Liu Yu, Zhang Dong-Dong, Cui Guang-Yuan, Luo Rui-Ying, Zhao Dong-Lin
Research Institute for Frontier Science, Beihang University, Beijing 100029, China.
State Key Laboratory of Chemical Resource Engineering, Key Laboratory of Carbon Fiber and Functional Polymers, Ministry of Education, Beijing University of Chemical Technology, Beijing 100029, China.
Nanomaterials (Basel). 2020 Aug 26;10(9):1670. doi: 10.3390/nano10091670.
Ammonia modified graphene-carbon nanotubes/continuous carbon fiber reinforced epoxy unidirectional multiscale composites (AMGNS-MWCNT/CFEP) were prepared by adding ammonia modified graphene and carbon nanotubes to an epoxy matrix to reduce agglomeration of carbon nanofillers in the epoxy matrix and improve composites properties. Fourier transform infrared spectroscopy (FTIR), scanning electron microscope (SEM), and universal testing machines were used to characterize the properties of carbon nanofillers, AMGNS-MWCNT/epoxy nanocomposites, and AMGNS-MWCNT/CFEP unidirectional composites. When the AMGNS-MWCNT content was 1.0 wt%, flexural strength, the flexural modulus and interlaminar shear strength of AMGNS-MWCNT/CFEP unidirectional composites reached the maximum value of 1520.3 MPa, 138.88 GPa, and 87.80 MPa, respectively, which were 12.5%, 9.42%, and 10.1% higher than that of carbon fiber reinforced epoxy unidirectional composites (CFEP). The synergistic mechanism of two carbon nanofillers in the matrix is discussed.
通过向环氧树脂基体中添加氨改性石墨烯和碳纳米管，制备了氨改性石墨烯-碳纳米管/连续碳纤维增强环氧单向多尺度复合材料（AMGNS-MWCNT/CFEP），以减少碳纳米填料在环氧树脂基体中的团聚并改善复合材料性能。利用傅里叶变换红外光谱（FTIR）、扫描电子显微镜（SEM）和万能试验机对碳纳米填料、AMGNS-MWCNT/环氧纳米复合材料以及AMGNS-MWCNT/CFEP单向复合材料的性能进行了表征。当AMGNS-MWCNT含量为1.0 wt%时，AMGNS-MWCNT/CFEP单向复合材料的弯曲强度、弯曲模量和层间剪切强度分别达到最大值1520.3 MPa、138.88 GPa和87.80 MPa，分别比碳纤维增强环氧单向复合材料（CFEP）高出12.5%、9.42%和10.1%。讨论了两种碳纳米填料在基体中的协同作用机制。
