Radiation synthesis of poly(N‐vinylpyrrolidone‐co‐methacrylic acid) hydrogels and their usability in uranyl ion adsorption

Abstract

In this study, N-vinylpyrrolidone(VP)/ methacrylic acid (MAA) mixtures have been prepared at three different mole percents which the methacrylic acid composition around 5, 10, and 15%. Poly(N-vinylpyrrolidone-co-methacrylicacid) P(VP/MAA) hydrogels irradiated at 3.4 kGy have been used for swelling and diffusion studies in water and uranyl ion solutions. The influence of dose, pH, relative amounts of monomers in MAA/VP monomer mixtures on the swelling properties have been investigated. P(VP/MAA) hydrogels were swollen in distilled water at pH 7.0. P(VP/MAA)1 hydrogel containing 36% (mole percent) methacrylic acid showed the maximum percent swelling in water. Adsorption isotherms were constructed for uranyl ions and P(VP/MAA) hydrogel systems. It has been found that P(VP/MAA) hydrogels have very high uptake of the uranyl ions succesfully in water containing uranyl ions.

Environmentally Sensitive Vinylpyrrolidone/methacrylic Acid Inter-complex Amphoteric Hydrogel: Preparation, Characterization, and Use in the Binding of Copper Ions

“…These publication numbers show that the research and development of VP hydrogels are still in their infancy compared to the continued and significantly increased efforts to develop hydrogels [12]. However, although methacrylic acid is mentioned in about 30 of these publications (such as crosslinking with gamma rays [13][14][15][16][17][18], photopolymerization [19], polymerization by ATR method [9], grafting polymerization [20], and IPN formation [21]), there are no studies on the preparation of copolymeric hydrogels by free radical polymerization using azobisisobutyronitrile (AIBN) initiator.…”