Application Cases

Experiment Title: Preparation of MXene/TiO₂ Composite Nanofiber Membranes

Testing Equipment: Signal Generator, High Voltage Amplifier, Oscilloscope, Spinning Nozzle, Receiving Drum, Solution Syringe Pump, etc.

Experiment Process:

Figure 1-1: Schematic Diagram of the Preparation Experiment of MXene/TiO₂ Composite Nanofiber Membranes

The preparation of oxide nanofibers by electrospinning is similar to the process of electrospinning polymer compounds. The signal generator produces an excitation signal, which is amplified by the ATA-67100 high voltage amplifier to apply a high voltage electric field between the spinning nozzle and the collector. When the electrostatic force exceeds the surface tension of the spinning solution, a liquid jet is formed at the nozzle. The charged jet is stretched and whipped, and further splits into multiple jets in the unstable region. As the spinning solution moves to the collector, the solvent evaporates, and the fiber diameter decreases. Finally, ultrafine fibers are obtained and wound onto a rotating drum or a flat collector. Meanwhile, the output voltage is observed using an oscilloscope to control the electric field strength.

Experimental Results:

Figure 2-1: Physical Image of MXene/TiO₂ Nanofiber Membrane During Electrospinning Process

Initially, we prepared various concentrations of Ti₃C₂TₓMXene ethanol solutions during the preparation of Ti₃C₂TₓMXene to investigate the influence of different concentrations of Ti₃C₂TₓMXene ethanol solutions on the appearance of electrospun nanofiber membranes, and further to explore the effect of Ti₃C₂TₓMXene content on the properties of electrospun nanofiber membranes. As shown in Figure 2-1, the left image (a) is the electrospun nanofiber membrane prepared from a 4 g/L Ti₃C₂TₓMXene ethanol solution with 6.6 g added, and the right image (b) is the electrospun nanofiber membrane prepared from a 5 g/L Ti₃C₂TₓMXene ethanol solution with 6.6 g added. It is evident that the electrospun nanofiber membrane prepared from the 5 g/L Ti₃C₂TₓMXene ethanol solution is difficult to form a film and has severe fiber breakage. In contrast, the electrospun nanofiber membrane prepared from the 4 g/L Ti₃C₂TₓMXene ethanol solution has a very smooth surface, indicating that at a concentration of 4 g/L, Ti₃C₂TₓMXene nanoparticles are well embedded in the nanofibers and can form a complete and smooth fiber membrane structure. When the concentration of Ti₃C₂TₓMXene ethanol solution exceeds 4 g/L, the prepared gel fibers are difficult to form a fiber membrane. Excessive Ti₃C₂TₓMXene content leads to discontinuous jetting during the spinning process, resulting in numerous breaks. Ti₃C₂TₓMXene also aggregates and falls off during the spinning process, greatly limiting the application performance.

High Voltage Amplifier Recommendation: ATA-7100

Figure: Specifications of the ATA-7100 High Voltage Amplifier

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