D max 2200 pc xrd system

The microstructures of both the MXene/RSF solution and MXene/RSF hydrogels were observed using SEM, cryo-SEM, and elemental mapping (Hitachi S4800, Japan). TEM images were also acquired using a JEM-2010F microscope. XRD analysis was performed using a Rigaku D/MAX-2200 PC XRD system. FT-IR spectra were acquired using a Nicolet FT-IR 6700 spectrometer. Raman scattering was recorded using a Horiba Jobin-Yvon Lab Ram HR VIS high-resolution confocal Raman microscope with an excitation laser at 785 nm. The mechanical performance of the prepared hydrogels was tested using an Instron 3367 mechanical testing instrument. The stress–strain curves and moduli of the hydrogels were also recorded accordingly. The resistance of the hydrogels with a gradient of MXene content (0, 2, 4, and 8 mg/mL) was assessed adopting a digital multimeter (Keithley DMM-6500) with a 2-wire mode and a resolution of 100 ms. Rheological experiments (37 ± 1 °C) were conducted adopting a HAAKE MARS3 thermometer (Thermo Fisher, Massachusetts, USA) with a cone-and-plate geometry of 1° incline and 60 mm diameter.