摘要
采用阳极氧化法对炭纤维进行连续表面改性,并在其表面进行电镀镍处理,利用扫描电子显微镜(SEM)、X射线衍射(XRD)、热重分析和酸碱滴定等方法研究了炭纤维阳极氧化前后的物理化学结构及对炭纤维电镀镍镀层的影响。结果表明:经过阳极氧化处理后,炭纤维表面的总酸性官能团提高约10倍;炭纤维拉伸强度降低先慢后快;阳极氧化可以改善镀层的生长过程,使镍镀层的生长由(V-W)模式转变为(F-M)模式,并且促使镀层晶粒细晶化,N i晶粒尺寸由14.5nm降为11.2nm,提高了镀镍炭纤维的抗氧化性以及镀层与炭纤维的结合力,阳极氧化后镀镍的炭纤维初始氧化温度较镀镍炭纤维提高了50℃。
PAN-based carbon fibers were continuously treated by anodic oxidation followed by electrodeposition of Ni on their surface.The influence of anodic oxidation on mechanical properties,surface morphology,amount of surface acidic groups and growth mode of the Ni coating were studied by SEM,XRD,TG and conductometric titration.Results showed that the total amount of surface acidic groups on the oxidized carbon fibers is about 10times as large as that of the untreated ones and the tensile strength of carbon fibers decreased slowly at first and then quickly with increasing depth of oxidation.The growth mode of the Ni coating changed from a Volmer-Weber mode to a Frank-van der Merwe mode and the grain size of the Ni coating decreased from 14.5 to 11.2nm for the untreated and treated carbon fibers respectively.The oxidation resistance of the carbon fibers was improved by the Ni coating.The initial oxidation temperature of the Ni-coated treated-carbon fibers with anodic oxidation is about 50℃ higher than that of the Ni-coated carbon fibers without the oxidation.Appropriate oxidation could improve the adhesion between the Ni coating and the carbon fibers.
出处
《新型炭材料》
SCIE
EI
CAS
CSCD
北大核心
2010年第6期454-459,共6页
New Carbon Materials
关键词
炭纤维
阳极氧化
镍镀层
晶粒尺寸
氧化行为
Carbon fiber
Aanodic oxidation
Ni coating
Grain size
oxidation behavior
