摘要
采用扫描电子显微镜、激光拉曼光谱仪、X射线衍射仪和X射线小角散射仪对市场采购的T300及T700碳纤维和实验室自制的SY300及SY700碳纤维的宏观和微观结构进行了表征和分析,比较了这4种碳纤维在宏观和微观之间的差异,并分析了这些差异对拉伸强度的影响。结果表明:宏观方面,拉伸强度与直径成反比关系,其数值大小与直径实验方法密切相关;微观方面,对于不同类型碳纤维的拉伸强度与石墨化程度和微晶厚度成正比,与微晶层间距和微孔大小成反比。对于同类型的碳纤维,其石墨化程度、微晶厚度及层间距相近,微孔尺寸是影响拉伸强度的最主要因素。
The macro and micro-structure of T300, SY300 carbon fibers commercially available and T700, SY700 prepared in our laboratory were characterized and studied by using scanning electron microscopy, laser Raman spectroscopy, X-ray diffraction and X-ray small angle scattering. The differences of 4 carbon fibers between the macro and micro-structure were compared and the influence on tensile strength were analyzed. The results showed that the tensile strength was inversely proportional to the diameter and its value was closely related to the experimental methods of diameter in the macro. In micro, the tensile strength is proportional to the degree of graphitization and microcrystalline thickness, is inversely proportional to microcrystalline layer spacing and the pore size for different type of carbon fiber. For the same type of carbon fiber, data of the graphitization degree, microcrystalline thickness and layer spacing were very close, micropore size was the main factors influencing the tensile strength.
出处
《高科技纤维与应用》
CAS
2016年第5期41-47,共7页
Hi-Tech Fiber and Application
