Highly aligned, ultralarge-size reduced graphene oxide/polyurethane nanocomposites: Mechanical properties and moisture permeability

A review of the water barrier properties of polymer/clay and polymer/graphene nanocomposites

“…Atomic force microscopy (AFM) has also been used and gave a value of 150 in one study [102] and was found to corroborate the TEM results of another [94]. An extremely high aspect ratio of 13,500 was reported to have been measured using SEM [104].…”

“…Transparency is another requirement for many of these applications. However, this can be a difficulty because some polymer/graphenebased films are opaque [72,74,94,95,104,118,119]. However, where there is very good dispersion of the graphene or graphene-oxide platelets, then highly transparent, high barrier films can be produced that have potential for use in electronic devices such as flexible electronic papers, OLEDs, flexible liquid crystal displays, organic solar cells and organic thin film transistors [97,99,100,102,122].…”

Oxygen Permeability Coefficient of High Density Polyethylene/Cu Nanofibers Nanocomposites below Percolation

“…It was also found that barrier to gas properties of the polymer composites can be enhanced (i.e. the values of the permeability to gas coefficient reduce as percentage of fiber contents increases) as documented in the literature [17][18][19][20][21][22][23][24][25][26][27] . One important key factor that enhances mechanical properties of the polymer is the aspect ratio of the fillers (i.e.…”

Effect of morphological state of graphene on mechanical properties of nanocomposites

“…Voigt and Reuss approximations of the RoM were used to provide upper and lower bounds for the Young's modulus of nanoparticle-reinforced nanocomposites. Many studies employed the HT micromechanical model that was originally formulated for nanocomposites both with unidirectional and randomly oriented particles [13] for prediction of the Young's modulus of graphene nanocomposites [12,[14][15][16]. In this study, only the version for unidirectional alignment is considered since the microstructural analysis demonstrated that reinforcements are preferentially aligned [6].…”

“…The RoM, which was originally developed for composites reinforced with continuous constituents, was modified by Padawer and Beecher [10] for discontinuous planar-particle composites. May et al [11] investigated reinforcement efficiency of pristine graphene flakes employing a modified RoM (MRoM), While Yousefi et al [12] used the RoM to compare the performance assessment of GO/polyurethane nanocomposites with those in literature. Voigt and Reuss approximations of the RoM were used to provide upper and lower bounds for the Young's modulus of nanoparticle-reinforced nanocomposites.…”