表面自由能在环境微生物粘附研究中的应用进展

Progress on the application of surface free energy to the adhesion of environmental microorganisms

摘要:

在环境领域中，对微生物粘附的利用和控制越来越受到研究者的关注。其中，微生物的表面自由能作为细胞表面重要特性，对微生物的粘附行为有重要影响。本文总结了微生物粘附过程中涉及的热动力学理论、Derjaguin-Landau-Verwey-Overbeek (DLVO)以及扩展DLVO理论，阐述了微生物表面自由能在该过程的重要性。基于此，介绍了接触角表征微生物表面自由能的方法体系及影响因素；分析了微生物表面自由能及其分量的分布特征、与物质组成的关系。最后根据被粘附对象的不同，总结了环境微生物表面自由能在固体基质、液体基质或者微生物相互之间粘附中的应用；指出未来研究发展的方向应关注环境微生物表面自由能的标准化表征及其在复杂环境中的应用。

Abstract:

The use and control of microbial adhesion in environmental area have been received greater attention from researchers. Microbial cell surface free energy, as one of cell surface properties, has important influence on adhesion behavior of microorganisms. This article highlights the role of surface free energy on microbial adhesion through thermodynamic approach, Derjaguin-Landau-Verwey- Overbeek (DLVO) theory and extended DLVO (XDLVO). Based on these theories, the characterization method of microbial surface free energy calculated from contact angle and its influencing factors are introduced. Besides, it analyses the distribution feature of microbial surface free energy, its components and its relationship with substances composition. Finally, this review summarizes the application of surface free energy in environmental microorganisms’ adhesion, including adhesion on solid substrates, liquid substrates and adhesion between microorganisms according to adhesion substrates. Feature research should pay more attention to the standard characterization method of environmental microorganisms’ surface free energy and its application in complex circumstances.