Effect of phase selective wetting of hybrid filler on the self-healing properties of rubber blends. (28th September 2021)

• Record Type: Journal Article
• Authors: Le, Hai H.; Hoang, Tung X.; Schoene, Erik; Reuter, Uta; Stöckelhuber, Klaus Werner; Mandal, Subhradeep; Dhakal, Kedar N.; Adhikari, Rameshwar; Wiessner, Sven
• Is Part Of: Polymer. Volume 231(2021)
• Publication Date: 2021-09-28
• Subjects: Self-healing -- Hybrid filler -- Rubber blends -- Selective filler wetting; Polymers -- Periodicals; Polymerization -- Periodicals; Polymères -- Périodiques; Polymérisation -- Périodiques; 547.7
• DOI: 10.1016/j.polymer.2021.124146
• Languages: English
• ISSNs: 0032-3861

Abstract

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. Graphical abstract: Image 1 Highlights: A new concept for quantification of the selective wetting of hybrid filler in rubber blend. Prediction of the selective wetting of hybrid filler in rubber blends. Correlation between filler wetting, electrical conductivity and self-healing properties. Joule heating triggered self-healing experiments.