褐藻酸钠溶液的超声辐照效应及其对分子量参数的影响

观察了超声辐照过程中褐藻酸钠溶液的pH值、温度、表现特性粘度和表现分子量及其分布的变化,发现在超声辐照过程中,褐藻酸钠的表现平均分子量经历了下降→回升→再下降的过程;当超声辐照停止后,表现特性粘度和表观平均分子量又略有回升,因而推测在这一过程中褐藻酸钠的构象可能发生了变化。

The Effect of Ultrasonication in Molecular Weight Parameters of Sodium Alginate Solution

In the ultrasonication the pH of the sodium alginate solution was stable,its temperature increased,and its apparent intrinsic viscosity decreased, and a change of three steps of decreasing, raising, and redecreasing occured in apparent average molecular weight of the sodium alginate. After the ultrasonication the apparent intrinsic viscosity and the apparent average molecular weight raised slightly we inferred that the conformation of the sodium alginate was changed under the condition.