Guo Liulong, Yan Hongxia, Chen Zhengyan, Liu Qi, Feng Yuanbo, Ding Fan, Nie Yufeng
Department of Applied Chemistry, School of Natural and Applied Sciences, Northwestern Polytechnical University, Xi'an 710129, China.
Department of Applied Mathematics, School of Natural and Applied Sciences, Northwestern Polytechnical University, Xi'an 710129, China.
Polymers (Basel). 2018 Oct 27;10(11):1199. doi: 10.3390/polym10111199.
A novel graphene-based nanocomposite particles (NH₂-rGO/WS₂), composed of reduced graphene oxide (rGO) and tungsten disulfide (WS₂) grafted with active amino groups (NH₂-rGO/WS₂), was successfully synthesized by an effective and facile method. NH₂-rGO/WS₂ nanoparticles were then used to fabricate new bismaleimide (BMI) composites (NH₂-rGO/WS₂/BMI) via a casting method. The results demonstrated that a suitable amount of NH₂-rGO/WS₂ nanoparticles significantly improved the mechanical properties of the BMI resin. When the loading of NH₂-rGO/WS₂ was only 0.6 wt %, the impact and flexural strength of the composites increased by 91.3% and 62.6%, respectively, compared to the neat BMI resin. Rare studies have reported such tremendous enhancements on the mechanical properties of the BMI resin with trace amounts of fillers. This is attributable to the unique layered structure of NH₂-rGO/WS₂ nanoparticles, fine interfacial adhesion, and uniform dispersion of NH₂-rGO/WS₂ in the BMI resin. Besides, the thermal gravimetrical analysis (TGA) revealed that the addition of NH₂-rGO/WS₂ could also improve the stability of the composites.
通过一种有效且简便的方法成功合成了一种新型的基于石墨烯的纳米复合粒子（NH₂-rGO/WS₂），它由还原氧化石墨烯（rGO）和接枝有活性氨基的二硫化钨（WS₂）组成。然后通过浇铸法使用NH₂-rGO/WS₂纳米粒子制备了新型双马来酰亚胺（BMI）复合材料（NH₂-rGO/WS₂/BMI）。结果表明，适量的NH₂-rGO/WS₂纳米粒子显著提高了BMI树脂的力学性能。当NH₂-rGO/WS₂的负载量仅为0.6 wt%时，与纯BMI树脂相比，复合材料的冲击强度和弯曲强度分别提高了91.3%和62.6%。极少有研究报道痕量填料能对BMI树脂的力学性能有如此巨大的增强作用。这归因于NH₂-rGO/WS₂纳米粒子独特的层状结构、良好的界面粘附以及NH₂-rGO/WS₂在BMI树脂中的均匀分散。此外，热重分析（TGA）表明，添加NH₂-rGO/WS₂还可以提高复合材料的稳定性。
