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用频率为11.4兆赫兹的超声波研究了明胶水溶液的超声性质。超声吸收的浓度曲线表明,一直到重量百分比浓度c=8.5％时超声吸收也没达到饱和值。当溶液浓度大于1.5％时,在室温下它们都可以转变成冻胶,而且在整个转化过程中超声吸收值不变。当溶液的温度下降到接近冻点时,溶液的粘滞系数随时间逐渐增大,从而使声吸收的经典理论值可能超过实验值几个数量级;但当溶液温度适当高于冻点时,经典声吸收理论值可能小于实验值而处于同一数量级。浓溶液(c=6.4％)超声速度的温度极大值与纯水中声速温度极大值没有什么明显的不同。文中对所有被观测到的这些现象进行了讨论。
Ultrasound properties of gelatin aqueous solutions were investigated using ultrasound at a frequency of 11.4 MHz. The concentration curve of the ultrasound absorption shows that the ultrasound absorption did not reach the saturation value until the weight percentage concentration c = 8.5%. When the solution concentration is more than 1.5%, they all can be converted to jelly at room temperature, and the ultrasonic absorption value does not change throughout the conversion. When the solution temperature drops to near the freezing point, the viscosity of the solution gradually increases over time, so that the classical theoretical value of the acoustic absorption may exceed the experimental value of several orders of magnitude; but when the solution temperature is appropriately higher than the freezing point, the classic Acoustical absorption theoretical value may be less than the experimental value in the same order of magnitude. Concentration solution (c = 6.4%) The maximum temperature of the ultrasonic velocity and pure water in the sound velocity temperature maximum value is not significantly different. All the observed phenomena are discussed in this article.