低浓度亚麻籽胶的流变特性

对低浓度亚麻籽胶溶液的流变特性进行了研究。结果表明 ,亚麻籽胶溶液属于浓度与粘度关系符合指数规律的流体 ,但当其浓度≤ 3g/L时溶液近似牛顿流体 ,浓度 >3g/L时为假塑性流体 ,且随着浓度增加呈现愈强的假塑性流体特征。亚麻籽胶溶液在一定浓度下表现出剪切稀化的特性。低浓度的亚麻籽胶溶液在pH 6～ 8粘度较大 ,酸、碱均使其粘度降低 ,但酸的影响更大。亚麻籽胶溶液粘度对温度有很强的依赖关系 ,粘度随温度的升高而降低。

Study on the Rheology of Low-concentration Lineed Gum

The rheology property of linseed gum solution of low-concentration was studied. The result indicated this fluid behaved like newtonian fluid when its concentration was equal or small than 3g/L while it exhibited characteristics of pseudo-plastic fluid at concentration above 3 g/L. The viscosity of low-concentration linseed gum solution was in accordance with exponent law. At low concentration, linseed gum solution showed the largest viscosity between pH 6～8. Outside this range, its viscosity would be reduced. Arabino-xylan was the major component responsible for the shear thinning and weak gel properties of linseed gum.