Influence of process parameters on the morphology, rheological and dielectric properties of three-roll-milled multiwalled carbon nanotube/epoxy suspensions

Olowojoba, Ganiu B.; Sathyanarayana, S.; Caglar, Burak; Kiss-Pataki, Bernadeth; Mikonsaari, Irma; Hübner, Christof; Elsner, Peter

doi:10.1016/j.polymer.2012.11.054

Cited by 30 publications

(23 citation statements)

References 42 publications

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“…The freeze-dried GO, having an average lateral size of 33 ± 17 lm, was dispersed in the DGEBA epoxy resin using a three-roll mill (80E; Exakt, Germany) as described elsewhere (Olowojoba et al 2013). A stoichiometric amount of the anhydride (Albidur HE600) was then added to the GO/DGEBA mixture (i.e.…”

Section: Composite Preparationmentioning

confidence: 99%

In situ thermally reduced graphene oxide/epoxy composites: thermal and mechanical properties

et al. 2016

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Graphene has excellent mechanical, thermal, optical and electrical properties and this has made it a prime target for use as a filler material in the development of multifunctional polymeric composites. However, several challenges need to be overcome to take full advantage of the aforementioned properties of graphene. These include achieving good dispersion and interfacial properties between the graphene filler and the polymeric matrix. In the present work, we report the thermal and mechanical properties of reduced graphene oxide/epoxy composites prepared via a facile, scalable and commercially viable method. Electron micrographs of the composites demonstrate that the reduced graphene oxide (rGO) is well dispersed throughout the composite. Although no improvements in glass transition temperature, tensile strength and thermal stability in air of the composites were observed, good improvements in thermal conductivity (about 36 %), tensile and storage moduli (more than 13 %) were recorded with the addition of 2 wt% of rGO.

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Section: Composite Preparationmentioning

confidence: 99%

In situ thermally reduced graphene oxide/epoxy composites: thermal and mechanical properties

et al. 2016

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“…Besides involving several chemical reaction steps, such procedures usually create some defects at the CNT surface, which can negatively affect the intrinsic properties of CNTs. Other approaches such as the use of volatile solvents, high shear mixing and ultrasonication, have been adopted for similar purpose …”

Section: Introductionmentioning

confidence: 99%

Conducting epoxy networks modified with non‐covalently functionalized multi‐walled carbon nanotube with imidazolium‐based ionic liquid

Pereira¹,

Soares

2016

J of Applied Polymer Sci

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Multi-walled carbon nanotube (MWCNT) was non-covalently functionalized with room-temperature ionic liquid (IL), 1butyl-3-methyl-imidazolium tetrafluoroborate and blended with epoxy pre-polymer (ER) with the assistance of ultrasonication in the presence of acetone as a diluting medium. The ability of IL in improving the dispersion of MWCNT in epoxy pre-polymer was evidenced by transmission optical microscopy. The corresponding epoxy/MWCNT networks cured with anhydride displayed an increase of the electrical conductivity of around three orders of magnitude with the addition of IL in a proportion of MWCNT/IL 5 1:5 mass ratio. The effect of IL on dynamic mechanical properties and thermal conductivity was also evaluated. The improved thermal and electrical properties was attributed to the better dispersion of MWCNT within the epoxy matrix by IL, evidenced by transmission electron microscopy of the ER/MWCNT networks cured with anhydride. Raman spectroscopy was also used to confirm the interaction between MWCNT and IL.

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“…A three roll milling approach has been used to disperse CNTs into the epoxy system since it guarantee a good dispersion of CNTs in viscous epoxy systems. An extensive study of the damage of CNTs during the dispersion process has been performed in order to analyze the final properties in relation to the real geometric parameters of the CNTs .…”

Section: Introductionmentioning

confidence: 99%

Analysis and simulation of the electrical properties of CNTs/epoxy nanocomposites for high performance composite matrices

et al. 2015

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Carbon fiber composite laminates have good electrical properties due to the performance of the fibers, but the composite anisotropy induces a quite lower conductivity through the thickness. In fact, in this direction the fiber bundles are separated by insulating epoxy matrix. In this work, CNTs (carbon nanotubes) with different geometries and functionalization have been added to an epoxy resin to improve the electrical performance. The nanofilled matrix has been used to produce carbon fiber (CF) composites for aerospace applications. Multiscale modeling was used to predict some important parameters such as percolation threshold and the model has been successfully verified with experimental results. The results reported show a good improvement of the electrical and mechanical properties both in the matrix and in the composites. In particular, in composites with the nanocomposite matrix, an improvement of one order of magnitude in the electrical conductivity through the laminate thickness has been achieved. POLYM. COMPOS., 38:105–115, 2017. © 2015 Society of Plastics Engineers

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Influence of process parameters on the morphology, rheological and dielectric properties of three-roll-milled multiwalled carbon nanotube/epoxy suspensions

Cited by 30 publications

References 42 publications

In situ thermally reduced graphene oxide/epoxy composites: thermal and mechanical properties

In situ thermally reduced graphene oxide/epoxy composites: thermal and mechanical properties

Conducting epoxy networks modified with non‐covalently functionalized multi‐walled carbon nanotube with imidazolium‐based ionic liquid

Analysis and simulation of the electrical properties of CNTs/epoxy nanocomposites for high performance composite matrices

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