含喷雾干燥淀粉纳米粒混悬液中 NaCl 对其流变学性质的影响。
The effect of NaCl on the rheological properties of suspension containing spray dried starch nanoparticles.
机构信息
College of Engineering, China Agricultural University, P.O. Box 50, 17 Qinghua Donglu, Beijing 100083, China.
出版信息
Carbohydr Polym. 2012 Nov 6;90(4):1530-7. doi: 10.1016/j.carbpol.2012.07.025. Epub 2012 Jul 16.
The effect of NaCl on the rheological properties of suspensions containing spray dried starch nanoparticles produced through high pressure homogenization and emulsion cross-linking technique was studied. Rheological properties such as continuous shear viscosity, viscoelasticity and creep-recovery were measured. NaCl (5-20%, w/w) was found to lower viscosity quite significantly (p<0.05), enhance the heat stability and weaken their gelling behavior compared to starch-only suspension. NaCl reduced both the storage and loss moduli of suspension within the frequency range (0.1-10 rads/s) studied. However, NaCl brought higher speed of reduction on the storage modulus than on the loss modulus, which resulted into large increase in loss angle. The creep-recovery behavior of suspension was affected by NaCl and the recovery rate was highest (86%) at 15% NaCl. The Cross, the Power law and the Burger's models followed the experimental viscosity, storage and loss moduli, and creep-recovery data well with R(2)>0.97.
研究了通过高压均质和乳液交联技术制备的喷雾干燥淀粉纳米颗粒悬浮液中 NaCl 对其流变性能的影响。测量了连续剪切粘度、粘弹性和蠕变恢复等流变性能。与仅含淀粉的悬浮液相比，NaCl（5-20%，w/w）显著降低了粘度（p<0.05），提高了热稳定性，并削弱了其胶凝行为。NaCl 在研究的频率范围内（0.1-10 rads/s）降低了悬浮液的储能模量和损耗模量。然而，NaCl 使储能模量的降低速度高于损耗模量，导致损耗角显著增加。悬浮液的蠕变恢复行为受 NaCl 影响，在 15%NaCl 时，恢复率最高（86%）。Cross、Power 定律和 Burger 模型很好地拟合了实验粘度、储能模量和损耗模量以及蠕变恢复数据，R(2)>0.97。
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