2D graphene and its derivatives are used as potent high strength filler materials contributing in the enhanced mechanical properties of resulting polymer composites. However, the full potential of these filler reinforcement materials has not been explored yet due to the weak interface interactions between the filler and polymer matrix. Various functionalities can be introduced during the synthesis of graphene to improve interface interactions but strong covalent bonding between the filler and matrix is still a nascent area. Present report proposes a new route to covalently attach 2D graphene oxide (GO) sheets with poly allylamine (PAA) resulting in a multifold improvement in the mechanical performance of PAA. A theoretical study in this work has been performed to identify possible functionalities on GO sheet and bonding with PAA. The study has proposed a possible route of covalent amide bond linkage of –COOH groups (at GO edges) with free -NH₂ (groups on PAA polymer). The molecular dynamics model has shown enhancement in mechanical properties of the resulting composite. Next in the experimental synthesis, GO has been covalently attached to PAA through covalent amide bonding between of –COOH group (on GO) with –NH₂ group (on PAA) using 1-ethyl-3-(3-dimethyl aminopropyl) carbodiimide hydrochloride (EDC)/ N-Hydroxysuccinimide (NHS) chemistry. The chemical bonds in the synthesized samples were characterized using FTIR and UV-vis spectroscopy. Mechanical properties of the composite samples have been studied using nanoindentation technique. The proposed scheme has great potential of enhancing the mechanical performance of other polymers through covalent cross-linking.

2D石墨烯及其衍生物用作有效的高强度填料，有助于增强所得聚合物复合材料的机械性能。但是，由于填料和聚合物基体之间的界面相互作用较弱，因此尚未探索这些填料增强材料的全部潜力。可以在合成石墨烯的过程中引入各种功能，以改善界面相互作用，但填料和基体之间的强共价键仍然是新生领域。本报告提出了一种新方法，将2D氧化石墨烯（GO）片材与聚烯丙胺（PAA）共价连接，从而使PAA的机械性能得到了多重改善。在这项工作中进行了理论研究，以确定GO薄板上可能的功能以及与PAA的粘合。₂（在PAA聚合物上的基团）。分子动力学模型显示出所得复合材料的机械性能增强。接下来的实验合成中，使用1-乙基-3-（3-二甲基氨基丙基）碳二亚胺盐酸盐通过–COOH基团（GO上）与–NH ₂基团（PAA上）之间的共价酰胺键将GO共价连接到PAA上。（EDC）/ N-羟基琥珀酰亚胺（NHS）化学物质。合成样品中的化学键通过FTIR和UV-vis光谱进行表征。已经使用纳米压痕技术研究了复合样品的机械性能。所提出的方案具有通过共价交联增强其他聚合物的机械性能的巨大潜力。