysilane. The functionalized (fGO) characterized by Fourier transform infrared spectroscopy (FT-IR) X-ray...
: A highly porous nonwoven thermoplastic polyurethane (TPU)/Polypropylene (PP) triboelectric nanogenerator (N-TENG) was developed. To fabricate the layers, TPU nanofiber directly electrospun onto PP at different basis weights (15, 30, and 50 g/m2). The surface morphologies porosities of mats were characterized by field-emission scanning electron microscopy porosimetry. performance TPU/PP based TENG found to improve with an increase in weight PP. maximum output voltage current N-TENG 50%...