摘要
利用MCR101流变仪研究了质量分数、pH、蔗糖、NaCl、温度对藻酸丙二醇酯(PGA)流变学特性的影响。结果表明:藻酸丙二醇酯溶液是假塑性流体,其流动特性符合Power-law模型,其粘度随PGA质量分数和蔗糖浓度的增加而升高;随剪切速率、pH、温度的增加而降低;在较低NaCl浓度下(0.01和0.1mol/L),PGA溶液粘度降低,NaCl浓度在1mol/L时,溶液粘度增加。PGA溶液具有一定的触变性和粘弹性,在低频率区域体系以粘性为主,高频率区域体系以弹性为主,G′和G″的交点受PGA浓度、pH和温度的影响。
A MCR-101 remoter was used to determine under various conditions concentration, pH, sucrose, salt the rheological properties of Propylene glycol alginate and temperature. The results showed that the Propylene glycol alginate solution behaved as pseudo plastic fluid and could be fitted by Powerl-Law model ,the viscosity of Propylene glycol alginate increased with the increasing of concentration and sucrose content, decreased with the increasing of shearing rate,pH and temperature^first decreased at the lower concentration （0.01 and 0.1mol/L） of NaCl and increased at the concentration of 1mol/L. Propylene glycol alginate had thixotropism and viscoelasticity,which primarily behaved viscosity in the low frequency area system and elasticity in the higher one. the point of intersection of G＇ and G＂ was influenced by concentration,pH and temperature.
出处
《食品工业科技》
CAS
CSCD
北大核心
2014年第10期319-323,共5页
Science and Technology of Food Industry
基金
山东省优秀中青年科学家科研奖励基金(BS2012HZ018)
关键词
藻酸丙二醇酯
流变性质
粘度
粘弹性
Propylene glycol alginate
rheological properties
viscosity
viscoelasticity
