摘要
通过改变阳极氧化处理程度得到了具有不同表面结构的碳纤维,然后将其与环氧树脂加工成碳纤维/树脂基复合材料,研究了碳纤维的化学结构与湿热环境下复合材料吸湿之间的关系。结果显示:阳极氧化处理后碳纤维表面的活性显著提高,碳纤维表面含氧官能团的含量大幅增加,尤其是–OH由处理前18.62%提高到处理后的34.84%。随着湿热处理条件的改变,复合材料的吸湿机理也有所差异,且温度是影响复合材料吸湿的重要因素。碳纤维表面活性越高,复合材料达到吸湿平衡时的平衡吸湿量越大,而平衡吸湿量的增加又会导致复合材料层间剪切强度(ILSS)下降幅度增大。
Carbon fibers with different surface structures were obtained through changing the treatment intensities in the process of electrochemical oxidation, and then oxidized carbon fibers were used as reinforcements to manufacture carbon fiber/epoxy composites. The relationship between fiber surface structure and the moisture absorption of carbon fiber/epoxy composites after hygrothermal aging treatment was studied. Results show that a significant increase happen to the surface activity of carbon fiber after electrochemical oxidation, and there is also a large extent of elevation in the relative content of oxygen-containing functional groups especially -OH group which increases from 18.62% to 34.84%. The moisture absorption mechanism of carbon fiber/epoxy composites varies with the change of hygrothermal aging conditions. Temperature is considered to be a leading factor in the moisture absorption process. Results also indicate that the higher the surface activity of carbon fiber, the greater composite ma- terials get the equilibrium moisture content. There is an obvious decline in the ILSS values of carbon fiber/epoxy composites with the increase of moisture uptake content.
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
2013年第2期189-194,共6页
Journal of Inorganic Materials
基金
国家重点基础研究发展计划资助项目(2011CB605602)
浙江省重点科技创新团队项目(2011R50013)~~
关键词
碳纤维
复合材料
表面结构
湿热性能
carbon fiber
composites
surface structure
hygrothermal performance
