Morphological investigations on silica and carbon-black filled acrylonitrile butadiene rubber for sealings used in high-pressure H2 applications
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In: International Journal of Hydrogen Energy , Vol. 67.2024, No. 20 May, 23.04.2024, p. 540-552.
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TY - JOUR
T1 - Morphological investigations on silica and carbon-black filled acrylonitrile butadiene rubber for sealings used in high-pressure H2 applications
AU - Clute, Clara
AU - Balasooriya, Winoj
AU - Cano Murillo, Natalia
AU - Theiler, Géraldine
AU - Kaiser, Andreas
AU - Fasching, Michael
AU - Schwarz, Thomas
AU - Hausberger, Andreas
AU - Pinter, Gerald
AU - Schlögl, Sandra
N1 - Publisher Copyright: © 2024 Hydrogen Energy Publications LLC
PY - 2024/4/23
Y1 - 2024/4/23
N2 - To understand the effects of additives on the properties of rubber grades suitable for sealing applications in high-pressure H2 gas infrastructure, five acrylonitrile butadiene rubber (NBR) vulcanizates with different fillers and curing agents are investigated. Structure-property relationships of these grades are correlated with the additives and properties required for high-pressure gas atmospheres are evaluated. Further, the influence of the exposure to high-pressure hydrogen, i.e., hydrogen uptake and morphological changes after exposure, is evaluated. With the addition of a silica filler and a coupling agent for improved filler-matrix interfaces, similar overall properties, e.g. crosslink density, tensile strength, and storage modulus are obtained, compared to a carbon black (CB) filled grade. Density reduction after hydrogen exposure is significantly higher for CB-filled NBR, indicating higher hydrogen uptake in CB-filled rubber compared to silica filled NBR grades, or slower gas desorption. However, CB-filled specimens show to be less prone to filler migration than the silica-filled samples.
AB - To understand the effects of additives on the properties of rubber grades suitable for sealing applications in high-pressure H2 gas infrastructure, five acrylonitrile butadiene rubber (NBR) vulcanizates with different fillers and curing agents are investigated. Structure-property relationships of these grades are correlated with the additives and properties required for high-pressure gas atmospheres are evaluated. Further, the influence of the exposure to high-pressure hydrogen, i.e., hydrogen uptake and morphological changes after exposure, is evaluated. With the addition of a silica filler and a coupling agent for improved filler-matrix interfaces, similar overall properties, e.g. crosslink density, tensile strength, and storage modulus are obtained, compared to a carbon black (CB) filled grade. Density reduction after hydrogen exposure is significantly higher for CB-filled NBR, indicating higher hydrogen uptake in CB-filled rubber compared to silica filled NBR grades, or slower gas desorption. However, CB-filled specimens show to be less prone to filler migration than the silica-filled samples.
KW - Acrylonitrile butadiene rubber
KW - Filler-rubber-interaction
KW - High-pressure hydrogen gas
KW - Rapid gas decompression (RGD)
KW - Sealing
UR - http://www.scopus.com/inward/record.url?scp=85190887673&partnerID=8YFLogxK
U2 - 10.1016/j.ijhydene.2024.04.133
DO - 10.1016/j.ijhydene.2024.04.133
M3 - Article
AN - SCOPUS:85190887673
VL - 67.2024
SP - 540
EP - 552
JO - International Journal of Hydrogen Energy
JF - International Journal of Hydrogen Energy
SN - 0360-3199
IS - 20 May
ER -
