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Gelatin surface activity

Time:

Nov 25,2023

Polypeptide chains composed of amino acids have hydrophilic and hydrophobic regions, so that gelatin has appropriate surface activity as well as some surfactants. Studies have shown that the surface tension of gelatin solution is related to its concentration, temperature, pH and other factors. When the concentration of gelatin solution is 1% or less, the temperature is 10~45 ℃, and the solution is formed for less than 1 hour, it is found that the surface tension is the maximum between pH = 2~3, and the minimum surface tension occurs at the isoelectric point. The study also points out that the surface tension decreases linearly with temperature below 30 ℃, decreases more sharply between 30 and 40 ℃, and decreases further with the increasing temperature above 40 ℃, and its decline rate is greater than that of pure water. Where aging occurs, the surface tension will generally decrease with time.

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Nov 22,2023