Characterization of non-covalently, non-specifically functionalized multi-wall carbon nanotubes and their melt compounded composites with an ethylene–octene copolymer

Hybrid modification of high‐density polyethylene with hyperbranched polyethylene‐functionalized multiwalled carbon nanotubes and few‐layered graphene

“…However, it is also found from Table that the elongation at break of HDPE dramatically drops upon introducing the single or hybrid filler at 1.1 and 3.3 vol %. The significant loss of ductility of polymer matrix caused by the addition of carbon nanomaterials have also been reported in the literature . In addition, by comparing the mechanical properties of these two sets of composites obtained with the single and hybrid filler, respectively, we can find that the hybrid filler does not show better modification effect than the single filler.…”

“…It has been well confirmed that the above effects of HBPE originate from its unique hyperbranched structure and high branching density (85–90 branches per 1000 carbons), which make it easier to be irreversibly adsorbed on the surface of CNT or graphene by means of noncovalent nonspecific CH‐π interactions, i.e., a weak hydrogen bonding interaction occurring between CH groups of the HBPE and π systems of CNT or graphene, thus rendering an effective barrier against their reaggregation . On the basis of above researches, modification effects of the resulting debundled MWCNT or graphene on various polymer matrix also have been investigated in our and other works.…”

Influence of the hydrocarbon chain length of imidazolium-based ionic liquid on the dispersion and stabilization of double-walled carbon nanotubes in water

“…9. We have observed a low viscosity of the DWCNT suspensions with the three ionic liquids; this low viscosity can be explained by better charge repulsion between hydrophobic groups (the hydrocarbon chains) oriented along CNTs, when the hydrophilic heads are directed towards the aqueous phase, which prevents the agglomeration of the CNT [17,56,57].…”

Noncovalent compatibilization of polypropylene/MWCNT composites using an amino-pyridine grafted polypropylene matrix

“…The specific surface area of the MWCNTs was 300 m 2 /g based on Brunauer-Emmett-Teller characterization. The average pore size of the MWCNTs as determined by N 2 sorption experiments was approximately 2.3 nm [10].…”

“…Various compatibilization approaches, including covalent and noncovalent functionalization of the matrix and/or filler, have been proposed to counteract this problem. Out of these, noncovalent functionalization approaches are preferred over covalent methods because of the preservation of desired electrical properties of the nanotubes .…”