摘要
采用γ射线辐照法、电化学聚合法改性碳纤维表面,研究了以三缩四乙二醇为接枝单体,在不同的辐照剂量下辐照处理碳纤维,以及电化学聚合衣康酸改性碳纤维。利用扫描电子显微镜、X光电子能谱仪、电子万能试验机研究了处理前后的碳纤维的表面形貌、复合材料的断面形貌、表面化学组成及复合材料层间剪切强度(ILSS)的变化。研究结果表明,2种处理方法都能有效提高碳纤维表面活性,与环氧树脂的浸润性提高,复合材料断面纤维拔出明显减少。在200kGy的辐照剂量下处理得到的碳纤维与环氧树脂复合材料的ILSS的提高幅度最大,达到31.2%。同时经电聚合处理后的碳纤维与环氧树脂复合材料的ILSS的提高幅度要大于经γ射线辐照处理后的试样,达到40%。
By γ-ray irradiation and electrochemical polymerization, the surface of carbon fiber were modified. Tetraethylene glycol was used as graft monomer. Scanning electron microscopy （SEM）, X-ray photoelectron spectroscopy （XPS） and electronic universal testing machine were used to study the changes in the surface morphology, the fracture surface of carbon fiber composites, the surface chemical composition and interlaminar shear strength（ILSS） of the composite materials before and after the modification. The results show that both treatments can effectively increase the surface activity of carbon fiber, and improve wettability and significantly reduce the cross-section fiber pullout of epoxy resin/carbon fiber composites. Also, ILSS is improved significantly. Especially at the radiation dose of 200 kGy, ILSS of epoxy resin /carbon fiber composites improves the most, 31.2%. Meanwhile, after the treatment of electro-polymerization, ILSS improvement for epoxy resin/carbon fiber composites（～40%） is greater than that for the sample treated by γ-ray irradiation.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2014年第2期16-20,共5页
Polymer Materials Science & Engineering
基金
国家自然科学基金资助项目(51073098)
关键词
碳纤维
Γ射线辐照
电化学聚合
复合材料
carbon fiber
y-ray irradiation
electrochemical polymerization
composites
