Cavitation-Free Shear Emulsification Breaks the Yield–Damage Trade-Off in MXene Delamination

Abstract

The production of high-quality monolayer MXene nanosheets is constrained by the trade-off between delamination efficiency and structural damage. Here, we report a cavitation-free, high-speed shear emulsification strategy for the rapid, low-damage delamination of multilayer Ti3C2Tx MXene. Continuous fluid shear promotes interlayer sliding and separation, enabling an 82% monolayer yield within 10 min while retaining an average lateral size of approximately 5 μm and a film conductivity of 10,800 S cm–1, outperforming conventional ultrasonic delamination. Structural and spectroscopic analyses show that crystallinity and surface terminations are retained, enabling assembly into dense lamellar films. These films exhibit electromagnetic interference (EMI) shielding effectiveness above 60 dB and an infrared emissivity of 0.11. Furthermore, the process is readily scalable to hundred-gram-level delamination, highlighting its potential for the large-scale production of high-quality MXene for multifunctional applications.