Engineering the electrospinning of MWCNTs/epoxy nanofiber scaffolds to enhance physical and mechanical properties of CFRPs
Engineering the electrospinning of MWCNTs/epoxy nanofiber scaffolds to enhance physical and mechanical properties of CFRPs
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DOI：
10.1016/j.compscitech.2021.108941
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发表时间：
2021-07-10
影响因子：
9.1
通讯作者：
Dalir, Hamid
中科院分区：
文献类型：
--
作者：
Wable, Vidya;Biswas, Pias Kumar;Dalir, Hamid
提出了一种提高碳纤维增强聚合物（CFRP）预浸料复合材料物理力学性能的经济有效的方法，即在传统CFRP预浸料复合材料的层间引入静电纺多壁碳纳米管（MWCNTs）/环氧树脂纳米纤维。采用优化的静电纺丝工艺成功制备了多壁碳纳米管取向的环氧树脂纳米纤维。纳米纤维直接沉积在预浸料层上，以实现改善的粘附力和界面结合，从而增加强度并改善其他机械性能。因此，层间剪切强度（ILSS）和疲劳性能在高应力制度分别增加了29%和27%。几乎不可见的冲击伤害（BVID）能量显著增加高达45%。由于CFRP层之间存在高导电性的MWCNT网络，导热性和导电性也显著增强。所提出的方法是能够均匀地沉积高含量的多壁碳纳米管在层间层界面的碳纤维增强材料，以加强/提高CFRP的性能，这是以前没有被证明是可能的，由于高树脂粘度所造成的随机取向的多壁碳纳米管在环氧树脂体系。
A cost-effective approach to improve the physical and mechanical properties of carbon fiber reinforced polymer (CFRP) prepreg composites, where electrospun multiwalled carbon nanotubes (MWCNTs)/epoxy nanofibers were synthesized and incorporated in between the layers of conventional CFRP prepreg composite has been presented. MWCNT-aligned epoxy nanofibers were successfully produced by an optimized electrospinning process. Nanofibers were deposited directly onto prepreg layers to achieve improved adhesion and interfacial bonding, leading to added strength and improvements in other mechanical properties. Thus, interlaminar shear strength (ILSS) and fatigue performance at high-stress regimes increased by 29% and 27%, respectively. Barely visible impact damage (BVID) energy increased significantly by up to 45%. The thermal and electrical conductivities were also enhanced significantly due to the presence of the highly conductive MWCNT networks between the CFRP layers. The presented method was capable of uniformly depositing high contents of MWCNTs at interlaminar ply interface of prepregs to strengthen/enhance CFRP properties, which has not been previously shown to be possible due to high resin viscosity caused by randomly oriented MWCNTs in epoxy system.