浙江大学学报（理学版）2017，Vol.44Issue(6)：742-748,7.DOI:10.3785/j.issn.1008-9497.2017.06.014
壳聚糖投加量对白芍水提液絮凝效果的影响研究
Experimental study on the effect of chitosan dosage on flocculation efficiency of water extract of white peony
摘要
Abstract
By changing the dosage of the chitosan ,UV/visible spectrophotometry meter ,laser particle size analyzer , and micro electrophoresis were applied to explore the influence of dosage of chitoson on white peony ' s water-extraction .The flocculation rate ,fractal dimension ,particle size distribution ,and zeta potential were measured to estimate the influence .Experimental results show that the dosage of chitoson is 0 .31 g · L -1 ,and the flocculating rate reaches a maximum value of 80 .88％ .At this time ,the losing ratio of flavones is 10 .67％ ,average particle diameter of supernatant is 5 .42 μm ,zeta potential is -1 .1682 mV which is closest to zero potential ,the fractal dimension of flocs is 1 .463 .The particle imagine velocity (PIV) system was used to record the settling process , thus established the mathematical model of sedimentation process . And , the maximum settling velocity of flocculation process is 0 .3241 mm · s-1 .When the floc characteristic size ranges from 2 .75 to 3 .75 μm ,the flocs have a better settling performance .关键词
壳聚糖/ζ电位/粒度分布/PIV/沉降速度模型Key words
chitosan/zeta potential/particle size distribution/PIV/sedimentation velocity model分类
化学化工引用本文复制引用
张建伟,王新文,冯颖,苏辰长..壳聚糖投加量对白芍水提液絮凝效果的影响研究[J].浙江大学学报（理学版）,2017,44(6):742-748,7.基金项目
国家自然科学基金资助项目(21406142,21476141). （21406142,21476141）
