Carbon-fibre reinforced composites are seeing increased deployment, especially in the aerospace industry, and the next-generation of these materials will need to meet demanding performance requirements beyond just specific strength. The incorporation of nanomaterials such as graphene into composites has great potential for enhancing electrical, thermal, and mechanical properties, which could then enable new capabilities such as built-in lightning strike protection and electromagnetic shielding. One major challenge is successful integration of nanomaterials into the composite during the manufacturing process especially for thermoplastic based composites. This work explores the spray deposition of exfoliated graphene in liquid suspensions for the nano-enhancement of electrical properties in carbon-fibre reinforced polyether ether keytone (PEEK) composites. Developed thin films were smooth with RMS roughness of 1.06 μm on Si substrates and RMS roughness of 1.27 μm on CF-PEEK tapes. The addition of 1.3 wt% graphene into the interlayers of CF-PEEK composites resulted in bulk electrical conductivity enhancement both in plane and through thickness of ~ 1100% and 67.5% respectively. This approach allows for pre-consolidation introduction of high-performance nanomaterials directly to thermoplastic prepregs which could open simple pathways for the in-situ manufacturing of carbon-fibre reinforced polymer nanocomposites.

中文翻译：

---

石墨烯薄膜中间层，用于增强碳纤维/ PEEK复合材料的导电性

碳纤维增强复合材料正得到越来越多的应用，尤其是在航空航天工业中，下一代这些材料将需要满足特定强度以外的苛刻性能要求。将纳米材料（例如石墨烯）掺入复合材料具有增强电，热和机械性能的巨大潜力，然后可以启用新功能，例如内置的雷击防护和电磁屏蔽。一个主要挑战是在制造过程中将纳米材料成功地集成到复合材料中，特别是对于热塑性基复合材料而言。这项工作探索了剥落的石墨烯在液体悬浮液中的喷雾沉积，以纳米增强碳纤维增强的聚醚醚键（PEEK）复合材料的电性能。所开发的薄膜是光滑的，在Si基板上的RMS粗糙度为1.06μm，在CF-PEEK胶带上的RMS粗糙度为1.27μm。将1.3 wt％的石墨烯添加到CF-PEEK复合材料的中间层中，可使平面和厚度方向的整体电导率分别提高1100％和67.5％。这种方法允许将高性能纳米材料直接预固结引入热塑性预浸料中，这可以为碳纤维增强的聚合物纳米复合材料的原位制造开辟简单的途径。Si基板上为06μm，CF-PEEK胶带上的RMS粗糙度为1.27μm。将1.3 wt％的石墨烯添加到CF-PEEK复合材料的中间层中，可使平面和厚度方向的整体电导率分别提高1100％和67.5％。这种方法允许将高性能纳米材料直接预固结引入热塑性预浸料中，这可以为碳纤维增强的聚合物纳米复合材料的原位制造开辟简单的途径。Si基板上为06μm，CF-PEEK胶带上的RMS粗糙度为1.27μm。将1.3 wt％的石墨烯添加到CF-PEEK复合材料的中间层中，可使平面和厚度方向的整体电导率分别提高1100％和67.5％。这种方法允许将高性能纳米材料直接预固结引入热塑性预浸料中，这可以为碳纤维增强的聚合物纳米复合材料的原位制造开辟简单的途径。