Publications by authors named "Unbong Baek"
Article Synopsis
- - The study examines how carbon black and multi-wall carbon nanotube (CB/MWCNT) hybrid fillers affect the properties of Ethylene propylene diene rubber (EPDM) composites when exposed to high-pressure hydrogen gas.
- - Researchers prepared EPDM composites using a master batch to improve the dispersion of CNTs, analyzing cure characteristics, mechanical properties, and hydrogen permeability.
- - Results indicated that higher amounts of MWCNTs lead to increased crosslink density and mechanical strength, while reducing hydrogen uptake and improving the composites' barrier properties against hydrogen gas.
We developed a method for characterizing permeation parameters in hydrogen sorption and desorption processes in polymers using the volumetric measurement technique. The technique was utilized for three polymers: nitrile butadiene rubber (NBR), ethylene propylene diene monomer (EPDM), and fluoroelastomer (FKM). The total uptake (C∞), total desorbed content (C0), diffusivity in sorption (D), and diffusivity in desorption (D) of hydrogen in the polymers were determined versus the sample diameter used in both processes.
View Article and Find Full Text PDFPaper-based sensors fabricated using the pencil-on-paper method are expected to find wide usage in many fields owing to their low cost and high reproducibility. Here, hydrogen (H) detection was realized by applying palladium (Pd) nanoparticles (NPs) to electronic circuits printed on paper using a metal mask and a pencil. We confirmed that multilayered graphene was produced by the pencil, and then characterized Pd NPs were added to the pencil marks.
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