【摘要】 研究了低浓度白芨葡甘聚糖(BSG)溶液的流变性与多糖浓度、外加电解质浓度、pH值及温度等的相关性。结果表明,BSG水溶液在2～16g.L-1时是假塑性流体。在低剪切速率下(γ.<1s-1),溶液的表观黏度η迅速降低;剪切速率增大(γ.>1s-1),溶液的η达到稳定(ηs)。在高剪切速率下溶液的ηs随浓度的增加而增加。向溶液中加入电解质,或者改变pH值,都不会影响ηs。对质量浓度为16g.L-1的BSG溶液,升高温度,η降低,η与温度的关系符合Arrhenius方程。更多还原

【Abstract】 The effect of polysaccharide concentration,electrolyte concentration,pH value and temperature(T) on the rheological behaviors of Blettila striata polysaccharide solutions was studied.The solutions of polysaccharide concentration between 2 and 16 g·L-1 were pseudoplastic fluids.The apparent viscosity(η) of solutions decreased with increasing shear rate(γ·) in the range of γ·<1s-1;while η became constant(ηs) for γ·>1s-1.ηs rose with polysaccharide concentration,while salt concentration and pH had nothing to do with ηs.ηof solution at 16 g·L-1 lowered with rising T.The relationship between η and T conformed to the Arrhenius equation.更多还原