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Network structure and mechanical properties of polydimethylsiloxane filled with nanodiamond – Effect of degree of silanization of nanodiamond

Hajiali, F ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1016/j.compscitech.2017.02.005
  3. Abstract:
  4. Reinforcement of polydimethylsiloxane (PDMS) was investigated using untreated nanodiamond (uND) and silane functionalized ND (sND) at various degrees of silanization. Scanning electron microscopy revealed an improved dispersion of ND in PDMS by silanization. The incorporation of uND and sNDs enhanced tensile strength up to 45% and 70%, respectively; however, greater improvement was observed for sNDs at very low concentrations, e.g. 0.2 wt%. The much improvement in crosslinking density, analyzed by Flory-Rehner model and Mooney-Rivlin plot, and interfacial interaction, characterized by Kraus and Cunneen-Russell plots, was also observed for sNDs. Interestingly, it was found that the extent of improvement in all the properties was closely related to the degree of silanization of sND. Dynamic mechanical properties of PDMS/ND composites were also investigated and discussed accordingly. © 2017 Elsevier Ltd
  5. Keywords:
  6. Nano particles ; Mechanical properties ; Microchannels ; Nanoparticles ; Particle reinforced composites ; Polydimethylsiloxane ; Reinforcement ; Scanning electron microscopy ; Silicones ; Tensile strength ; Cross-linking density ; Degree of silanization ; Dynamic mechanical property ; Functionalized ; Interfacial interaction ; Low concentrations ; Network structures ; Polydimethylsiloxane PDMS ; Nanodiamonds
  7. Source: Composites Science and Technology ; Volume 142 , 2017 , Pages 227-234 ; 02663538 (ISSN)
  8. URL: https://www.sciencedirect.com/science/article/pii/S0266353816310351