Ftir spectrum gx

The ionic liquid [EMI][TFSI] was initially dried in vacuum for 24 h at a temperature of 70 °C. Next, P(VDF-HFP) and [EMI][TFSI] were co-dissolved in acetone with a weight ratio of 1:4:7. The ion gels were further dried in vacuum at 70 °C for 24 h to remove the residual solvent, after which it was cut with a razor blade, and then laminated onto the substrate of choice. To determine the nature of interaction between the ionic liquid and polymer matrix, FTIR spectroscopy was performed using FTIR spectrum GX, PerkinElmer. The plasticizing effect was investigated using DSC (DSC TA Instruments 2010) at a ramping rate of 10 °C min⁻¹. The samples were tightly sealed in aluminium pans, and the measurements were carried out while heating up the sample to 200 °C, followed by cooling down to –80 °C, at a heating and cooling rate of 10 °C min⁻¹. The degradation (working) temperature of the ion gel was measured by TGA (TGA-Q500). The self-healing nature of the ion gels was observed and captured under a polarizing optical microscope (Olympus, CX31-P).

Graphite nanoplatelets xGnP were purchased from XG Sciences Inc. (USA). The surface of xGnP was chemically activated with NaOH 0.1 M at 100 °C [49 (link)]. The oxidized nanoplatelets were obtained by using 65% HNO₃ from Fluka. Reagent water: ultrapure water (UPW) from Millipore Direct Q3 with resistivity >18.2 MΩ cm (25 °C). Ammonium chloride salt (NH₄Cl), concentrated HNO₃, 0.1 M picolinic acid stock standard anion solution and 1.000 mg L⁻¹ stock solution were purchased as certified solutions, or were prepared from ACS reagent grade from Merck. The 65% HNO₃ was bought from Fluka.
Sonic Vibracell ultrasonic processor, Sonics&Materials, Newtown CT, 06470 USA.
Ion chromatograph: 850 Professional IC (ion chromatography) AnCat-MCS using a Metrohm intelligent Partial Loop (MiPT) technique with conductivity detector; cation chromatographic column-Metrosep C4-150/4.0; cation guard column-Metrosep RP 2 Guard/3.5; Detector: 850 Professional conductivity detectors (0–15,000 µS/cm); professional drift <0.2 nS cm/h; Professional sample processor; and Metrohm patented Dosino technology, Metrohm, Herisau, Switzerland.
FTIR Spectrum GX, Perkin Elmer (Waltham, MA, USA) spectrometer.
(SEM) FEI QUANTA 200 (FEI Company, Hillsboro, OR, USA) scanning electron microscope.
Quantachrome NOVA 2200e (Boynton Beach, FL, USA) instrument.

The interaction between chitosan and nobiletin was investigated using Fourier-transform infrared spectroscopy (FTIR). Spectra were acquired using a Perkin–Elmer FTIR Spectrum GX instrument (Shelton, CT, USA), averaging 16 scans over a spectral range from 1700 to 1500 cm⁻¹. The analysis was conducted in a liquid medium.