A new multi-component curing agent for epoxy resin with graphene oxide (GO) core and poly (amidoamine) (PAMAM) dendrimer-grafted silica nanoparticles was synthesized which is able to cause a considerable thermal stabilization of epoxy resins due to its dendritic amino-functionalization. Hyperbranched PAMAM-grafted silica nanoparticles (SD) were prepared and attached at the surface of GO to prepare the composite and curing agent (GSD). Then, epoxy resin was cured in the presence of different amounts of GSD and the final products were compared with ethylenediamine-cured epoxy resin (E) in their char contents. Successful functionalization of silica nanoparticles and attachment of SD at the surface of GO were evaluated by Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, X-ray diffraction, and thermogravimetric analysis (TGA). TGA results showed that total dendrimer content in SD and char residue of GSD are 14.4 wt % and 60.9%, respectively. Char residue and decomposition temperature are higher for composites. Covering of GO with SD was approved by scanning and transmission electron microscopies.

合成了一种新的多组分环氧树脂固化剂，该环氧树脂具有氧化石墨烯（GO）核和聚（酰胺基胺）（PAMAM）树枝状聚合物接枝的二氧化硅纳米粒子，由于其树枝状氨基-羟基-丙烯酰胺能够使环氧树脂具有相当大的热稳定性。功能化。制备了超支化的PAMAM接枝二氧化硅纳米颗粒（SD），并将其附着在GO的表面以制备复合材料和固化剂（GSD）。然后，在不同量的GSD存在下使环氧树脂固化，并将最终产品的乙二胺含量与乙二胺固化的环氧树脂（E）进行比较。通过傅立叶变换红外光谱，X射线光电子能谱，X射线衍射和热重分析（TGA）评估了二氧化硅纳米颗粒的成功功能化和SD在GO表面的附着。TGA结果表明，SD中的总树状大分子含量和GSD中的炭残渣含量分别为14.4重量％和60.9％。复合材料的炭渣和分解温度较高。通过扫描和透射电子显微镜检查证实了用SD覆盖GO。