Polyacrylonitrile Fibers Containing Graphene Oxide Nanoribbons

Abstract

Graphene oxide nanoribbon (GONR) made by the oxidative unzipping of multiwalled carbon nanotube was dispersed in dimethylformamide and mixed with polyacrylonitrile (PAN) to fabricate continuous PAN/GONR composite fibers by gel spinning. Subsequently, PAN/GONR composite fibers were stabilized and carbonized in a batch process to fabricate composite carbon fibers. Structure, processing, and properties of the composite precursor and carbon fibers have been studied. This study shows that GONR can be used to make porous precursor and carbon fibers. In addition, GONR also shows the potential to make higher mechanical property carbon fibers than that achieved from PAN precursor only.

Origin and Control of Polyacrylonitrile Alignments on Carbon Nanotubes and Graphene Nanoribbons

“…This feature further differentiates GNRs from CNTs, in which chemical modifications inevitably involve the destruction of the sp 2 carbon network . Overall, our simulation results provide justifications for recent experimental efforts to develop composite nanofibers containing CNTs with various diameters or GNRs …”

“…Finally, performing large‐scale FF MD simulations, we showed that the desirable linear PAN–CNT alignments arise even for large initial misorientation angles, and further demonstrated that graphene nanoribbons are a promising carbon nano‐reinforcement candidate due to its zero‐curvature nature and the possibility of edge functionalization. Given the enormous process parameters still need to be optimized, for example, electrospinning versus gel spinning in the preparation of PAN‐GNR composite fibers and subsequent annealing conditions, a set of atomistic pictures established in this study will be valuable guidelines toward the development of next‐generation carbon fibers.…”

Biofunctionalization of zirconia with cell-adhesion peptides via polydopamine crosslinking for soft tissue engineering: effects on the biological behaviors of human gingival fibroblasts and oral bacteria

“…Compared to traditional immobilization approaches, PDA-assisted surface modication exhibits several advantages as (1) it signicantly improves the anchoring of biomolecules; (2) it is a simple method that does not require time-consuming synthesis of complex linkers; (3) the process is non-toxic and uses water as a solvent, reducing the risk of damaging the biological activity of the adhesion molecules; and (4) it can be applied to complex geometries. 35 Chien et al 36,37 reported that implant surface functionalization with RGD-conjugated polymers via PDA-assisted immobilization promoted titanium biocompatibility and osteogenic response. However, to the best of our knowledge, the effect of PDA-assisted RGD peptide graing on so tissue healing around zirconia abutment surfaces has not yet been explored.…”

Hydrophilic PAN based carbon nanofibres with improved graphitic structure and enhanced mechanical performance using ethylenediamine functionalized graphene

“…9 Therefore, lowcost approaches for carbon bres with improved graphitic structures and enhanced mechanical performance at relatively low carbonization temperature are of much interest. Nanocarbons such as carbon nanotubes (CNTs), 10 graphene oxide (GO), 11 and graphene (Gr), 12 possess exceptional mechanical, electrical, thermal, and optical performances, making them appealing for the development of high performance composites and bres. 13,14 Taking the advantages of large surface area and long range graphitic structure, large interfacial area will be created between the carbon nanollers and surrounding polymeric matrix.…”