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One-step generation of silica particles onto graphene oxide sheets for superior mechanical properties of epoxy composite and scale application
Composites Communications ( IF 8 ) Pub Date : 2020-12-01 , DOI: 10.1016/j.coco.2020.100514
Mingye Wang , Lichun Ma , Bowen Li , Wenjian Zhang , Hao Zheng , Guangshun Wu , Yudong Huang , Guojun Song

Abstract The one-step generation of nano-silica (SiO2) on graphene oxide (GO) surface via using diethylenetriamine (DETA) and ammonium hydroxide (NH4OH) base catalysts was respectively designed to improve the dispersion and interfacial interaction between GO and epoxy resin. The structures and morphologies of GO, GO-SiO2(i) and GO-SiO2(ii) sheets were tested by FT-IR, XRD, XPS, TG, SEM and TEM. Epoxy composites containing GO, SiO2, GO-SiO2(i) and GO-SiO2(ii) with 0.1 wt% loadings were prepared and systemically investigated. It was indicated that the GO-SiO2/epoxy composites displayed higher tensile, flexural and impact strength and modulus than that of GO composites. For epoxy composites containing 0.1 wt% GO-SiO2(i) and GO-SiO2(ii), the flexural strength increased by 34.35% and 25.08% compared to that of GO composites, respectively. Furthermore, the reinforcing mechanisms have been also illuminated. This work is expected to offer a potential scale application of high-performance nanocomposites.

中文翻译:

在氧化石墨烯片上一步生成二氧化硅颗粒,以获得优异的环氧树脂复合材料机械性能和规模应用

摘要 分别设计使用二亚乙基三胺(DETA)和氢氧化铵(NH4OH)碱催化剂在氧化石墨烯(GO)表面一步生成纳米二氧化硅(SiO2),以改善GO与​​环氧树脂之间的分散和界面相互作用。通过FT-IR、XRD、XPS、TG、SEM和TEM测试了GO、GO-SiO2(i)和GO-SiO2(ii)片的结构和形貌。制备并系统研究了含有 GO、SiO2、GO-SiO2(i) 和 GO-SiO2(ii) 且负载量为 0.1% 的环氧复合材料。结果表明,GO-SiO2/环氧树脂复合材料比 GO 复合材料具有更高的拉伸、弯曲和冲击强度和模量。对于含有 0.1 wt% GO-SiO2(i) 和 GO-SiO2(ii) 的环氧复合材料,与 GO 复合材料相比,弯曲强度分别增加了 34.35% 和 25.08%。此外,强化机制也已阐明。这项工作有望提供高性能纳米复合材料的潜在规模应用。
更新日期:2020-12-01
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