玄武岩纤维表面改性对生物膜附着性能的影响

Effect of surface modification of basalt fiber on biofilm attachment

采用壳聚糖对玄武岩纤维(BF)进行表面改性处理,研究改性后玄武岩纤维对生物膜附着性能的影响。利用红外光谱、X射线光电子谱仪、扫描电镜等对改性前后玄武岩纤维的表面官能团、成分和形貌进行表征分析,通过接触角测量仪对样品的亲水性进行研究,最后通过挂膜实验,讨论生物膜在改性前后玄武岩纤维上的附着性能。结果表明:采用物理涂覆法可成功制备改性玄武岩纤维(MBF),所制得的MBF表面粗糙度为209.04nm,接触角为66.62°。MBF表面形成的生物膜均匀致密,生物膜附着量明显增大,挂膜率由(129.27±1.23)%增加至(179.92±2.63)%,说明壳聚糖改性玄武岩纤维可以有效提升生物膜的附着性能。

Basalt fiber(BF) was modified with chitosan to investigate the influence of the surface modification on biofilm attachment properties. The surface functional groups, composition and morphology were characterized by Fourier transform infrared spectroscopy (FTIR), X-ray photo-electron spectroscopy (XPS) and scanning electron microscopy (SEM). Furthermore, the hydrophi-licity of BF was analyzed by contact angle measurement and the biofilm attachment properties were discussed via the microorganism immobilization tests. The results show that the surface-modified basalt fiber (MBF) can be successfully prepared by physical coating method. The surface roughness of MBF is209.04nm, and the contact angle of MBF is 66.62°. Moreover, the biomass attached on MBF surface is significantly increased and the biofilm is relatively dense and homogeneous. The micro-organism immobilization rate is increased from (129.27±1.23)% to (179.92±2.63)%, thus illustr- ating that surface modification of basalt fiber can significantly improve biofilm attachment properties.