Brookfield粘度计测定微生物多糖发酵液流体特性参数  

Study on Measuring Rheological Properties in Microbial Polysaccharide Fermentation Broth by Using Rotational(Brookfield Type) Viscometer

作　　者：蒋芸[1,2] 詹晓北[1,2] 李艳[1,2] 郑志永[1,2] 

机构地区：[1]江南大学工业生物技术教育部重点实验室,江苏无锡214122 [2]江南大学生物工程学院,江苏无锡214122

出　　处：《食品与生物技术学报》2008年第5期73-77,共5页Journal of Food Science and Biotechnology

基　　金：国家863计划项目(2006AA02Z207);上海市科技攻关项目(054319940)

摘　　要：以典型的假塑性流体黄原胶和威伦胶为测试标样,通过Brookfield粘度计测量流体在不同转速下的粘度,结合推导的数学公式,求得非牛顿流体的流变特性参数。建立的方法可以用于测定发酵液的流变特性参数n和浓度系数k,并建立了流变学参数与多糖浓度的函数关系,根据计算结果推导出的模型能够评价流体的流变性能,所采用的数据处理方法及所获得的结论对非牛顿流体的研究具有一定的意义。In order to conveniently describe the rheological properties, an efficient and cost- effective method for determining the rheological behavior indexes of non-Newtonian fluid was developed. Taking the xanthan gum and welan gum as the research model, the indexes of typical pseudoplastic fluid were obtained through viscosity values using Brookfield viscometer and mathematical derivation. By using the method, both fluid consistency factor k and flow behavior index n could be derived and described by functions of polysaccharide concentration c. The mathematical model deduced using this method highly agreed with the rehological behaviors of polysaccharide fermentation broth. The data processing method and the results were useful for characterizing the flow behavior of non-Newtonian fluid.

关 键 词：非牛顿流体 流变学特性 假塑性 

分 类 号：TS202.3[轻工技术与工程—食品科学]