Abstract
Currently, poor mechanical properties limit the application of composite, especially the interlaminar shear strength (ILSS). Herein, this work employed a simple atomization deposition and co-blending method to introduce reinforcing phase on the interface and in the matrix, and then the unique multilayer-structured composites were fabricated by the technology of layer-by-layer assembly and hot-pressing. Benefiting from the presence of mechanical interlocking, hydrogen bonding, and van der Waals forces, the MXene on the interface and inside the matrix can both improve the ILSS of the composite. Specifically, when 0.5 wt% MXene nanosheets are deposited on the interface, the ILSS of the composite is increased by 21.41 %, and when 2 wt% MXene nanosheets are further introduced into the epoxy, the ILSS of the composite is improved by 55.58 %, reaching 59.96 MPa. Moreover, the ILSS of the composites shows good mechanical stability even after 30 days of storage. Besides, the failure modes of the composite were investigated, mainly including fiber debonding, matrix fracture and fiber breakage. This work adopts a facile and effective approach to prepare composites with excellent shear performance, which can provide more possibilities for the development of composites with high mechanical properties.
Published Version
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