Preparation of MWCNTs-Graphene-Cellulose Fiber with Ionic Liquids

Abstract

The conductive multiwalled carbon nanotubes (MWCNTs)-graphene sheets (rGOs)-cellulose fiber was prepared with an eco-friendly wet-spinning method in which ionic liquid (IL) was used as both green solvent and dispersant. It was found that the selected IL 1-ethyl-3methylimidazolium diethyl phosphate (EmimDep) shows remarkable capacities for dissolving cellulose and dispersing MWCNTs, and the synergistic effect of MWCNTs, rGOs, and cellulose results in a high electrical conductivity of 1195 S/m of MWCNTs-rGOs-cellulose fibers. Macropores and the double-layer structure of MWCNTs and rGOs can be observed by SEM in the studied fibers, and the number of macropores decreased with increasing rGOs amount, which is consistent with the result of the specific surface area. In addition, the prepared MWCNTs-rGOs-cellulose fibers present a nearly perfect electrical double-layer structure. The MWCNTs-rGOs-cellulose fiber with a mass ratio of 2:3:1 shows the best performance as the electrode candidate, with an electrical conductivity of 1195 S/m, specific capacitance of 597 mF/cm 2 , and specific surface area of 91 m 2 /g. Furthermore, the results from the molecular dynamics (MD) simulation evidenced that EmimDep can disperse CNTs effectively at 363.15 K, 1 atm compared to rGOs; the synergy effect of CNT and rGO exhibit great potential to enhance the dispersion than each individual component.

Preparation of Printable and Biodegradable Cellulose-Laponite Composite for Electronic Device Application

“…Thus, there is a need for new solvents capable to dissolve cellulose for its further processing, flame retardant fillers are required to increase the flame retardancy properties and surface functionalization is required to convert the cellulose surface from hydrophilic to hydrophobic which will be more suitable for printing conductive circuits on the surface of the substrate. Recently, several researchers utilized ionic liquids (ILs) as the environmental friendly solvent to dissolve the cellulose and they found that ILs is the best dissolution medium [13][14][15][16][17][18][19][20][21]. In this work, cellulose-laponite composite materials were prepared by using 1-ethyl-3-methylimidazolium acetate ([emim][OAc]) as the recoverable dissolution medium, laponite clay as the inorganic fillers to improve the thermal stability and the flame retardancy and ethyl 2-cyanoacrylate (E2CA) as the hydrophobic agent.…”

A Nanofibrillated Cellulose-Based Electrothermal Aerogel Constructed with Carbon Nanotubes and Graphene

“…The network structure also formed many tiny pores on the pore wall. What’s more, NFC and GP can synergistically improve the dispersibility of MWCNTs in the suspension [ 47 ]. The dispersion is due to interfacial interactions among the oxygen-containing groups on the nano-carbon materials and cellulose material [ 48 ].…”

Fabrication of Regenerated Cellulose Fibers with Good Strength and Biocompatibility from Green Spinning Process of Ionic Liquid

“…[Emim]DEP was prepared by mixing N ‐methylimidazole and triethyl phosphate, which was described in detail in literature. [ 33,34 ] The wood pulp cellulose was oven‐dried at 105 °C to constant weight (0.24 kg) before use.…”