Characterization of glycidyl methacrylate based magnetic nanocomposites

Abstract

Magnetic and non-magnetic macroporous crosslinked copolymers of glycidyl methacrylate and trimethylolpropane trimethacrylate were prepared by suspension copolymerization and functionalized with diethylenetriamine. The samples were characterized by mercury porosimetry, scanning electron microscopy with energy-dispersive X-ray spectroscopy (SEM-EDS), Fourier transform infrared spectroscopy analysis (FTIR-ATR), thermogravimetric analysis (TGA), X-ray diffractometry (XRD), atomic force microscopy (AFM), transmission electron microscopy (TEM) and SQUID magnetometry. The FTIR-ATR analysis of synthesized magnetic nanocomposites confirmed the presence of magnetite and successful aminofunctionalization. Non-functionalized and amino-functionalized nanocomposites exhibited superparamagnetic behavior at 300 K, with a saturation magnetization of 5.0 emu/g and 2.9 emu/g, respectively. TEM analysis of the magnetic nanocomposite has shown that magnetic nanoparticles were homogeneously dispersed in the polymer matrix. It was demonstrated that incorporation of magnetic nanoparticles enhanced the thermal stability of the magnetic nanocomposite in comparison to the initial non-magnetic macroporous copolymer.

Novel magnetic polymer/bentonite composite: Characterization and application for Re(VII) and W(VI) adsorption

“…3c) with a peak at 3400 cm -1 corresponds to the overlapping of -OH and N−H stretching vibrations. The band at 1570 cm -1 and shoulder at ~1660 cm -1 could be ascribed to the bending of N-H and NH 2 vibrations [19]. The above results confirm the successful aminofunctionalization of MB-PGME copolymer.…”

“…The thermal decomposition of MB-PGME involves two degradation steps. The first step in the range of 200-350 o C could be associated with the decomposition of the random chain end, while the second step between 350 and 450 o C represents the total degradation of MB-PGME by random chain scission [19]. The TGA residue of approximately 3 wt.% observed for MB-PGME correlates well with MB content of 2.4 wt.% calculated from magnetization measurements.…”

Speciation of Hexavalent Chromium in Aqueous Solutions Using a Magnetic Silica-Coated Amino-Modified Glycidyl Methacrylate Polymer Nanocomposite

“…The strong peak originating from Fe-O vibrations at ~570 cm −1 confirms the successful incorporation of magnetite nanoparticles [ 35 ]. The characteristic bands for crosslinked methacrylate copolymer at ~2939 cm −1 , ~1456 cm −1 , and ~1389 cm −1 (methyl and methylene stretching and bending vibrations of C-H bond), 1723 cm −1 (C=O stretching vibrations), 1261 cm −1 , and 1153 cm −1 (stretching C-O-C vibrations) also appeared in Fe 3 O 4 @APTMS/PGME-deta spectra [ 36 , 37 ]. The absorption bands for the epoxy ring vibrations at ~850 cm −1 and ~1260 cm −1 indicate incomplete functionalization of epoxy groups.…”

Recovery of Vanadium (V) Oxyanions by a Magnetic Macroporous Copolymer Nanocomposite Sorbent

“…The tested sorbent m-Si-poly(GME)-deta was synthesized as described in previous works [13]. Pore size distributions were determined by a high-pressure mercury intrusion porosimeter Carlo Erba Porosimeter 2000 (Washington, DC, USA, software Milestone 200).…”