【作者】 包艳玲； 戴光泽； 闫春江； 李美霞； 牛正帅； 谢鹏；

【Author】 BAO Yan-ling,DAI Guang-ze,YAN Chun-jiang,LI Mei-xia,NIU Zheng-shuai,XIE Peng (School of Materials Science and Engineering,Southwest Jiaotong University,Chengdu 610031,China)

【机构】 西南交通大学材料科学与工程学院；

【摘要】 通过对高强型聚丙烯腈基炭纤维的液相氧化与金属阳离子吸附的复合表面改性,发现经复合改性的炭纤维对水中微生物固着性能更好。用激光共聚焦显微镜、X射线光电子能谱、平衡含水率等对改性前后炭纤维的表面形貌、含氧官能团和亲水性等表面特性进行了表征,并结合挂膜率、残余挂膜率和化学需氧量去除率的测定,分析了影响炭纤维微生物固着的主要因素。结果表明,经液相氧化后,炭纤维表面亲水性与粗糙度的提高有助于微生物固着且固着量增加;羧基含量的增加有助于提高微生物的固着强度;经复合表面改性后,阳离子对炭纤维表面负电性含氧官能团和微生物胞外多聚物的桥接作用可提高微生物的固着强度,从而提高炭纤维对于水中微生物的固着能力。更多还原

【Abstract】 In this paper,by using PAN-based carbon fiber(CF) with different modifications as biofilm carriers, duplex modification consisted of surface oxidation and metalion-adsorption was proved to be the best method of suface treatment for CF carrier.CF surface characteristics represented by laser confocal microsopy(LCM),X-ray photoelectron spectrum(XPS) and the degree of moisture,and analysis of immobilization of microorganisms show that increasing surface hydrophilicity and roughness is good for biofilm formation,the O-C=O group on CF surface is helpful in enhance the adhesion strength of microorganisms,and metalions adsorbed on CF surface my enhance the immobilization strength of microorganisms by connecting electronegative oxygen groups on CF surface and extracellular polymeric substances(EPS) which is also electronegative.更多还原