Rheology of Lyocell Solutions from Different Cellulose Sources |
| |
Authors: | B J Collier M Dever S Petrovan J R Collier Z Li X Wei |
| |
Institution: | (1) Department of Consumer and Industry Services Management, University of Tennessee, Knoxville, TN;(2) Chemical Engineering Department, University of Tennessee, Knoxville, TN |
| |
Abstract: | Rheological measurements were used to characterize the behavior of lyocell solutions, i.e., cellulose dissolved in N-methymorpholine-N-oxide. Cellulose sources included dissolving pulp, kraft pulp, sugar cane fibers, and kenaf fibers. The dominance of viscous behavior, G values, over elastic behavior, G values, is affected by cellulose concentration and molecular weight. At lower concentrations and degrees of polymerization (DP), dissolving pulp solutions show viscous, inelastic behavior at low frequencies. At higher concentration and DP, dissolving pulp solutions are more elastic at higher frequencies. Solutions prepared with kenaf and sugar cane fibers show similar properties to those using pure dissolving pulp, and comparisons suggest the molecular weight and/or the presence of other substances such as lignin in the cellulose from these alternative sources affect the rheology. |
| |
Keywords: | Lyocell cellulose rheology viscosity |
本文献已被 SpringerLink 等数据库收录! |
|