Authors Le, H. H. ; Hoang, T. X. ; Schöne, E. ; Reuter, U. ; Stöckelhuber, K.W. ; Mandal, S. ; Dhakal, K. N. ; Adhikari, R. ; Wießner, S.
Title Effect of phase selective wetting of hybrid filler on the self-healing properties of rubber blends
Date 03.11.2021
Number 59652
Abstract In the present work, self-healable rubber blends consisting of modified bromobutyl rubber (BIIR)/natural rubber (NR) blends filled with silica (Si)/carbon nanotube (CNT) hybrid filler were prepared as model system. It was found that an addition of a low loading of silica as secondary filler for CNTs significantly enhances the tensile strength of the BIIR/NR blends while maintaining the self-healing properties. The synergistic effect of the hybrid filler on the mechanical properties of BIIR/NR blends can be explained by taking into account the selective wetting of the hybrid filler. Thus, a new method based on the wetting concept has been further developed for quantification of the selective wetting of hybrid filler in the BIIR/NR blends. The migration of silica to the BIIR/NR interfacial region and preferential location of the CNTs in NR phase may impart the BIIR/NR blends better mechanical performance and high electrical conductivity. The BIIR/NR blends filled with hybrid filler Si/carbon black (CB) were prepared as reference system. Its similarities and differences with the model system were discussed regarding the selective filler wetting and localization.
Journal Polymer
Citation Polymer 231 (2021) 124146

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