Abstract The interfacial instability between fillers and polymer matrix has been of prime concern in preparing polymer composites of high performance, and large endeavors have been poured to solve the matter through functionalization of fillers. Considering the embedment of graphite nanoplatelet (GNP) to polymer for mechanically-robust composites of electro-conductivity, it would be essential to find out a method without employing oxidation-involved functionalization of GNP due to the structural degradation of GNP under harsh chemical oxidation reaction. Alternatively, based on the solvent-free mechanochemistry (MC)-involved GNP functionalization, we have proposed to complete an electro-conductive thermoplastic composite. It was notable that the MC-treated GNPs were extensively adhered on polyketone (PK) particles to form GNP-coated PK particles (G-PK) even without chemical functionalization, imparting successfully PK composite deploying controlled distribution of GNPs. As evidenced by the GNP distribution analyses through Raman mapping and X-ray tomography, the MC-treated GNPs were distributed with a tendency to form a continuous network-like structure in PK matrix, while the untreated GNP exhibited random distribution of severely agglomerated GNPs, a typical morphology of the incompatible filler-containing polymer composites. The MC-assisted formation of G-PK and the following network-formed distribution of GNPs endowed the effective transport of electron, resulting in notable electrical conductivity of G-PK composites, especially even at small loading of GNP. The MC-assisted G-PK and the corresponding PK composite exhibiting network-like distribution of GNPs are believed to be efficient as a sustainable structural material requiring controlled electrical conductivity.

中文翻译：

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机械化学处理辅助石墨纳米片可控嵌入导电聚酮复合材料的意义

摘要 填料与聚合物基体之间的界面不稳定性一直是制备高性能聚合物复合材料的主要问题，通过填料的功能化来解决这一问题已投入大量精力。考虑到石墨纳米片 (GNP) 嵌入到聚合物中以获得机械坚固的导电复合材料，由于 GNP 在剧烈的化学氧化反应下结构降解，因此必须找到一种不使用 GNP 氧化相关功能化的方法. 或者，基于无溶剂机械化学 (MC) 涉及的 GNP 功能化，我们建议完成导电热塑性复合材料。值得注意的是，即使没有化学官能化，MC 处理的 GNP 也广泛粘附在聚酮 (PK) 颗粒上，形成 GNP 包覆的 PK 颗粒 (G-PK)，从而成功地实现了 PK 复合材料，以控制 GNP 的分布。通过拉曼映射和 X 射线断层扫描的 GNP 分布分析证明，MC 处理的 GNP 分布有在 PK 矩阵中形成连续网络状结构的趋势，而未处理的 GNP 表现出严重聚集的 GNP 的随机分布，含不相容填料的聚合物复合材料的典型形态。MC 辅助 G-PK 的形成和随后 GNP 的网络形成分布赋予了电子的有效传输，导致 G-PK 复合材料具有显着的导电性，尤其是在 GNP 负载量较小的情况下。