含NaCl_KCl葡萄糖水溶液的密度和粘度测定及分析.docxVIP

V o l. 29 N o. 2 2003204 华 东 理 工 大 学 学 报 Journal of East Ch ina U niversity of Science and T echno logy  129 文章编号: 100623080 (2003) 0220129205 含 NaC l、KC l 葡萄糖水溶液的密度和粘度测定及分析 赵长伟3 , 马沛生, 华 超 (天津大学化工学院, 天津 300072) 摘要: 在 w = 0. 05、0. 10、0. 15、0. 20、0. 25 的葡萄糖水溶液中加入N aC l、KC l, 在 293. 15K～ 323. 15K 下测定了该溶液的密度及粘度。 回归计算了N aC l、KC l 在该体系中的密度参数及粘度 B 系数。 结果表明, 在葡萄糖含量及N aC l、KC l 浓度一定的情况下, 体系的密度和粘度随温度升高而 减小; 在同一温度及N aC l、KC l 浓度下, 随葡萄糖含量的增加体系的密度和粘度随之增加; 两种电 解质的 B 系数随葡萄糖含量的增加及温度的升高也增大; 在此基础上进一步讨论了该体系内部溶 质2溶剂、溶质2溶质间的相互作用, 说明了N aC l、KC l 对葡萄糖水溶液的结构会有一定的促进和破 坏作用。 关键词: 葡萄糖; 密度; 粘度; 氯化钠; 氯化钾 中图分类号: TQ 013. 1 文献标识码: A M easurem en t and Analysis of D en sit ies and V iscosit ies of Aqueous Glucose Solut ion s with NaCl and KCl ZH A O Chang 2w ei3 , M A P ei2sh eng , H UA Chao (S chool of Chem ica l E ng ineering and T echnology , T ianj in U n iversity , T ianj in 300072, Ch ina ) Abstract: V isco sit ies and den sit ies of aqueou s gluco se so lu t io n w ith differen t concen t rat io n s of N aC l and KC l from 293. 15K to 323. 15K are repo rted. T he param eters of den sit ies and visco sity B coefficien ts have been calcu la ted by regressio n. T he experim en ta l resu lt s show that den sit ies and visco sit ies decrease w ith the increasing of tem peratu re at the sam e concen t rat io n s of N aC l, KC l and gluco se, and increase w ith the increasing of concen t rat io n of gluco se at the sam e tem peratu re and the sam e concen t rat io n s of N aC l and KC l. B coefficien ts increase w hen the concen t rat io n of gluco se and tem peratu re increase. Fu rthe rm o re, the te rm s of so lu te2so lven t in teract io n s in ternary w ater2g luco se2e lectro lyte system s are discu ssed, w h ich show that the tw o electro lytes are structu re2b reakers o r structu re2m ak ings fo r the gluco se aqueou s so lu t io n s. Key words: gluco se; den sity; visco sity; sodium ch lo ride; po tassium ch lo ride 随着生物化工的发展, 有机物水溶液热