CF-CNTs多尺度增强体的制备及CF-CNTs/环氧树脂复合材料力学性能  

Preparation of CF-CNTs multi-scale reinforcement and mechanical properties of CF-CNTs/epoxy composites

作　　者：郑林宝 王延相[1,2] 陈纪强 秦建杰[2] 王兴辉[2] 王成国[2] 

机构地区：[1]山东大学材料科学与工程学院材料液固结构演变与加工教育部重点实验室,济南250061 [2]山东大学材料科学与工程学院碳纤维工程技术研究中心,济南250061

出　　处：《复合材料学报》2017年第11期2428-2436,共9页Acta Materiae Compositae Sinica

基　　金：国家自然科学基金(51573087);山东省自然基金(ZR2014EZ001;ZR2011EMM002);山东大学自主创新基金(2016JC004)

摘　　要：利用化学气相沉积(CVD)法在碳纤维(CF)表面生长碳纳米管(CNTs),制备了CF-CNTs多尺度增强体,增强体与环氧树脂(EP)结合得到CF-CNTs/EP复合材料。采用场发射扫描电镜(FESEM)、高分辨透射电镜(HRTEM)等方法研究了不同CVD工艺参数对CF-CNTs多尺度增强体的影响,并研究了不同CVD时间对CFCNTs/EP复合材料力学性能的影响。结果表明:沉积温度为500℃、沉积时间为10min、反应压力为0.02 MPa时,制备得到的多尺度增强体性能最好。CF-CNTs多尺度增强体较未生长CNTs的碳纤维与环氧树脂的浸润性明显提高。在CVD时间为10min时,所得CF-CNTs/EP复合材料的界面剪切强度(IFSS)最大可提高90.6%,层间剪切强度(ILSS)最大可提高24.4%。同时,在制备环氧树脂复合材料过程中碳纤维的不加捻与加捻相比,其ILSS提高了11.3%。The carbon nanotubes （CNTs）were grown on to the surface of carbon fibers （CF）by chemical vapor deposition （CVD）method,the CF-CNTs and CF-CNTs/epoxy （EP）composites were obtained.Effects of different CVD technological parameters on the CF-CNTs multi-scale reinforcement were researched by field emission scanning electron microscopy （FESEM）,high resolution transmission electron microscope （HRTEM）methods and so on. Mechanical properties of CF-CNTs/EP composites with different CVD time were also studied.The results show that the CF-CNTs multi-scale reinforcement with the best performance can be obtained when the deposition tempera-ture is 500℃,the deposition time is 10 min,and the corresponding reaction pressure is controlled about 0.02 MPa. The wettability of the CF-CNTs multi-scale reinforcement to EP is significantly higher than that of CF without CNTs.The interfacial shear strength （IFSS）and interlaminar shear strength （ILSS）can be improved by 90.6% and 24.4%,respectively.At the same time,compared to the twisted CF in preparation process of EP composites,the ILSS of non-twisted CF composites can be increased by 11.3%.

关 键 词：碳纤维 碳纳米管 化学气相沉积 多尺度增强体 力学性能 复合材料 

分 类 号：TQ342.742[化学工程—化纤工业]