Large-Scale Nanofiber Manufacturing| Thermally Conductive Ti,C,T, Fibers with SuperiorElectrical Conductivity

Prof. Gu Junwei's Team at Northwestern Polytechnical University in Nano-Micro Letters (IF 31.6): Thermally Conductive Ti3C2Tx Fibers with Excellent Electrical Conductivity

Challenge: High-performance Ti3C2Tx fibers have significant application potential in smart textiles, but their performance is limited by weak interlayer interactions.

Approach: Prof. Gu Junwei's team at Northwestern Polytechnical University proposed a universal strategy to design high-performance Ti3C2Tx fibers by forming strong interlayer crosslinks between borate and Ti3C2Tx nanosheets during wet spinning.

Innovation 1: By controlling Ti3C2Tx liquid crystal dispersion concentration and forming strong interlayer crosslinks between borate and Ti3C2Tx surface hydroxyl groups during wet spinning, continuous assembly of Ti3C2Tx fibers was achieved.

Innovation 2: The strong interlayer crosslinks reduce interlayer spacing and improve orientation and compactness, synergistically optimizing mechanical and electrical properties. With 0.75 wt% Na2B4O7, fibers showed optimal performance (tensile strength: 188.72 MPa, Young's modulus: 52.42 GPa, conductivity: 7781 S/cm).

Innovation 3: Borate promotes regular interfacial structure and reduces interfacial thermal resistance, endowing Ti3C2Tx fibers with high thermal conductivity. With 0.75 wt% Na2B4O7, optimal thermal conductivity reached 13 W/(m∙K).

DOI: https://doi.org/10.1007/s40820-025-01752-x