ABSTRACT This paper proposes a novel strategy for enhancing the interfacial performance of carbon fiber reinforced polypropylene (CF/PP) composites by constructing CF‐MXene‐PP multilevel structures through electrophoretic deposition (EPD) under magnetic field assistance. By introducing a magnetic field during the EPD process, the directional alignment and orientation of nanoparticles in the electrophoretic solution are induced, forming a specific interfacial microstructure. The results demonstrate that the applied magnetic field guides the directional movement of charged MXene nanoparticles, significantly optimizing the distribution homogeneity of deposited MXene nanosheets on the CF surface and inducing the formation of highly‐ordered two‐dimensional lamellar structures. This not only enhances the surface roughness of CF but also strengthens van der Waals forces and π‐π interactions between MXene and CF, thereby improving the interfacial bonding strength of CF/PP composites. This strategy effectively suppresses nanoparticle agglomeration and ensures a uniform and continuous deposition layer. Experimental results show that compared with unmodified CF, the interlaminar shear strength (ILSS) of the modified CF/PP composites is increased from nearly 28 to 36 MPa, representing an improvement of 30% as well as the hardness of which improves by 15%. In addition, nanoindentation and other characterizations reveal that the elastic modulus and storage modulus of the modified composites are all significantly increased. This study opens up new avenues for the application of magnetic field‐assisted technologies in the field of composite materials.
Li et al. (Wed,) studied this question.
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