Influence of dispersing additives on the conductivity of carbon black pigment dispersion

Abstract

The influence of dispersing additives on the electrical conductivity of carbon black pigments dispersed in an organic medium was studied. Two dispersing additives were examined in combination with two different carbon blacks, a conductive carbon black and a nonconductive one. These carbon blacks differ in the size of their aggregates and in the amounts of surface oxygen groups. Both of the additives form a monolayer when adsorbed on either of the pigment surfaces. FTIR studies showed that chemical bonding of one of the additives on the surfaces of both pigments had occurred. Conductivity decreases with increasing additive concentration, but in the case of the chemically bonded additive, the conductivity of the dispersion remained high even at higher additive loadings. This study helps in understanding the effects such additives have on the specific conductivity of composite materials that contain dispersed carbon black pigment particles.

Cementitious composites incorporating Multi-Walled Carbon Nanotubes (MWCNTs): effects of annealing and other dispersion methods on the electrical and mechanical properties

“…However, with increasing concentrations of dispersive agent, the conductivity of both solutions increases. The increase in conductivity is greater in a solution containing CNT and this variation in conductivity could be due to the formation of weak chemical bonds between the dispersive agent and the CNT as observed by Hauptman et al [42]. The conductivity of the solutions containing pristine CNT (1627 mS/cm) is very high compared to that of the solution containing dispersive agent, regardless of the addition of CNTs.…”

Highly conductive colloidal carbon based suspension for flow-assisted electrochemical systems

“…( Parant et al., 2017 ) reported a viscosity above 30 Pa.s at a shear rate of 5 s −1 for optimal acetylene black materials. These results show that achieving a compromise of high conduction and flowability remains challenging ( Madec et al., 2015 ; Akuzum et al., 2017 , 2020 ; Boota et al., 2014 ; Hauptman et al., 2011 ; Helal et al., 2016 ).…”

Highly Conductive Colloidal Carbon Based Suspension for Flow-Assisted Electrochemical Systems

“…Parant et al (Parant et al, 2017) reported a viscosity above 30 Pa.s at a shear rate of 5 s -1 for optimal acetylene black materials. These results show that achieving a compromise of high conduction and flowability remains challenging (Madec et al, 2015;Akuzum et al, 2017;Boota et al, 2014;Hauptman et al, 2011;Helal et al, 2016;Akuzum et al, 2020).…”