表面材料性质对生物垢形成过程的影响

为找到表面材料性质与生物垢形成难易程度之间的关联因素，以设计出能控制生物垢形成速率的新表面材料，对水系统中荧光假单胞菌在17种表面材料上形成生物垢的动态过程进行了实验研究，获得了生物的生长曲线，并将生长曲线划分为诱导期和生物垢快速生长期。发现表面材料不同，形成生物垢的诱导期及生物垢量也不尽相同。还对9种表面材料的表面能和界面能进行了实验测定及相关计算。结果表明，只有固体材料与生物垢之间的固－固界面能与生物垢形成之间有明确的关系，而未发现材料的表面能和固体材料与液体水之间的固液界面能与生物垢形成的诱导期或生物垢量之间有任何明确的关系。

Effect of surface materials on biofilm formation

Biofilm development can be significantly influenced by surface material. In order to find the factors which can correlate the relationship between surface characteristics and biofilm formation, and to design novel surface materials which can be used to control biofilm development, it is important to study the evolution processes of biofilm formed on different surface materials. The dynamic processes of biofilm of pseudomonas fluorescens on 17 kinds of surface materials were investigated experimentally in this paper. The evolution curves of biofilm development were obtained. In addition, the induction period and the biofilm thickness or biomass were found from these evolution curves. The results show that the induction period and biofilm mass on different surface materials are quite distinct. The surface free energy and the interfacial energy for 9 kinds of surface materials were measured and calculated to find the relation between the biofilm development and these parameters. The results indicate that, however, only the interfacial energy between solid surface material and biofilm has some relations with the biofilm mass while other surface material and the interfacial energy have no clear relations with the biofilm formation.