Surface modification was needed in the application of nanoparticles. In this work, a simple method was proposed to prepare polymer coatings on reduced graphene oxide (rGO) sheets. A polymer coating of plasma polymethyl methacrylate (pPMMA) was synthesized on the surface of rGO by plasma polymerization using dielectric barrier discharge plasma equipment. There was good adhesion between the pPMMA coating and the surface of rGO. Furthermore, the pPMMA coating consisted of two layers classified by their interactions with rGO:pPMMA in the outer layer physically adhered to the surface and pPMMA of the under layer interacted with rGO by chemical bonding. The thicknesses of the outer and under layers were 1.5–3 nm and 2–3.5 nm, respectively. Moreover, the morphology and thickness of pPMMA coatings could be effectively regulated by controlling the input voltage and processing time. The process of the deposition of pPMMA coating was preliminarily studied and discussed in this work. We believed that this strategy could open up an avenue for the surface modification of other kinds of nanoparticles.

在纳米颗粒的应用中需要表面改性。在这项工作中，提出了一种简单的方法来在还原的氧化石墨烯（rGO）板上制备聚合物涂层。使用介电势垒放电等离子设备通过等离子聚合在rGO的表面上合成了等离子聚甲基丙烯酸甲酯（pPMMA）的聚合物涂层。pPMMA涂层与rGO表面之间具有良好的附着力。此外，pPMMA涂层由两层组成，这两层按其与rGO的相互作用进行分类：外层中的pPMMA物理粘附到表面，底层的pPMMA通过化学键合与rGO相互作用。外层和底层的厚度分别为1.5–3 nm和2–3.5 nm。此外，通过控制输入电压和处理时间可以有效地调节pPMMA涂层的形貌和厚度。这项工作对pPMMA涂层的沉积过程进行了初步研究和讨论。我们认为，该策略可以为其他种类的纳米粒子的表面改性开辟一条途径。