| 精炼工艺对菜籽油流变特性的影响 |
| |
| 引用本文： | 刘昌盛,杨湄,黄凤洪,郑畅,周琦.精炼工艺对菜籽油流变特性的影响[J].中国油料作物学报,2012,34(1):87-91. |
| |
| 作者姓名： | 刘昌盛 杨湄 黄凤洪 郑畅 周琦 |
| |
| 作者单位： | 中国农业科学院油料作物研究所, 湖北 武汉430062
|
| |
| 基金项目： | 国家油菜现代产业技术体系(nycytx-005);国家“十一五”科技支撑计划课题(2009BAD9B08);中国农业科学院油料作物研究所所长基金(1610172009002) |
| |
| 摘 要： | 以菜籽毛油为原料，分析了脱胶、脱酸、脱色和脱臭（四脱精炼）对菜籽油流变特性以及品质的影响。研究结果表明，四脱精炼对菜籽油的脂肪酸组成和折光指数无显著影响；在恒温下，随着剪切速率的增加，菜籽油的粘度先逐渐减小再趋于稳定，即菜籽油是由非牛顿流体逐渐向牛顿流体转化；同时在大范围的剪切速率下，剪切应力与剪切速率呈近线性关系，菜籽油为牛顿流体；精炼所导致的菜籽油粘度差别与微量成分相关，并且精炼可以降低菜籽油的屈服应力值；Herschel-Bulkley的简化方程xy=o+K(dVx/dY)或者Bingham方程相对适宜用于表征菜籽油在四脱精炼过程中的流变特性。
|
| 关 键 词： | 菜籽油 精炼 流变特性 流变模型 |
Effects of refining on rheological properties of rapeseed oils |
| |
| LIU Chang-sheng
,
YANG Mei
,
HUANG Feng-hong
,
ZHENG Chang
,
ZHOU Qi.Effects of refining on rheological properties of rapeseed oils[J].Chinese Journal of Oil Crop Sciences,2012,34(1):87-91. |
| |
| Authors: | LIU Chang-sheng YANG Mei HUANG Feng-hong ZHENG Chang ZHOU Qi |
| |
| Institution: | (Oil Crops Research Institute,CAAS,Wuhan 430062,China) |
| |
| Abstract: | In order to understand the effects of refining on rheological properties of oil and fats,rheological property and quality of rapeseed oil were studied after degummed,deacided,bleached and deodorized.Fatty acid composition and refractive index showed no significant difference(P>0.05) among tested rapeseed oils.When shear rate increased,oil viscosity decreased gradually and then stabilized at a constant temperature,indicating that rapeseed oil was gradually converted to Newtonian fluid from non-Newtonian fluid.According to the nearly linear relationship of shear stress and shear rate,rapeseed oil showed to be Newtonian fluid under a wide range of shear rate.Changes of viscosity due to refining was related to trace elements contents,and refining reduced yield stress values.The Bingham model and simplified equation of Herschel-Bulkley τxy=τo+K(dVx/dY) were both suitable to describe rheological behavior of the rapeseed oils under refining. |
| |
| Keywords: | Rapeseed oil Refine Rheological properties Rheological model |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《中国油料作物学报》浏览原始摘要信息 |
| 点击此处可从《中国油料作物学报》下载免费的PDF全文 |
