摘要
采用阳极氧化法对聚丙烯腈(PAN)基炭纤维进行表面改性,利用原子力显微镜(AFM)、X射线光电子能谱(XPS)、扫描电子显微镜(SEM)和动态力学热分析(DMTA)对炭纤维表面改性效果进行了研究。研究结果表明,炭纤维经适当的阳极氧化表面改性后,表面的粗糙度和比表面积增大,表面羟基含量提高31%,羰基含量提高61%。表面改性炭纤维增强树脂基复合材料(CFRP)较未改性炭纤维CFRP,玻璃化温度(Tg)升高,损耗角正切峰值(tanδmax)降低,定量计算出的界面黏结参数A和α与CFRP的层间剪切强度(ILSS)所反映的炭纤维与树脂间界面黏结效果一致。采用适当的改性条件可使CFRP的ILSS提高25%,纤维抗拉强度仅损失5%。
The surface of polyacrylonitrile （PAN） -based carbon fibers （CFs） was modified by anodic oxidation and characterized by atomic force microscopy, X-ray photoelectron spectroscopy, scanning electron microscopy and dynamic mechanical thermal analysis. It was found that the roughness and specific surface area of the carbon fibers were increased after oxidation treatment. The contents of hydroxyl and carbonyl groups of the treated PANCFs were higher than those of the untreated ones. The loss tangent peak value （ tan δmax ） of the treated carbon fiber reinforced epoxy resin composites （CFRP） declined compared with the untreated ones, and the glass transition temperature of the epoxy resin was increased. The interlaminar shear strength （ ILSS ） of the CFRP can be increased by 25 % under an appropriate oxidative treatment, and the loss of tensile strength was only 5 %. The interfacial adhesion parameters A and α were quantitatively evaluated, and their values were consistent with the results of ILSS of CFRP.
出处
《新型炭材料》
SCIE
EI
CAS
CSCD
北大核心
2006年第4期343-348,共6页
New Carbon Materials
基金
国家自然科学基金重点项目(50333070)
国家自然科学基金(50673011)。~~
