Thickening Properties of Carboxymethyl Cellulose in Aqueous Lubrication

Increasingly restricted availability and environmental impact of mineral oils have boosted the interest in sustainable lubrication. In this study, thickening properties sodium carboxymethyl celluloses (CMCs) were investigated order to assess their potential as viscosity modifiers aqueous gear bearing fluids. The pressure, temperature shear dependence was studied at different concentrations molecular weights MW. tribological grades both sliding rolling contact, compared rapeseed oil polyethylene glycol 400. CMC solutions adjustable all application-relevant grades. Viscosity indices similar or higher reference fluids oil. Temporary permanent losses increased with Permanent loss highest for high MW derivatives, up 70%. pressure-viscosity coefficients α low showed a dependency on concentration. 35% lower friction values MW, whereas no improvement lubricating observed contact. results suggest that has great bio-based thickener