Tga dtg 60h

Powder X-ray diffraction (PXRD) measurements were carried out on a Shimadzu 6100 using Cu-Kα (λ = 0.15406 Å) radiation at 298 K on solid powder samples of freshly prepared and recovered materials of NiFe₂O₄@SiO₂–PEI. The PXRD of NiFe₂O₄ was recorded on an STOE-STADI MP diffractometer equipped with a Cu-Kα₁ radiation (λ = 0.15406 Å) source and operating in transmission mode. Thermogravimetry–differential thermal analysis (TGA-DTA) was recorded on a Shimadzu TGA-DTG-60H instrument on a powder sample. Fourier-transformed (FT)-IR spectra were recorded on a Bruker Alpha I spectrophotometer on KBr disks. Field emission scanning electron microscopy (FE-SEM) and energy-dispersive X-ray spectroscopy (EDX) were carried out on a JEOL JSM-IT 100 instrument.

The salts, chemicals, and solvents used for this project were purchased from a commercial seller of Merck Chemicals (Merck Company, Darmstadt, Germany). The Bis-GMA, TEGDMA, CQ, and 3-NDADM were purchased from a commercial seller of Aldrich chemicals (Sigma-Aldrich, St. Louis, MO, USA). The thermal behavior was investigated to confirm the thermal stability of the samples using TGA analysis on a Shimadzu TGA-DTG-60H instrument (Kagoshima, Japan). The FT-IR analysis was performed on a Bruker spectrophotometer (BRUKER TEMSOR27, Borken, Germany) using the KBr disk in the range of 400 to 4000 cm⁻¹. The morphology and chemical composition of the samples were studied by FE-SEM and EDX analysis using a JEOL JSM-IT 100 (Tokyo, Japan) instrument. The mechanical properties were measured on a universal testing machine (Hounsfield, Redhill, UK). The XRD patterns of the Zn₂SiO₄ and SiO₂–ZnO samples were analyzed on a Bruker XRD D8/Advance/axs instrument (Bruker AXS GmbH, Karlsruhe, Germany).

The thermogravimetric analysis (TGA) and its derivative (DTG) of the as-obtained CNCs and cellulose precursors were studied TGA/DTG-60H (SHIMADZU Corporation, Japan). The samples were heated from room temperature to 700°C at a heating rate of 10°C/min under a nitrogen gas flow rate of 60 mL/min.