高分散高长径比电纺聚酰亚胺超细短纤维及其在先进复合材料中的应用

碳纤维增强聚合物复合材料(CFRP)是最先进的复合材料之一，在航空航天领域、军事武器领域得到了广泛应用。然而，对碳纤维增强层间的聚合物基质层的增强增韧一直是困扰研究人员的棘手问题。有许多工作报道了通过碳纳米管或其类似纳米材料对聚合物基质层的增强增韧研究，但收效都不理想。本项目研究拟通过化学合成技术、静电纺丝技术、纤维制造技术和智能切短技术的结合，制备一种具有高度分散性、高长径比、高强度的电纺聚酰亚胺超细短纤维，研究这种具有高度分散性的超细短纤维对CFRP复合材料中聚合物基质层的增强增韧作用，以期开发一种能显著地提升CFRP复合材料机械性能的先进技术，并且，这样的先进技术有希望在先进复合材料制造工业中得到应用。

Carbon fiber reinforced polymer matrix composite (CFRP) is one of the most advanced composite materials, and has been widely used in the aerospace field and military weapons field. However, the reinforcing and toughening of the polymer matrix layer between the carbon fiber reinforced layers has been a thorny problem for researchers. There have been many reports on the reinforcing and toughening of polymer matrix layers by carbon nanotubes or similar nanomaterials, but the results are not satisfactory. This project intends to prepare a kind of electrospun polyimide ultrafine staple fibers with high dispersion, high aspect ratio and high tensile strength by combining chemical synthesis technology, electrospinning technology, fiber manufacturing technology and intelligent cutting technology, and to study the enhancing and toughening of such highly dispersed ultrafine short fibers on the polymer matrix layer of the CFRP composites. By the researching of this project, the researchers expect to develop an advanced technology that can significantly improve the mechanical properties of CFRP composites. And such advanced technology promises to be used in the advanced composites manufacturing industry.