聚酰胺酸沉积碳纤维作为生物膜载体的研究  

Preparation of polyamic acid electrodeposited carbon fiber supports as biofilm carriers

作　　者：张超 柳琦杰 戴光泽[1] ZHANG Chao;LIU Qi-jie;DAI Guang-ze(School of Material Science and Engineering,Southwest Jiaotong University,Chengdu 610031,China)

机构地区：[1]西南交通大学材料科学与工程学院,四川成都610031

出　　处：《高校化学工程学报》2020年第5期1228-1234,共7页Journal of Chemical Engineering of Chinese Universities

摘　　要：为提高碳纤维作为生物膜载体对微生物的固着能力,采用电泳法在其表面沉积聚酰胺酸薄膜而得到改性碳纤维,并通过大肠杆菌固着实验、DLVO(Derjaguin-Landan-Verwey-Overbeek)理论计算及挂膜实验评价碳纤维载体的固着能力。实验结果表明:沉积聚酰胺酸后,载体表面粗糙度增加,含氧和含氮官能团的含量提升,固着大肠杆菌数量增加,与微生物之间的总势能明显降低。在3种改性碳纤维中,羧基摩尔比为2.0的载体固着能力最强,每g载体固着3.8 g污泥,是原生碳纤维挂膜量的两倍以上。因此,聚酰胺酸改性碳纤维可作为具有高生物亲和性的载体材料。In order to improve immobilization capacity of carbon fiber(CF)supports as biofilm carriers,polyamic acid was electrodeposited on the surface.The immobilization capacity was studied by E.coli immobilization assays,DLVO(Derjaguin-Landan-Verwey-Overbeek)theoretical calculations and activated sludge immobilization tests.The experimental results show that after the deposition of polyamic acid,the surface roughness of CF supports increases together with the number of oxygen-containing and nitrogen-containing functional groups.Meanwhile,the amount of immobilized E.coli also increased and the total interaction energy between CF supports and E.coli was greatly decreased.Among three modified CF supports,when the carboxyl molar ratio was 2.0,the immobilization capacity was the strongest and the amount of sludge on one gram of CF support can reach about 3.8 grams,which was more than twice of that of the raw carbon fibers.Therefore,CF supports with polyamic acid are of great potential as biofilm carriers.

关 键 词：碳纤维 聚酰胺酸 微生物固着 DLVO理论 

分 类 号：TU992.3[建筑科学—市政工程]