Synthesis of Acrylic Superabsorbents

Dayal, Umendra; Mehta, Sanjay; Choudhary, Manjeet S.; Jain, R. C.

doi:10.1081/mc-100101426

Cited by 33 publications

(11 citation statements)

References 21 publications

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“…Aqueous phase in situ polymerization of acrylic acid (green chemistry) was adapted from literature (27,28). The polymerization solution contained 30 wt% acrylic acid (monomer), ethylene glycol (cross-linker, added in a 1:10 molar ratio of EG to acrylic acid), and 1 wt% potassium persulfate (initiator).…”

Section: Methodsmentioning

confidence: 99%

Iron-Functionalized Membranes for Nanoparticle Synthesis and Reactions

Lewis

Smuleac

Montague

et al. 2009

Separation Science and Technology

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Membrane-based separation processes have been used extensively for drinking water purification, wastewater treatment, and numerous other applications. More recent developments in membrane functionalization have made the use of membrane science important in diverse fields, from tunable separations to catalysis. The focus of this work is to create a common membrane platform for the incorporation of technologies capable of degrading target pollutants. Functionalized membranes capable of metal capture were created using water-based and solvent-based acrylic acid polymerization to synthesize poly (acrylic acid) (PAA) within poly(vinylidene fluoride) (PVDF) membrane pores. The COO − groups of PAA were used to capture Fe(II), which was then either reduced and doped with Pd to form Fe/Pd nanoparticles or used as-is for free radical generation with hydrogen peroxide. Fe/Pd nanoparticles were synthesized within the pores of a PAA/PVDF membrane functionalized via aqueous (green) chemistry and used to dechlorinate trichloroethylene (TCE) and 2,2′-dichlorobiphenyl (DiCB). A PAA/PVDF membrane containing immobilized Fe(III) was used to obtain controlled free radical generation and target organic (pentachlorophenol) degradation within the membrane pore under convective flow conditions.

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Section: Methodsmentioning

confidence: 99%

Iron-Functionalized Membranes for Nanoparticle Synthesis and Reactions

Lewis

Smuleac

Montague

et al. 2009

Separation Science and Technology

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“…For this reason they have been used widely in the field of drug delivery, immobilization of enzymes, dewatering of protein solutions, solute separation, baby diapers, soil for agriculture and horticulture, water-blocking tapes, absorbent pads, and numerous other applications [2][3][4][5][6][7][8]. High swelling rate is an important property of hydrogels.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of porous poly(acrylamide) hydrogels using calcium carbonate and its application for slow release of potassium nitrate

Mahdavinia¹,

Mousavi²,

Karimi³

et al. 2009

Express Polym. Lett.

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Abstract. Porous poly(acrylamide) was synthesized using calcium carbonate microparticles and subsequent acid treatment to remove the calcium carbonate. Methylenebisacrylamide and ammonium persulfate/sodium metabisulfite were used as crosslinking agent and redox initiator, respectively. The porous structure of resulted hydrogels was confirmed using SEM micrographs. The effect of methylenebisacrylamide concentration and calcium carbonate amount on the swelling of the hydrogels was investigated. The results showed that the effect of methylenebisacrylamide and calcium carbonate variables on the swelling is reverse. The hydrogels were subsequently utilized for the loading of potassium nitrate. Potassium nitrate as active agent was loaded into hydrogels and subsequently the release of this active agent was investigated. In these series of investigation, the effect of content of loading, methylenebisacrylamide and calcium carbonate amount on the release of potassium nitrate from hydrogels was investigated.

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“…The gel was kept in the bag to drain for 1 h, and then the swollen gel was weighed. The absorbency was calculated by using Equation (1).…”

Section: Preparation Of Pamamentioning

confidence: 99%

“…[1][2][3][4] Most of them are weakly cross-linked poly(acrylic acid) (PAA). [5][6][7][8] However, their absorbing rates are slow, and their resistance to metallic ions is weak.…”

Section: Introductionmentioning

confidence: 99%

A Study of the Synthesis and Properties of AM/AMPS Copolymer as Superabsorbent

Liu

Xie

Zhu

et al. 2004

Macro Materials & Eng

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Summary: A new superabsorbent polymer, PAMA, has been prepared in an aqueous solution using acrylamide (AM) and 2‐acrylamido‐2‐methyl‐propanesulfonic acid (AMPS) as monomers, potassium persulfate (PPS) as initiator, and N,N′‐methylenebisacrylamide (NMBA) as cross‐linker. The absorbing properties and water retention of PAMA have been investigated. It is found that the absorbency of PAMA can reach 2 451 and 119 g · g−1 in distilled water and in 0.9 wt.‐% NaCl solution, respectively. This copolymer also can absorb a large amount of pure methanol (277 g · g−1), a property that has not been reported for the other superabsorbent polymers in the literature. The swelling behavior of PAMA in some water/organic solvent mixtures and water retention of PAMA in sand have been investigated.

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Synthesis of Acrylic Superabsorbents

Cited by 33 publications

References 21 publications

Iron-Functionalized Membranes for Nanoparticle Synthesis and Reactions

Iron-Functionalized Membranes for Nanoparticle Synthesis and Reactions

Synthesis of porous poly(acrylamide) hydrogels using calcium carbonate and its application for slow release of potassium nitrate

A Study of the Synthesis and Properties of AM/AMPS Copolymer as Superabsorbent

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