Li Xiaodong, Wang Qi, Cui Xu, Feng Xinwen, Teng Fei, Xu Mingyao, Su Weiguo, He Jun
College of Aerospace Engineering, Shenyang Aerospace University, Shenyang 110136, China.
College of Civil Aviation, Shenyang Aerospace University, Shenyang 110136, China.
Polymers (Basel). 2022 Sep 1;14(17):3618. doi: 10.3390/polym14173618.
The mechanical properties of epoxy resin can be enhanced by adding nanofillers into its matrix. This study researches and compares the impacts of adding nanofillers with different dimensions, including two-dimensional boron nitride and zero-dimensional silica, on the mechanical and toughness properties of epoxy resin. At low fractions (0-2.0 wt%), 2DBN/epoxy composites have a higher Young's modulus, fracture toughness and critical strain energy release rate compared to SiO/epoxy composites. However, the workability deteriorated drastically for BN/epoxy composites above a specific nanofiller concentration (2.0-3.0 wt%). BN prevents crack growth by drawing and bridging. SiO enhances performance by deflecting the crack direction and forming voids. Additionally, the dimension and content of nanofiller also influence glass transition temperature and storage modulus significantly.
通过在环氧树脂基体中添加纳米填料，可以提高其机械性能。本研究对添加不同尺寸的纳米填料（包括二维氮化硼和零维二氧化硅）对环氧树脂机械性能和韧性的影响进行了研究和比较。在低含量（0-2.0 wt%）时，与SiO/环氧树脂复合材料相比，2DBN/环氧树脂复合材料具有更高的杨氏模量、断裂韧性和临界应变能释放率。然而，当纳米填料浓度超过特定值（2.0-3.0 wt%）时，BN/环氧树脂复合材料的加工性能急剧恶化。BN通过拉伸和桥接来阻止裂纹扩展。SiO通过使裂纹方向偏转和形成空隙来提高性能。此外，纳米填料的尺寸和含量也对玻璃化转变温度和储能模量有显著影响。
