Synthesis of Bifunctional Poly(Vinyl Phosphonic Acid-<i>co</i>-glycidyl Metacrylate-<i>co</i>-divinyl Benzene) Cation-Exchange Resin and Its Indium Adsorption

Abstract

Poly(vinyl phosphonic acid-co-glycidyl methacrylate-co-divinyl benzene) (PVGD) and PVGD containing an iminodiacetic acid group (IPVGD), which has indium ion selectivity, were synthesized by suspension polymerization, and their indium adsorption properties were investigated. The synthesized PVGD and IPVGD resins were characterized using Fourier transform infrared (FT-IR) spectroscopy, scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS) and mercury porosimetry. The cation-exchange capacity, the water uptake and the indium adsorption properties were investigated. The cation-exchange capacities of PVGD and IPVGD were 1.2 -4.5 meq/g and 2.5 -6.4 meq/g, respectively. The water uptakes were decreased with increasing contents of divinyl benzene (DVB). The water uptake values were 25% -40% and 20% -35%, respectively. The optimum adsorption of indium from a pure indium solution and an artificial indium tin oxide (ITO) solution by the PVGD and IPVGD ion-exchange resins were 2.3 and 3.5 meq/g, respectively. The indium adsorption capacities of IPVGD were higher than those of PVGD. The indium ion adsorption selectivity in the artificial ITO solution by PVGD and IPVGD was excellent, and other ions were adsorbed only slightly.

UV-Cured polypropylene mesh-reinforced composite polymer electrolyte membranes

“…In the spectrum of Figure 2C, the peak at 1144 cm -1 was due to -P = O vibrations and the absorption bands at 1025 and 970 cm -1 were ascribed to the P-OH stretching bands. Previously, it was reported that cation-exchange resin containing the VPA group shows a strong peak at about 1194 and 965 cm -1 (22). The absence of the peaks corresponding to the vinylic and acrylic groups at around 1635-1610 cm -1 indicates that membranes were successfully prepared with high conversions of PEGDA and VPA.…”

Nd:YVO4laser ablation of graphene films on glass and poly(ethylene terephthalate) substrates

“…[1][2][3] However, there are several issues on ITO, which includes high supply cost as a rare earth element, harmfulness to the environments, and lack of flexibility (not suitable to the most recent technology of flexible displays). [4][5][6] For these reasons, a new transparent conductive material with physical flexibility and high adhesiveness to various functional materials of advanced electron and optical devices, such as oxide/metal/oxide multilayers, [7][8][9][10][11] metal grid, 12) silver (Ag) nanowire, 13) poly(ethylene dioxythiophene)poly(styrene sulfonate) (PEDOT:PSS), 14) carbon nanotube (CNT), 15) and graphene, is highly necessitated. Among these materials, recently, graphene has been attractive owing to its extremely high carrier mobility, low sheet resistance, and high transmittance.…”