Scaling analysis on the linear viscoelasticity of cellulose 1-ethyl-3-methyl imidazolium acetate solutions

• Published in: Korea-Australia rheology journal Vol. 31; no. 3; pp. 123 - 139
• Main Authors: Kwon, Mi Kyung, Lee, Junghaeng, Cho, Kwang Soo, Lee, Sung Jun, Kim, Hyun Chul, Jeong, Sang Won, Lee, Se Geun
• Format: Journal Article
• Language: English
• Published: Seoul / Melbourne Korean Society of Rheology, Australian Society of Rheology 01.08.2019; Springer Nature B.V; 한국유변학회
• Subjects: Cellulose; Cellulose acetate; Characterization and Evaluation of Materials; Chemistry and Materials Science; Complex Fluids and Microfluidics; Dependence; Food Science; Ion migration; Ionic liquids; Ions; Materials Science; Mechanical Engineering; Molecular weight; Molecular weight distribution; Natural polymers; Polymer Sciences; Rheological properties; Scaling factors; Soft and Granular Matter; Superposition (mathematics); Viscoelasticity; 공학일반; molecular weight distribution (MWD); scaling analysis; cellulose/ionic liquid solution; linear viscoelasticity
• ISSN: 1226-119X; 2093-7660
• DOI: 10.1007/s13367-019-0014-5

Many researches have studied the viscoelasticity of cellulose/ionic liquid solutions through the conventional scaling rules which assume the monodisperse polymer. However, they are not suitable for cellulose since natural polymers such as cellulose have molecular weight distribution. In this paper, dynamic rheological behaviors of 1-ethyl-3-methyl imidazolium acetate solutions dissolving three kinds of celluloses were measured in a large range of concentrations from the dilute regime to the entangled semidilute regime at 25°C. We compared the viscosity-fitting scaling (Chen et al. , 2011) and the phenomenological scaling to replace the conventional scaling. Two scaling methods were applied to the linear viscoelasticity of the cellulose solutions with different molecular weights and molecular weight distributions. The results of each scaling were compared by the superposition of master curves obtained from each scaling. The effects of molecular weight distribution were observed by the dependence of the scaling factors on concentration and molecular weight of cellulose.