Interfacial Properties of Methylcelluloses: The Influence of Molar Mass
AbstractThe interfacial interactions of four methylcelluloses having the same average degree of substitution and distribution of methyl groups, but different molar masses, are studied at ambient temperature and at very low polymer concentrations. Firstly, the surface tension σ at the water/air interface is determined for the progressive addition of methylcellulose up to 100 mg/L; σ starts to decrease over 1 mg/L up to the critical aggregation concentration (CAC) at 10 mg/L. The curves describing the influence of polymer concentration on σ are independent of the molar mass at equilibrium. Secondly, the adsorption of methylcellulose on silica particles is estimated from ζ-potential measurements. The data are interpreted in terms of an increase of the adsorbed layer thickness at the interface when the molar mass of methylcellulose increases. It is concluded that methylcellulose is adsorbed, forming trains and loops at the interface based on the equilibrium between surface free energy and solvent quality. View Full-Text
Scifeed alert for new publicationsNever miss any articles matching your research from any publisher
- Get alerts for new papers matching your research
- Find out the new papers from selected authors
- Updated daily for 49'000+ journals and 6000+ publishers
- Define your Scifeed now
Nasatto, P.L.; Pignon, F.; Silveira, J.L.M.; Duarte, M.E.R.; Noseda, M.D.; Rinaudo, M. Interfacial Properties of Methylcelluloses: The Influence of Molar Mass. Polymers 2014, 6, 2961-2973.
Nasatto PL, Pignon F, Silveira JLM, Duarte MER, Noseda MD, Rinaudo M. Interfacial Properties of Methylcelluloses: The Influence of Molar Mass. Polymers. 2014; 6(12):2961-2973.Chicago/Turabian Style
Nasatto, Pauline L.; Pignon, Frédéric; Silveira, Joana L.M.; Duarte, Maria E.R.; Noseda, Miguel D.; Rinaudo, Marguerite. 2014. "Interfacial Properties of Methylcelluloses: The Influence of Molar Mass." Polymers 6, no. 12: 2961-2973.