Loading...

Improvement of nanosilica effects on the performance of mechanically processed styrene-butadiene rubber by rational hybridization with nanodiamond

Mohammadi, A ; Sharif University of Technology | 2022

94 Viewed
  1. Type of Document: Article
  2. DOI: 10.1016/j.diamond.2022.109487
  3. Publisher: Elsevier Ltd , 2022
  4. Abstract:
  5. Hybrid nanoparticle comprising of nanosilica (NS) and nanodiamond (ND), denoted by ND@NS, was synthesized by a two-step chemistry route and then incorporated into styrene-butadiene rubber (SBR) at low concentrations up to 5 phr by a two-roll mill. Physical hybrids of NS and ND, i.e., ND&NS, with a weight ratio similar to chemical hybrid (80:20 for NS:ND), were also incorporated into SBR. Field emission scanning electron microscopy observations revealed very fine dispersion of nanoparticles in the case of physical hybrids (ND&NS). In contrast, agglomerations and aggregation of nanoparticles were evidenced for ND@NS. Tensile and dynamic mechanical analyses exhibited a higher reinforcing effect of hybrid nanoparticles with respect to single nanoparticles; however, ND&NS showed even better performance compared with ND@NS due to better filler-rubber interaction caused by improved filler dispersion. So, tensile strength, elastic modulus, and elongation at break of unfilled SBR increased about 23 %, 40 %, and 110 %, respectively, in the case of ND&NS. It was also realized that the incorporation of ND@NS and ND&NS, both at 5phr, enhanced the thermal conductivity of SBR by around 46 % and 31 %, respectively, with slightly better influence of ND@NS on thermal conductivity due to the improvement of the phonon energy transfer mechanism in this case. © 2022 Elsevier B.V
  6. Keywords:
  7. Nanodiamond ; Nanohybrids ; Nanosilica ; Rubber ; Thermal conductivity ; Butadiene ; Dispersions ; Energy transfer ; Field emission microscopes ; Fillers ; Nanoparticles ; Scanning electron microscopy ; Styrene ; Synthesis (chemical) ; Tensile strength ; Hybrid nanoparticle ; Hybridisation ; Low concentrations ; Nano Silica ; Performance ; Styrene/butadiene rubbers ; Synthesised ; Two-roll mill ; Weight ratios ; Nanodiamonds
  8. Source: Diamond and Related Materials ; Volume 130 , 2022 ; 09259635 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S0925963522006690