MoS 2 ‐Modified Jute Fibers: Synergistic Enhancement of Tribological Properties in Brake Material via Interface Compatibility Optimization and Surface Modification

ABSTRACT Asbestos and copper fibers are increasingly restricted in brake materials due to health and environmental hazards. Jute fibers (JF) are promising sustainable alternatives, yet their poor interfacial compatibility with polymer matrices limits mechanical and tribological performance. Herein, MoS 2 nanosheets were grown in situ on JF via a facile hydrothermal method to fabricate dual‐functional JF/MoS 2 hybrid reinforcements for polymer‐based brake materials. The 4 wt.% JF/MoS 2 hybrid increased the hardness by 99%, the compressive strength and modulus by 40% and 14%, and the impact strength by 21%, and reduced the wear rate by 36% while delivering a more stable friction coefficient than the unfilled control. Compared with the physically mixed JF and MoS 2 , the hybrid improved the compressive strength and modulus by 70% and 47% and reduced the wear rate by 30%. The grafted MoS 2 strengthens interfacial adhesion through mechanical anchoring and, upon sliding, forms a low‐shear, high‐load‐bearing transfer film that mitigates abrasive and adhesive wear. These results are based on laboratory‐scale dry sliding tests and should not be interpreted as direct evidence of full‐scale braking performance. This strategy addresses interfacial adhesion and lubricant dispersion, offering a new paradigm for sustainable, high‐performance, asbestos‐free friction materials.