Large-Scale Spinning Assembly of Neat, Morphology-Defined, Graphene-Based Hollow Fibers

Abstract

Large-scale assembly of graphenes in a well-controlled macroscopic fashion is important for practical applications. We have developed a facile and straightforward approach for continuous fabrication of neat, morphology-defined, graphene-based hollow fibers (HFs) via a coaxial two-capillary spinning strategy. With a high throughput, HFs and necklace-like HFs of graphene oxide have been well-controlled produced with the ease of functionalization and conversion to graphene HFs via simply thermal or chemical reduction. This work paves the way toward the mass production of graphene-based HFs with desirable functionalities and morphologies for many of important applications in fluidics, catalysis, purification, separation, and sensing.

Three-dimensional graphene layers prepared by a gas-foaming method for supercapacitor applications

“…For charge transfer in the vertical direction, there will be less resistance in 3D graphene layers than in rGO, because it is easier for charges to access the inter-space in continuously cross-linked structures in 3D graphene layers. The electrical conductivity of 3D graphene layers is superior to the reported 3D-structured graphene, such as honeycomb-like 3D graphene produced by self-assembly (649 S m À1 ) [10], 3D foam-like graphene/poly (dimethyl siloxane) produced by CVD (1000 S m À1 ) [41], and 3D morphology-defined, graphene-based hollow fibers formed via a coaxial two-capillary spinning strategy (800-1000 S m À1 ) [42]. This electrical conductivity is also an attractive property for many practical applications.…”

Graphene fiber: a new trend in carbon fibers

“…Besides wet-spinning, there have emerged some alternative methods for the fabrication of GFs from GO dispersions [61][62][63][64][65][66][67][68][69][70][71][72][73][74]. For example, Dong et al proposed a dimensionally confined hydrothermal strategy for GFs [66].…”

Graphene fiber: a new material platform for unique applications

“…22 Figure 2a shows a schematic illustration of the setup for the direct spinning of hollow GO fibers in a coagulation bath of methanol solution (Figure 2b). The concentrated GO suspension has a high viscosity, allowing it to be directly bubbled, thus providing the chance to elaborately tune the morphologic character of the resultant GO fibers.…”