Abstract To achieve an enhanced local controllable laser patterning for polymers, the composite powder of graphene/polystyrene was successfully designed and prepared. The design idea of this composite was inspired by the π-π stacking (interaction) between aromatic rings of polystyrene (PS) and basal planes of graphene. Compared with pure graphene, the results showed that only 0.0038 wt% (38 ppm) of the graphene/PS composite powder endowed polymers with an enhanced laser patterning performance. The results of SEM revealed that many spherical PS particles (340–370 nm) were tightly adsorbed to the surface of graphene via π-π stacking, serving as the isolating substance to successfully prevent the graphene re-agglomeration. Both XPS and micro-Raman spectroscopy observed that, after irradiation of 1064 nm near infrared (NIR) pulsed laser, the carbonization degree of polymer using the composite powder of graphene/PS was much higher than that of only using pure graphene. This far higher degree of carbonization was contributed from the dual role of the local carbonization of PS particles in the composite and the good dispersity of the composite powder, resulting in a much better contrast to the patterns. Importantly, after using this new composite powder, the defect in patterns caused by graphene agglomeration also no longer existed.

中文翻译：

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石墨烯/聚苯乙烯复合材料诱导聚合物的增强局部可控激光图案化

摘要 为实现聚合物的增强局部可控激光图案化，成功设计并制备了石墨烯/聚苯乙烯复合粉末。这种复合材料的设计理念受到聚苯乙烯 (PS) 的芳环和石墨烯基面之间的 π-π 堆积（相互作用）的启发。与纯石墨烯相比，结果表明，只有 0.0038 wt% (38 ppm) 的石墨烯/PS 复合粉末赋予聚合物增强的激光图案化性能。SEM 结果表明，许多球形 PS 颗粒（340-370 nm）通过 π-π 堆积紧密吸附在石墨烯表面，作为隔离物质成功阻止了石墨烯的再团聚。XPS 和微拉曼光谱均观察到，在 1064 nm 近红外 (NIR) 脉冲激光照射后，使用石墨烯/PS复合粉末的聚合物碳化度远高于仅使用纯石墨烯的碳化度。这种高得多的碳化程度是由于复合材料中 PS 颗粒的局部碳化和复合粉末的良好分散性的双重作用，从而与图案形成了更好的对比度。重要的是，使用这种新型复合粉末后，石墨烯团聚导致的图案缺陷也不再存在。