Zobrazeno 1 - 10
of 135
pro vyhledávání: '"Un Bong Baek"'
Publikováno v:
Materials & Design, Vol 235, Iss , Pp 112470- (2023)
The increasing use of high-pressure hydrogen gas has heightened the need to understand material behavior in hydrogen-rich environments. Recent studies have shown that examining the pore-shaped damage in the cross-section of rubber materials exposed t
Externí odkaz:
https://doaj.org/article/c2497faa97eb472b9033087430ea95ca
Autor:
Jae Kap Jung, Ji Hun Lee, Jin Sub Jang, Nak Kwan Chung, Chang Young Park, Un Bong Baek, Seung Hoon Nahm
Publikováno v:
Scientific Reports, Vol 12, Iss 1, Pp 1-13 (2022)
Abstract We demonstrate a simple experimental technology for characterizing the gas permeation properties of H2, He, N2 and Ar absorbed in polymers. This is based on the volumetric measurement of released gas and an upgraded diffusion analysis progra
Externí odkaz:
https://doaj.org/article/7ab9508569384957aa88ee842be44406
Publikováno v:
Scientific Reports, Vol 11, Iss 1, Pp 1-12 (2021)
Abstract We established an ex-situ technique for evaluating hydrogen gas permeability by thermal desorption analysis (TDA) gas chromatography (GC) and by self-developed diffusion analysis software. Absorbed hydrogen mass in rubber, related to the GC-
Externí odkaz:
https://doaj.org/article/63a40b61a4c342bd9ca6619db30359f1
Autor:
Jae Kap Jung, Ji Hun Lee, Sang Koo Jeon, Un Bong Baek, Si Hyeon Lee, Chang Hoon Lee, Won Jin Moon
Publikováno v:
Polymers, Vol 15, Iss 1, p 162 (2022)
We investigated the influence of two fillers—CB (carbon black) and silica—on the H2 permeation of EPDM polymers crosslinked with sulfur in the pressure ranges 1.2–90 MPa. H2 uptake in the CB-blended EPDM revealed dual sorption (Henry’s law an
Externí odkaz:
https://doaj.org/article/57b41ea2fc49437babeb868b6632e55c
Publikováno v:
Metals, Vol 12, Iss 11, p 1813 (2022)
Interest in hydrogen energy is increasing due to its eco-friendliness and ease of use. Research is being conducted to produce and use hydrogen in various fields such as hydrogen vehicles and nuclear power plants. However, considering the purity requi
Externí odkaz:
https://doaj.org/article/6ba799de95f0410c9810d6b050ff45d5
Publikováno v:
Polymer Testing, Vol 99, Iss , Pp 107147- (2021)
We report volumetric analysis techniques to analyze the transport properties of hydrogen dissolved in cylindrical-shaped polymers. The techniques utilize the volume measurement of the released hydrogen from rubber by gas collection in a graduated cyl
Externí odkaz:
https://doaj.org/article/73483b4b691846498b4c94188ec6be8d
Publikováno v:
Polymers, Vol 14, Iss 11, p 2233 (2022)
Rubber materials play a key role in preventing hydrogen gas leakage in high-pressure hydrogen facilities. Therefore, it is necessary to investigate rubber materials exposed to high-pressure hydrogen to ensure operational safety. In this study, permea
Externí odkaz:
https://doaj.org/article/4a5dd6fa059e4c6f94f31b9523d9f5de
Publikováno v:
Polymers, Vol 14, Iss 3, p 592 (2022)
Filler effects on H2 permeation properties in sulfur-crosslinked ethylene propylene diene monomer (EPDM) polymers blended with two kinds of carbon black (CB) and silica fillers at different contents of 20 phr–60 phr are investigated by employing vo
Externí odkaz:
https://doaj.org/article/badd629497ad4bb6b6d785cb9427fce3
Autor:
Jae Kap Jung, Chang Hoon Lee, Min Seok Son, Ji Hun Lee, Un Bong Baek, Ki Soo Chung, Myung Chan Choi, Jong Woo Bae
Publikováno v:
Polymers, Vol 14, Iss 4, p 700 (2022)
Filler effects on H2 diffusion in nitrile butadiene rubbers (NBRs) blended with carbon black and silica fillers of different concentrations are first investigated by employing a volumetric analysis. Total uptake, solubility, and diffusivity of hydrog
Externí odkaz:
https://doaj.org/article/7c7e9c450f034d6999a717eeb421e156
Publikováno v:
Polymers, Vol 14, Iss 4, p 756 (2022)
In the actual application of gas transport properties under high pressure, the important factors are sample size dependence and permeation efficiency, related to gas sorption. With a modified volumetric analysis technique, we firstly measured the ove
Externí odkaz:
https://doaj.org/article/b5320fc0ebae476db8ae83341fc322e7