Characterization of hybrid fillers based on carbon black of different types obtained by impregnation

• Published in: Proceedings of the Institution of Mechanical Engineers. Part L, Journal of materials, design and applications Journal of materials, design and applications, 2017-10, Vol.231 (7), p.584-599
• Main Authors: Al-Ghamdi, Ahmed A, Al-Hartomy, Omar A, Al-Solamy, Falleh R, Dishovsky, Nikolay, Malinova, Petrunka, Lakov, Lako
• Format: Article
• Language: English
• Subjects: Absorption spectroscopy; Aging (artificial); Aging (natural); Atomic absorption analysis; Atomic beam spectroscopy; Carbon; Carbon black; Elastomers; Emission spectroscopy; Energy dispersive X ray spectroscopy; Fillers; Impregnation; Inductively coupled plasma; Investigations; Iodine; Mechanical properties; Natural rubber; Optical emission spectroscopy; Phases; Scanning transmission electron microscopy; Shielding; Silicon dioxide; Spectrum analysis; Thermal resistance; Transmission electron microscopy
• ISSN: 1464-4207; 2041-3076
• DOI: 10.1177/1464420715602141

The paper presents the investigations on obtaining dual phase fillers with preset silica content running a successful impregnation of two completely different types of conventional carbon black with silicasol. The hybrid fillers studied were characterized by atomic absorption spectroscopy and inductively coupled plasma–optical emission spectroscopy. The total pore volume, the average pore diameter, the specific surface area, the oil absorption number, and iodine adsorption of the fillers were also investigated. The distribution of both phases within the hybrid filler obtained and their interpenetration were investigated with scanning transmission electron microscopy-energy dispersive X-ray spectroscopy. The hybrid products obtained were investigated as reinforcing fillers of natural rubber-based composites. The results obtained show that the suggested impregnation with silicasol of conventional carbon black is a perspective method for preparation of carbon-silica dual phase fillers. The method provides an easy control over the quantitative ratio between the two phases. The fillers thus prepared do not change significantly the curing and mechanical characteristics of the vulcanizates, but improve their thermal aging resistance. The isolation of the carbon black aggregates by the silica phase, and the interpenetration of the two phases is a prerequisite to obtain elastomer composites of good mechanical and microwave properties suitable for producing of microwave shielding devices.