Optimum degree of functionalization for carbon nanotubes

Observations of a novel strengthening mechanism in HDPE nanocomposites

“…Thus, overcoming these Van der Waals forces to achieve affinity and thus good interface between the matrix and the nanoparticle is crucial to obtaining improved mechanical properties. A large number of research studies have focused on various functionalization techniques to enhance the dispersion and improve affinity between the polymer matrix and the nanofiller [7][8][9]. Non-functionalized nanofillers have some drawbacks in that they may encourage the formation stable agglomerates or bundles in the polymer matrix.…”

Analysis of photocurrent and capacitance of TiO2 nanotube–polyaniline hybrid composites synthesized through electroreduction of an aryldiazonium salt

“…21 However, when electropolymerization is used for coating of surfaces, weak adhesion between the organic layer and a substrate of different nature can occur: as was reported in the literature, the lack of strong interfacial bonding may result in the collapse of the hybrid nanostructures. 22 Other authors reported that, despite the very high capacitance (3407 F g À1 ) measured at ordered PANI nanorods on an ITO substrate, low stability was obtained during repeated cycles, due to poor electrical connectivity between the nanorods and the smooth surface of the ITO substrate. 23 This poor cyclability has become a major obstacle for PANI to be used in supercapacitors.…”

Mechanical Properties of Carbon Nanotubes Reinforced Composites: Experiment and Analytical Modeling

“…From these spectra, it seems that the as-received materials is mainly represented by a graphite structure (C-C and C=C groups), whereas the wrapped nanotubes shown the presence of COOH groups which agrees with the acrylic-wrapping process here performed. Indeed, the introduction of chemical groups into carbon nanotubes appears to yield strong bonding within the polymer, enhancing consequently the reinforcement-matrix stress transfer (Wang, 2009).…”