The rheological properties of bamboo cellulose pulp/ionic liquid system

2016 Global Conference on Polymer and Composite Materials

材料科学;化学

Zhang, Y.F.^1 ; Zhang, P.R.^1 ; Wu, J.^1 ; Jia, Q.X.^1 ; Liu, X.Y.^1

School of Material Science and Engineering, Beijing Institute of Fashion Technology, Beijing

100029, China^1

关键词: Apparent viscosity;    Increased temperature;    Non-newtonian index;    Rheological property;    Rotational rheometer;    Spinning solution;    Structural viscosities;    Viscous flow activation energy;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/137/1/012071/pdf
DOI  :  10.1088/1757-899X/137/1/012071

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

In this study, two kinds of spinning solutions were prepared by dissolving bamboo cellulose pulp into 1-ethyl-3-methyl imidazole chloride salt ([EMIM] Cl) and 1-butyl-3-methyl imidazole diethyl phosphate salt ([BMIM]DEP) ionic liquids, respectively. Furthermore, the rotational rheometer was used to test the steady-state rheological properties of above as-prepared spinning solutions. The research results show that both of these two ionic liquids exhibit better solubility to the bamboo cellulose pulp. The apparent viscosities(ηa) decrease with the increased temperature(T) and shear rate(γ) and increase with the increased concentration. The non-Newtonian index(n) declined with the increase of both shear rate and concentration, as well as increased with the build-up temperature. The structural viscosity index(Δη) increased with the increased concentration and tended to decrease with temperature rise. Meanwhile, viscous flow activation energy(Eη) decreases with the increased share rate as well as the concentration. According to the results, it can be seen that the bamboo cellulose pulp/[EMIM]Cl with the concentration of 6% at 70°C exhibits better spinnability.