Material integrity and fate of particulates released from carbon fibre composites containing nanomaterials during simultaneous fire and impact,Environmental Science: Nano

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Material integrity and fate of particulates released from carbon fibre composites containing nanomaterials during simultaneous fire and impact
Environmental Science: Nano ( IF 5.8 ) Pub Date : 2022-09-06 , DOI: 10.1039/d2en00222a
R. Chapple ₁ , L. Ferry ₂ , J.-M. Lopez-Cuesta ₂ , C. Chivas-Joly ₃ , E. L. Erskine ₄ , B. K. Kandola ₁

Affiliation

Nanomaterials are usually incorporated in the polymeric resin matrix of the carbon fibre-reinforced composites (CFC) to enhance their mechanical and thermal performances. CFCs when exposed to heat/fire and impact, such as in an aeroplane/transport vehicle crash, are known to release small carbon fibres, some of which could be of nanosized diameters and hence airborne. While this is still an under-researched area, there is no information available on the fate of CFCs containing nanomaterials in such scenarios. To address this, we have recently developed a methodology to subject CFCs to simultaneous heat/fire and impact and collect all of the released debris from the front/back faces plus the effluents of the heated/burning composite. CFCs containing nanomaterials, namely layered double hydroxides (LDH), nanotubes (NT) and graphene oxide (GO), were subjected to varying radiant heat fluxes and 19 J low velocity impact. The particle size distribution of released particles was measured by image analysis of SEM micrographs and their agglomeration behaviour by zeta potential measurement. The presence of nanomaterials did not significantly affect the particle size distribution of the released particles; however, the heat duration and the fire had a noticeable effect; the particle size decreased with increasing heat flux and duration. From the particle size distribution and agglomeration behaviours their potential health hazards could be contemplated.

中文翻译：

含纳米材料的碳纤维复合材料在同时起火和撞击过程中释放的颗粒的材料完整性和归宿

纳米材料通常掺入碳纤维增强复合材料 (CFC) 的聚合物树脂基体中，以增强其机械和热性能。已知 CFC 在暴露于热/火和冲击时（例如在飞机/运输车辆碰撞中）会释放小碳纤维，其中一些可能具有纳米级直径，因此会在空气中传播。虽然这仍然是一个研究不足的领域，但没有关于在这种情况下含有纳米材料的 CFC 的命运的信息。为了解决这个问题，我们最近开发了一种方法，使 CFC 同时受到热/火和冲击，并收集从正面/背面释放的所有碎片以及加热/燃烧复合材料的流出物。CFCs 含有纳米材料，即层状双氢氧化物 (LDH)、纳米管 (NT) 和氧化石墨烯 (GO)，受到不同的辐射热通量和 19 J 低速冲击。释放颗粒的粒度分布通过 SEM 显微照片的图像分析和通过 zeta 电位测量的聚集行为来测量。纳米材料的存在并没有显着影响释放颗粒的粒径分布；然而，受热持续时间和火灾有明显影响；粒径随着热通量和持续时间的增加而减小。从粒度分布和团聚行为可以考虑其潜在的健康危害。纳米材料的存在并没有显着影响释放颗粒的粒径分布；然而，受热持续时间和火灾有明显影响；粒径随着热通量和持续时间的增加而减小。从粒度分布和团聚行为可以考虑其潜在的健康危害。纳米材料的存在并没有显着影响释放颗粒的粒径分布；然而，受热持续时间和火灾有明显影响；粒径随着热通量和持续时间的增加而减小。从粒度分布和团聚行为可以考虑其潜在的健康危害。

更新日期：2022-09-06

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