磷脂
吸附
表面张力
化学
蛋白质吸附
化学工程
下降(电信)
色谱法
热力学
有机化学
膜
生物化学
计算机科学
电信
物理
工程类
作者
Qiang He,Yi Zhang,Gang Lü,R. Miller,Helmuth Möhwald,Junbai Li
标识
DOI:10.1016/j.cis.2007.12.004
摘要
Drop profile analysis tensiometry is applied to study the adsorption dynamics of phospholipids, proteins and phospholipid/protein mixtures at liquid/liquid interfaces. Measurements of the dynamic interfacial tension of phospholipid layers give information on the adsorption mechanism and the structure of the adsorption layer. The equilibrium and dynamic adsorption of pure protein solutions, i.e. human serum album (HSA), beta-lactoglobulin (beta-LG), beta-casein (beta-CA), can be explained well by the thermodynamic model of Frumkin and the diffusion-controlled adsorption theory. The adsorption behavior from mixed phospholipid/protein solutions was also investigated in terms of dynamic interfacial tensions. Interestingly, a "skin-like" folded film of pure protein or phospholipid/protein complex layers can be observed at curved surfaces at the water/oil interfaces. The addition of phospholipids accelerates the formation of the folded structure at the drop surface through co-adsorption of proteins.
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