GO/PEDOT:PSS nanocomposites: effect of different dispersing agents on rheological, thermal, wettability and electrochemical properties

Abstract

In this work glucose (G), α-cyclodextrin (α-CD) and sodium salt of carboxymethyl cellulose (CMCNa) are used as dispersing agents for graphene oxide (GO), exploring the influence of both saccharide units and geometric/steric hindrance on the rheological, thermal, wettability and electrochemical properties of a GO/poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) nanocomposite. By acting on the saccharide-based additives, we can modulate the rheological, thermal, and wettability properties of the GO/PEDOT:PSS nanocomposite. Firstly, the influence of all the additives on the rheological behaviour of GO and PEDOT:PSS was investigated separately in order to understand the effect of the dispersing agent on both the components of the ternary nanocomposite, individually. Subsequently, steady shear and dynamic frequency tests were conducted on all the nanocomposite solutions, characterized by thermal, wettability and morphological analysis. Finally, the electrochemical properties of the GO/PEDOT composites with different dispersing agents for supercapacitors were investigated using cyclic voltammetry (CV). The CV results revealed that GO/PEDOT with glucose exhibited the highest specific capacitance among the systems investigated.

Effect of Different Water-Soluble Graphene: (Polystyrene Sulfonate, Titanate Coupling Agent and Glucose)/Reduced Graphene Oxide on the Performance of Magnesium-Air Batteries

“…The hydrophilic group of PSS (-SO 3 Na) makes RGO soluble in aqueous solution. 34 This increases the ionic diffusion and transport with the highest conductivity of PSS/RGO + NaCl electrolyte, which gives AP65 anode a higher discharge activity than in the other electrolytes. In Table II, the anode utilization rates of AP65 anode in the three water-soluble graphene solutions are 54.8% (Gl/RGO + NaCl), 54.2% (PSS/RGO + NaCl) and 52.6% (TM-200S/RGO + NaCl) at 10 mA cm −2 , higher than that in NaCl solution (52.1%).…”

“…2). 33,34 The third way is by reducing GO with glucose (Gl: C 6 H 12 O 6 , molecular formula Fig. 1c).…”

Recent Applications of Biopolymers Derived from Fish Industry Waste in Food Packaging

“…However, its potential utilization could certainly be much larger, including for example tissue engineering, drug delivery, wound dressing, scaffolds, pharmaceutical contaminant removal, cancer diagnosis, composites and nanocomposites, high-tech materials, packaging, dye removal. In nanocomposite material preparation, chitosan has been demonstrated to be successful as a stabilizing agent, for example, for titania nanoparticle dispersion [ 115 ], expanded graphite [ 116 ], graphene oxide [ 117 , 118 ] and rare-earth elements [ 119 ]. In addition, both chitin and chitosan can be mixed with other biopolymers, such as poly (vinyl alcohol), alginate, collagen, cellulose acetate, by obtaining bio-polymer blends, characterized by improved mechanical properties [ 120 , 121 , 122 , 123 ].…”

A Study on Exfoliation of Expanded Graphite Stacks in Candelilla Wax

“…Polymer matrix nanocomposites attract a lot of attention since a small amount of filler can produce strong changes in the polymer with limited changes to their processability [32]. Many studies in the literature report the use of nanographite stacks to modify the functional and/or mechanical properties of polymers, often using dispersions in solvents [33,34,35,36]. The use of masterbatches has been an economic strategy to disperse nanographite stacks into polymers, since pre-exfoliation of graphite can be reached.…”