Design of thorn-like micro/nanofibers: fabrication and controlled morphology for engineered composite materials applications
Design of thorn-like micro/nanofibers: fabrication and controlled morphology for engineered composite materials applications
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DOI：
10.1039/c1jm12166a
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发表时间：
2011-10
影响因子：
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通讯作者：
F. Meng;R. Zhao;Yingqing Zhan;Xiaobo Liu
中科院分区：
文献类型：
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作者：
F. Meng;R. Zhao;Yingqing Zhan;Xiaobo Liu
在处理复合材料时要考虑的最重要的方面之一是填料-基体相互作用。在纳米纤维增强复合材料的情况下尤其如此。在这里，我们设计了一种新的3D架构：在静电纺丝表面上生长刺，旨在加强工程复合材料中的纤维基质粘合。采用静电纺丝和温度诱导自组装相结合的方法制备了由聚芳醚腈（PEN）“茎”和酞菁铁（FePc）“刺”组成的新型刺状纤维。特别是，通过后温处理可以在PEN纳米纤维上生长FePc刺状结构，并且刺的长度可以分别通过处理时间和温度进行精细控制。更重要的是，这种刺状纤维嵌入环氧树脂后，可以将分子捆绑在一起，与周围的环氧树脂形成连锁。与未处理的纤维增强环氧树脂相比，这些刺状纤维增强的复合材料的弯曲性能进一步提高。因此，这种功能性纤维可用作聚合物树脂的有效复合增强体。
One of the most important aspects to take into account when dealing with composite materials is the filler–matrix interaction. This is particularly true in the case of nanofiber-reinforced composites. Here, we designed a new 3D architecture: growing thorns on an electrospun nanofiber surface, aiming to strengthen the fiber–matrix adhesion in engineered composite materials. The novel thorn-like fiber, composed of polyarylene ether nitriles (PEN) “stems” and iron phthalocyanine (FePc) “thorns”, was prepared by combining electrospinning and temperature-induced self-assembly. Especially, the FePc thorn-like structures could be grown on PEN nanofibers by a post-temperature treatment, and the lengths of the thorns could be finely controlled by the processing time and temperature, respectively. More importantly, after the thorn-like fibers were embedded into an epoxy resin, the thorns could tie molecules and interlock with the surrounding epoxy resin. The flexural properties of composites reinforced with these thorn-like fibers were further increased in comparison with that of neat and untreated fiber-reinforced epoxy resin, respectively. Thus, this functional fiber can be used as an effective composite reinforcement to polymer resins.