Synthesis and characterization of poly(<i>N</i>‐vinyl imidazole) hydrogels crosslinked by gamma irradiation

Pekel, Nursel; Güven, Olgun

doi:10.1002/pi.1065

Cited by 62 publications

(62 citation statements)

References 32 publications

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“…Two factors could be effective in causing such a decrease: first, the formation of a gel might decrease with chain scission at high-dose applications in aqueous systems, and second, the probability of combining macroradicals decreases with increasing water content. 26 For further studies on PtBAEMA hydrogels, the composition with a tBAEMA/water volume ratio of 100/0 was selected as the optimum system because of its dimensional stability, geometry, gelation, and swelling properties. Thus, PtBAEMA hydrogels were prepared by the irradiation of solutions with the 100/0 composition at a dose of 100 kGy, which gave the maximum gelation of 85%.…”

Section: Resultsmentioning

confidence: 99%

“…This is particularly important for the charging of a polymer matrix with a drug solution or for biomedical and environmental applications. 26 Hydrogels can be synthesized appropriately to achieve the desired response to a given environmental condition. Parameters such as the polymer composition, degree of crosslinking density, and size and nature of the incorporated drug molecule play important roles in determining the drug release behavior and thus must be considered during the design of swellingcontrolled release devices.…”

Section: Swelling Studiesmentioning

confidence: 99%

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Synthesis and characterization of new methacrylate‐type hydrogels containing 2‐tert‐butylamino ethyl groups for sorption purposes

Bayramgil¹

2008

J of Applied Polymer Sci

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Crosslinked poly[2-(tert-butylamino)ethyl methacrylate] (PtBAEMA) hydrogels were synthesized by 60 Co-g-radiation-initiated simultaneous polymerization and crosslinking of 2-(tert-butylamino)ethyl methacrylate in bulk and in aqueous solutions. The results showed that the gelation percentage decreased with increasing water content. The structural and thermal characterizations of the hydrogels were accomplished with several techniques, including Fourier transform infrared spectroscopy, swelling measurements, thermogravimetry, and differential scanning calorimetry. The effects of time, pH, temperature, and ionic strength on the swelling behavior were also investigated. Swelling equilibrium was attained in 2-3 days. PtBAEMA hydrogels originally swelled to 350% (by volume) in deionized water, but this value reached 3000% around pH 2.0. PtBAEMA hydrogels were reversibly affected by the change in temperature within the temperature range of 4-708C. The swelling ratios of the gels decreased with increasing ionic strength. As a result, PtBAEMA hydrogels show stimuliresponsive properties depending on the characteristics of the environment, and they are being considered for adoption as some kind of carrying material for separation.

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Section: Resultsmentioning

confidence: 99%

Section: Swelling Studiesmentioning

confidence: 99%

Synthesis and characterization of new methacrylate‐type hydrogels containing 2‐tert‐butylamino ethyl groups for sorption purposes

Bayramgil¹

2008

J of Applied Polymer Sci

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“…The obtained IR spectra of PMPS and PVI are corresponding to the previous publications. [10][11][12][13][14][15][16][17][18] The IR spectrum of PMPS shows its characteristic vibrational features at 2841 (C-H stretching in OCH 3 ), 1729 (C=O stretching), 1460 (CH 2 bending), 1085 (Si-O-C asymmetric stretching), and 980 cm −1 (Si-O-Si bending).…”

Section: Resultsmentioning

confidence: 99%

“…The weight loss below 100 °C is mainly due to the loss of water. Then, the significant weight loss at 300- 400°C is attributed to the elimination of sulfonyl group in SDF-F 4 and the degradation of VI rings 17,18 and MPS.…”

Section: 1920mentioning

confidence: 99%

Phosphoric Acid-doped SDF-F/poly(VI-co-MPS)/PTFE Membrane for a High Temperature Proton Exchange Membrane Fuel Cell

Lee¹,

Yi²,

Kim³

2011

Bulletin of the Korean Chemical Society

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Sulfonated poly(fluorinated arylene ether)s (SDF-F)/poly[(N-vinylimidazole)-co-(3-methacryloxypropyl-trimethoxysilane)] (poly(VI-co-MPS))/poly(tetrafluoroethylene) (PTFE) is prepared for a high temperature proton exchange membrane fuel cell (PEMFC). The reaction of the membrane with phosphoric acid forms silicate phosphor, as a chemically bound proton carrier, in the membrane. Thus-formed silicate phosphor, nitrogen in the imidazole ring, and physically bound phosphoric acid act as proton carriers in the membrane. The physico-chemical and electrochemical properties of the membrane are investigated by various analytical tools. The phosphoric acid uptake and proton conductivity of the SDF-F/poly(VI-co-MPS)/PTFE membrane are higher than those of SDF-F/PVI/PTFE. The power densities of cells with SDF-F/poly(VI-co-MPS)/PTFE membranes at 0.6 V are 286, 302, and 320 mW cm −2 at 150, 170, and 190°C, respectively. Overall, the SDF-F/poly(VI-co-MPS)/PTFE membrane is one of the candidates for anhydrous HT-PEMFCs with enhanced mechanical strength and improved cell performance.

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“…Swollen gels were periodically removed from the swelling medium, lightly blotted to remove excess water from their surface, and then reweighed at room temperature. The following equation 12 was used to calculate the percentage of swelling:…”

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confidence: 99%

Synthesis of Poly(N-methylol Methacrylamide/Vinyl Sulfonic Acid) Hydrogels for Heavy Metal Ion Removal

Yakar¹

2014

Bulletin of the Korean Chemical Society

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In this study, poly(N-methylol methacrylamide) (NMMAAm) and poly(N-methylol methacrylamide/vinyl sulphonic acid) (NMMAAm-VSA) hydrogels were synthesized by 60 Co-γ ray irradiation at an ambient temperature. The graphs belonging to the gelation percent-percent-dose and swelling curves were drawn by using data which were obtained from water and different pH solutions. Characterization of hydrogels was performed by FTIR and DSC-TGA analysis. Heavy metal ion (Ni 2+ , Co 2+) removal capacities of hydrogels were investigated in aqueous solutions, which had different concentrations (100-1500 mg/L). In metal ion removal studies, pH value of aqueous medium was kept constant at 5.0. Maximum metal ion removal values were obtained for NMMAAm-VSA (1:3 mole ratio) hydrogels. Metal ion removal capacities of NMMAAm-VSA (1:3 mole ratio) hydrogels were found as 82 mg/g and 98 mg/g for Ni 2+ and Co 2+ ions, respectively.

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Synthesis and characterization of poly(N‐vinyl imidazole) hydrogels crosslinked by gamma irradiation

Cited by 62 publications

References 32 publications

Synthesis and characterization of new methacrylate‐type hydrogels containing 2‐tert‐butylamino ethyl groups for sorption purposes

Synthesis and characterization of new methacrylate‐type hydrogels containing 2‐tert‐butylamino ethyl groups for sorption purposes

Phosphoric Acid-doped SDF-F/poly(VI-co-MPS)/PTFE Membrane for a High Temperature Proton Exchange Membrane Fuel Cell

Synthesis of Poly(N-methylol Methacrylamide/Vinyl Sulfonic Acid) Hydrogels for Heavy Metal Ion Removal

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