聚焦光束反射分析仪测定淀粉颗粒粒径分布  

Determination of Diameter Distribution of Starch Granules by FBRM

作　　者：张本山[1] 陈福泉[1] 赵永青 高凌云[1] 陈翠兰[1] 卢海凤[1] 韩忠[1] 

机构地区：[1]华南理工大学轻工与食品学院,广东广州510640 [2]华南理工大学聚合物成型加工工程教育部重点实验室,广东广州510640

出　　处：《华南理工大学学报（自然科学版）》2010年第4期55-60,共6页Journal of South China University of Technology(Natural Science Edition)

基　　金：国家科技支撑计划项目(2006BAD27B04);广东省科技计划项目(2007B080401010)

摘　　要：为了在线监测淀粉在物理或化学处理过程中的粒径变化,研究了淀粉乳浓度、搅拌速率和介质等因素对聚焦光束反射分析仪(FBRM)测定淀粉颗粒粒径分布的影响,分析了不同种类淀粉颗粒的粒径分布曲线以及同种淀粉在不同粒度测定方法下的粒径大小.结果表明:随着淀粉乳浓度的增加,FBRM测得的淀粉颗粒粒径呈现先增加后减小的趋势,淀粉乳浓度为1%时达最大值;搅拌速率对淀粉颗粒粒径测定的影响不显著;采用浓度小于50%的乙醇和异丙醇或浓度高于75%甘油作为介质时,可以得到较为稳定的粒度分布;不同种类的淀粉颗粒具有不同的粒径分布曲线趋势;同种淀粉颗粒在不同粒度测定方法下,粒径大小有一定的差别.In order to monitor the diameter change of starch granules in physical or chemical process on line,the influences of the starch slurry concentration,stirring rate and medium on the distribution of the granule diameter were investigated by means of FBRM.Moreover,the granule diameter distribution curves of different starches and the granule diameters of the same starch measured by different methods were analyzed.The results show that（1） with the increase of starch slurry concentration,the granule diameter measured by FBRM first increases and then decreases,and it reaches its maximum at a slurry concentration of 1%;（2） the stirring rate slightly affects the measurement of the granule diameter;（3） the granule diameter distribution becomes stable when ethanol and isopropanol with a concentration of lower than 50%,or glycerol with a concentration of higher than 75%,is used as the medium;（4） the distribution curves of the granule diameter vary with the starch type;and（5） even for the same starch granule,the measured diameter is inconstant due to different measurement methods.

关 键 词：聚焦光束反射分析仪 淀粉颗粒 粒径 粒径分布 淀粉乳浓度 

分 类 号：TQ235[化学工程—有机化工]