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  1. AU="Ali Muhsan"
  2. AU="Barragán-Acea, Antonio"
  3. AU="Weber, Marc"
  4. AU="Ruth R. Montgomery"
  5. AU=Jurkovic D
  6. AU="Bernhardi, Rommy von"
  7. AU="Senthi, Bibi"
  8. AU="Sipe, Brian W"
  9. AU="Ajose, Azeezat O"
  10. AU="Samira Mellah"
  11. AU="Al-Embideen S." AU="Al-Embideen S."
  12. AU="Kushiro, Tetsuo"
  13. AU="Spec, Andrej"
  14. AU="Salaniwal, Arul"
  15. AU="Epps, Chad A."
  16. AU=Brandt Ulrich
  17. AU="Kim, Hoyong"
  18. AU="Klas Bratteby"
  19. AU="Kim, Sae-Hoon"
  20. AU=Spivak Jerry L
  21. AU="Joel, Anjana"
  22. AU="Hill, William"
  23. AU="Ken M. Cadigan"
  24. AU="Lee, Hyun-Shik"
  25. AU="Martini, Denise"
  26. AU=Aziz Noreen M
  27. AU="Ho, Tony"
  28. AU=Barzilay Joshua I.
  29. AU="Ishizaka, Alessio"
  30. AU="Chao, Pei-Dawn Lee"
  31. AU="Rosa Gouveia"

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  1. Artikel ; Online: The Effect of Agglomeration on the Electrical and Mechanical Properties of Polymer Matrix Nanocomposites Reinforced with Carbon Nanotubes

    Sebastian Tamayo-Vegas / Ali Muhsan / Chang Liu / Mostapha Tarfaoui / Khalid Lafdi

    Polymers, Vol 14, Iss 1842, p

    2022  Band 1842

    Abstract: In this work, we investigated the effect of carbon nanotubes addition and agglomeration formation on the mechanical and electrical properties of CNT–polymer-based nanocomposites. Six specimens with carbon nanotubes (CNTs) fractions of 0%, 0.5%, 1%, 2%, 4% ...

    Abstract In this work, we investigated the effect of carbon nanotubes addition and agglomeration formation on the mechanical and electrical properties of CNT–polymer-based nanocomposites. Six specimens with carbon nanotubes (CNTs) fractions of 0%, 0.5%, 1%, 2%, 4% and 5% were manufactured and characterized by dynamic mechanical analysis (DMA) and four-probe method. The stress–strain curves and electrical conductivity properties were obtained. Scanning electron microscopy (SEM) was used to characterize both agglomeration and porosity formation. By employing micromechanics, through representative volume element (RVE), finite element analysis (FEA) and resistor network model (RNM), the Young’s modulus and electrical conductivity values were calculated. The samples’ elastic moduli showed an increment, reaching the maximum value at a CNTs fraction of 2%, thereafter an adverse effect was caused in the high CNT percentage samples. The final electrical conductivity seemed greatly altered with the addition of CNTs, reaching the percolation threshold at 2%. The unavoidable formation of CNT agglomerates appeared to influence the final physical properties. The CNT agglomerates adversely affect the mechanical performance of high-CNT-percentage samples. Conversely, an exponential increment in the electrical conductivity was presented as the agglomerates formed networks allowing the transport of electrons through the tunnelling effect. These phenomena were experimentally and numerically confirmed, showing a good correlation.
    Schlagwörter nanocomposites ; agglomeration ; electrical properties ; mechanical properties ; computational modelling ; multi-scale modelling ; Organic chemistry ; QD241-441
    Sprache Englisch
    Erscheinungsdatum 2022-04-01T00:00:00Z
    Verlag MDPI AG
    Dokumenttyp Artikel ; Online
    Datenquelle BASE - Bielefeld Academic Search Engine (Lebenswissenschaftliche Auswahl)

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  2. Artikel ; Online: Effect of Graphene Nano-Additives on the Local Mechanical Behavior of Derived Polymer Nanocomposites

    Mostapha Tarfaoui / Khalid Lafdi / Imane Beloufa / Debora Daloia / Ali Muhsan

    Polymers, Vol 10, Iss 6, p

    2018  Band 667

    Abstract: In this study, indentation tests of graphene-based polymer nanocomposites were carried out to determine the local elastic mechanical properties. The samples consist of epoxy matrix with graphene additives. Additives were added at levels of 0% as a ... ...

    Abstract In this study, indentation tests of graphene-based polymer nanocomposites were carried out to determine the local elastic mechanical properties. The samples consist of epoxy matrix with graphene additives. Additives were added at levels of 0% as a control, 0.5%, 1%, 2.5%, 5% and 10% by weight. The local elastic properties such as moduli and hardness were calculated. After each indentation, the prints were characterized using scanning electron microscopy (SEM). It seems that the local mechanical properties of nanocomposite samples were improved as the amount of nano-additives increased. Based on the curve displacement and surface imaging, we can conclude that the nano-additives influenced the overall plastic mechanical behavior of the samples. For simulating micro-indentation test, a finite element analysis model was developed using ABAQUS software and compared to experimental tests. Good correlation was observed.
    Schlagwörter epoxy matrix ; graphene nano-additives ; micro-indentation test ; local properties ; effect of graphene ; Organic chemistry ; QD241-441
    Thema/Rubrik (Code) 621
    Sprache Englisch
    Erscheinungsdatum 2018-06-01T00:00:00Z
    Verlag MDPI AG
    Dokumenttyp Artikel ; Online
    Datenquelle BASE - Bielefeld Academic Search Engine (Lebenswissenschaftliche Auswahl)

    Volltext online

    Zusatzmaterialien

    Kategorien

    Fernleihe an ZB MED

    Sie können sich den gewünschten Titel als lokale Nutzerin oder lokaler Nutzer von ZB MED direkt an den Standort Köln schicken lassen.

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