超微粉碎对谷朊粉理化特性及功能特性的影响

Effect of Ultrafine Comminution on Physico-chemical and Functional Properties of Vital Wheat Gluten

利用气流粉碎机对谷朊粉(WG)进行超微粉碎,对制备的8种不同粒径的谷朊粉的理化和功能特性进行研究。结果表明:粉碎过程中,随着谷朊粉平均粒径的减小,大量水分损失;在500目以下谷朊粉的吸水率随粒径的减小而增大,在500～900目之间吸水率随粒径的减小而减小,超过900目吸水率基本保持不变;谷朊粉的白度值、起泡性能、乳化性能、持水力以及持油力随粒径的减小都有不同程度的提高。实验结果表明谷朊粉经超微粉碎处理能改善它的某些特性,而且不同粒度的谷朊粉的理化特性、功能特性也有一定的差异。

In the present study,vital wheat gluten（WG） was comminuted into 8 different meshes using a jet mill,and effect of comminution degree on physico-chemical and functional properties of WG was examined.Results showed that with decreasing particle size,there was an obvious decrease in moisture content in WG and the water absorbing capacity exhibited an ascending trend below 500 mesh and a descending trend between 900 mesh and 500 mesh and held the line approximately above 900 mesh.Whiteness,foaming properties,emulsifying properties,water holding capacity and oil holding capacity had different increases as particle size decreased.Therefore,ultrafine comminution can improve some properties of VWG and the improvement in physico-chemical and functional properties varies with comminution degree.