Strong reinforcement effects in 2D cellulose nanofibril–graphene oxide (CNF–GO) nanocomposites due to GO-induced CNF ordering

Abstract

Nanocomposites from native cellulose with low 2D nanoplatelet content are of interest as sustainable materials combining functional and structural performance. Cellulose nanofibril-graphene oxide (CNF-GO) nanocomposite films are prepared by a...

Ultrathin Reduced Graphene Oxide/Organosilica Hybrid Membrane for Gas Separation

“…When q was greater than 0.15 nm –1 , the r-GO/organosilica hybrids showed higher intensity than the pristine organosilica, owing to the higher electron density accumulated in the r-GO/organosilica. 41 The broad shoulder around q = 0.1 nm –1 in the SAXS of the r-GO/organosilica could be attributed to the correlated r-GO sheets in the lamellar phase, with a corresponding spacing ( d = 2π/ q ) of 63 nm. 42 The information of the aggeregation state of the r-GO layers could be obtained from the fractal dimension ( d m ), which is related to the slope of the SAXS curves in the log–log scale at low q .…”

Interface effects from moisture in nanocomposites of 2D graphene oxide in cellulose nanofiber (CNF) matrix – A molecular dynamics study

“…In real nanocomposites, one would expect moisture to be trapped at the CNF-GO interface aer drying. For instance, vacuum-assisted ltration, which is widely used for making CNF-GO nanopaper, 29,34,36,42,89 is a relatively fast production method with insufficient time for complete drying. If real material interfaces showed as high microscale interfacial strength properties as we observed for molecular adhesion in the present study, stress-strain curves and fracture surfaces would possibly show more brittle behaviour than observed in experiments.…”

“…27 3D printing of CNF inks is a real possibility, 28 where it should be possible to include 2D nanosheets. For CNF-GO nanocomposites, there are not so many previous studies, [29][30][31][32] whereas graphene or reduced GO have been used more frequently 30,[33][34][35][36] when high electrical conductivity is desirable. (A table comparing mechanical properties reported in the literature is presented in ref.…”

“…(A table comparing mechanical properties reported in the literature is presented in ref. 29). We have recently investigated the mechanical behaviour of CNF-GO nanocomposites, 29 and carefully characterized the nanostructure using wide angle Xray scattering (WAXS) and small angle X-ray scattering (SAXS) techniques.…”

“…29). We have recently investigated the mechanical behaviour of CNF-GO nanocomposites, 29 and carefully characterized the nanostructure using wide angle Xray scattering (WAXS) and small angle X-ray scattering (SAXS) techniques. The gas barrier properties were inuenced by moisturizing-drying cycles, where interfacial interactions seemed to improve by moisture cycling, although in general, aspects of molecular adhesion effects are poorly understood.…”