School of Chemistry & Materials Science, Shaanxi Normal University, Xi'an 710062, PR China.
J Hazard Mater. 2010 May 15;177(1-3):452-7. doi: 10.1016/j.jhazmat.2009.12.054. Epub 2009 Dec 21.
Cellulose triacetate was prepared via reacting of a mixture of acetic anhydride and acetic acid containing sulfuric acid as catalyst with ramie fiber obtained from a biomass of ramie. The cellulose triacetate with a degree of substitution (DS) 2.93 of the ramie fiber was obtained. The honeycomb-like cellulose triacetate microspheres with an average diameter of 14 microm were made from the cellulose triacetate solution. The optimum conditions for preparing the microspheres were determined as cellulose triacetate/dichloromethane ratio 1:7 (w/w), and 0.75% sodium dodecylsulfonate. The cellulose triacetate microspheres were characterized using FT-IR, NMR, XRD, and SEM. Application of the microspheres as an adsorbent for removing disperse dyes in water was investigated under the temperatures from 15 to 50 degrees C, pHs from 4 to 9, and the weight of cellulose triacetate microspheres from 0.03 to 0.09 g. The cellulose triacetate microspheres exhibited a 16.5mg/g capability to remove DR dye from water at 50 degrees C and pH 7.
三醋酸纤维素是通过在含有硫酸的乙酸酐和乙酸的混合物与从苎麻生物质中获得的苎麻纤维反应制备的。获得了取代度（DS）为 2.93 的苎麻纤维三醋酸纤维素。从三醋酸纤维素溶液中制备出具有平均直径为 14 微米的蜂窝状三醋酸纤维素微球。确定了制备微球的最佳条件为三醋酸纤维素/二氯甲烷比为 1：7（w/w），以及 0.75％十二烷基磺酸钠。使用 FT-IR、NMR、XRD 和 SEM 对三醋酸纤维素微球进行了表征。在 15 至 50°C 的温度，4 至 9 的 pH 值和 0.03 至 0.09 g 的三醋酸纤维素微球的重量下，研究了微球作为吸附剂用于去除水中的分散染料的应用。三醋酸纤维素微球在 50°C 和 pH 7 时显示出从水中去除 DR 染料的 16.5mg/g 的能力。
