Freeze-dried hydrogels were prepared by means of CoolSafe Touch 100-9 (LaboGene, Aarhus, Denmark) and used for solid state analysis.
The morphology of the hydrogels was investigated using a Hitachi S-510 microscope (Hitachi Scientific Instruments Ltd., Tokyo, Japan) at 25 kV in low vacuum mode (Thermo Scientific Quattro ESEM) equipped with an EDX analyzer.
X-ray powder diffraction (XRPD) analysis was performed using a diffractometer (X’Pert Pro model, Malven Panalytical, Madrid, Spain). The diffractogram patterns were recorded using CuKα radiation, operating at 45 kV and 40 mA, in the range 4–60° 2θ.
Fourier transform infrared (FT-IR) analysis was carried out using a FTIR spectrophotometer (JASCO 6200, Pfungstadt, Germany) equipped with a Ge ATR. All analyses were performed from 400 to 4000 cm−1 with a resolution of 0.25 cm−1, and the spectra was processed with Spectra Manager v2 software.
Thermal analysis (thermogravimetric and differential scanning calorimetry analysis) was assessed using TGA/DSC1 equipment (Mettler-Toledo, Madrid, Spain) [15 (link)].
The morphology of the hydrogels was investigated using a Hitachi S-510 microscope (Hitachi Scientific Instruments Ltd., Tokyo, Japan) at 25 kV in low vacuum mode (Thermo Scientific Quattro ESEM) equipped with an EDX analyzer.
X-ray powder diffraction (XRPD) analysis was performed using a diffractometer (X’Pert Pro model, Malven Panalytical, Madrid, Spain). The diffractogram patterns were recorded using CuKα radiation, operating at 45 kV and 40 mA, in the range 4–60° 2θ.
Fourier transform infrared (FT-IR) analysis was carried out using a FTIR spectrophotometer (JASCO 6200, Pfungstadt, Germany) equipped with a Ge ATR. All analyses were performed from 400 to 4000 cm−1 with a resolution of 0.25 cm−1, and the spectra was processed with Spectra Manager v2 software.
Thermal analysis (thermogravimetric and differential scanning calorimetry analysis) was assessed using TGA/DSC1 equipment (Mettler-Toledo, Madrid, Spain) [15 (link)].
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