Ft ir 6000 spectrometer

The structure analysis was examined by FT-IR 6000 spectrometer (JASCO, Japan from 400 to 4000 cm⁻¹ wavenumber) [12 (link)].

The ¹H NMR spectra were recorded at 500 MHz with a JEOL JNM-ECA 500 NMR spectrometer. The FGMAS NMR spectra were recorded at 400 MHz with a JEOL JNM-ECA 400 NMR spectrometer. The sample spinning rate was 8 kHz. In all NMR measurements, chemical shifts were referenced to the solvent values (δ = 2.49 ppm and 4.79 ppm for DMSO-d₆ and D₂O, respectively). The contact angles were measured by a Dynamic Contact Angle Analyzer (DCA-700, Kyowa Interface Science Ltd.). The IR spectra of the gels were measured using a JASCO FT/IR-410 spectrometer with a KBr disc, while those of the substrates were measured using a JASCO FT/IR-6000 spectrometer via the attenuated total reflection method (ATR). The mechanical properties of the gels were measured by a mechanical tension testing system (Rheoner, RE-33005, Yamaden Ltd.), while the dynamic viscoelasticity was measured using an Anton Paar MCR301 rheometer. X-ray photoelectron spectroscopy (XPS) data were collected with an AXIS 165 (KRATOS ANALYTICAL) using a monochromatic Al-Kα X-ray source.