Graft copolymerization of 2‐acrylamido‐2‐methyl‐1‐propanesulfonic acid onto carboxymethylcellulose (sodium salt) by H2O2/Fe+2 redox pair

Behari, Kunj; Pandey, Peeyoosh Kant

doi:10.1002/app.22185

Cited by 4 publications

(7 citation statements)

References 10 publications

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“…The initial increment in the grafting level with the reaction period increasing might be due to the increase in the number of active sites16 and the increase in the extension of initiation and propagation with time 12. However, the retardation of diffusion after some polymer formed on the fiber surface and the decrease in the monomer and initiator with increasing time were the reasons for the reduction of the grafting percentage and grafting efficiency 17, 18. The reduction also may have been due to the degradation of the grafted chain on the fiber 19.…”

Section: Resultsmentioning

confidence: 99%

Optimized conditions for the grafting reaction of poly(methyl methacrylate) onto oil‐palm empty fruit bunch fibers

Bakar

Mat

Isnin

2008

J of Applied Polymer Sci

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This article describes the graft copolymerization of poly(methyl methacrylate) (PMMA) onto oilpalm empty fruit bunches (OPEFBs) with a fiber length of less than 75 mm. The graft copolymerization was carried out under a nitrogen atmosphere by a free-radical initiation technique in an aqueous medium. Hydrogen peroxide and ferrous ions were used as a redox initiator/cocatalyst system. The PMMA homopolymer that formed during the reaction was removed from the grafted copolymers by Soxhlet extraction. Determining the effects of the reaction period, reaction temperature, and monomer concentration on the grafting percentage was the main objective, and they were investigated systematically. The optimum reaction period, reaction temperature, monomer concentration, and initiator concentration were 60 min, 508C, 47.15 Â 10 À3 mol, and 3.92 Â 10 À3 mol, respectively. The maximum percentage of grafting achieved under these optimum conditions was 173%. The presence of PMMA functional groups on OPEFB and the enormous reduction of the hydroxyl-group absorption band in PMMA-g-OPEFB spectra provided evidence of the successful grafting reaction. The improvement of the thermal stability of PMMA-g-OPEFB also showed the optimal achievement of the grafting reaction of PMMA onto OPEFB.

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Section: Resultsmentioning

confidence: 99%

Optimized conditions for the grafting reaction of poly(methyl methacrylate) onto oil‐palm empty fruit bunch fibers

Bakar

Mat

Isnin

2008

J of Applied Polymer Sci

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“…The new characteristic peak at 628 cm ‐1 was assigned to the stretching vibration of S–O of AMPS . The peaks between 863 and 770 cm ‐1 region are attributed to out of plane N–H wagging vibration …”

Section: Resultsmentioning

confidence: 98%

“…(a), (b) that when increasing AMPS dose, gel content was gradually increased and reached a maximum. This was due to an increase of monomer concentration in the vicinity of the CMC backbone, and as a consequence greater availability and enhancement chances for molecular collisions of reactants . However, when the AMPS dose reached 35 g, gel content decreased.…”

Section: Resultsmentioning

confidence: 99%

“…This was due to an increase of monomer concentration in the vicinity of the CMC backbone, and as a consequence greater availability and enhancement chances for molecular collisions of reactants. 19 However, when the AMPS dose reached 35 g, gel content decreased. At excess monomer concentration, the primary radicals attacked the monomer instead of reacting with the CMC backbone.…”

Section: Analysis Of Variables That Influence Gel Content Of Cmc-g-ammentioning

confidence: 99%

“…28 The peaks between 863 and 770 cm -1 region are attributed to out of plane N-H wagging vibration. 19…”

Section: Evidence Of Grafting Of Cmc-g-amps Hydrogelmentioning

confidence: 99%

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Optimization of synthesis condition for carboxymethyl cellulose‐based hydrogel from rice straw by microwave‐assisted method and its application in heavy metal ions removal

Panchan

Niamnuy

Dittanet

et al. 2017

J of Chemical Tech & Biotech

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BACKGROUND An alternative carboxymethyl cellulose‐based biosorbent hydrogel was synthesized by grafting 2‐acrylamido‐2‐methylpropanesulfonic acid (AMPS) onto the prepared carboxymethyl cellulose backbone via microwave heating. Response surface methodology was employed to optimize the hydrogel synthesis condition for maximum gel content with respect to AMPS dose, N,N′‐methylene‐bis‐acrylamide dose, and microwave exposure time. The prepared gels were then characterized and evaluated in terms of their heavy metal ions adsorption performance and reusability. RESULTS The optimum synthesis condition yielded the maximum gel content and maximum equilibrium swelling of 96.33% and 2819 ± 15%, respectively. The Langmuir model fitted the experimental isotherm data well, with maximum adsorption capacity of 86.21, 102.04 and 33.56 mg g‐1 for Cu2+, Pb2+ and Fe3+, respectively. Microwave heating was clearly noted to result in hydrogel of higher porosity and could shorten the synthesis time by 88.33%; the gel content was 7.46% higher compared with that obtained via conventional heating. CONCLUSION Microwave‐assisted heating is a feasible alternative and an efficient technique for CMC‐g‐AMPS hydrogel synthesis. The optimized CMC‐g‐AMPS hydrogel exhibited good performance for Cu2+, Pb2+ and Fe3+ ions removal and was satisfactorily reused, thus contributing to the alleviation of environmental problems caused by discarded rice straw and water contaminated with heavy metal ions. © 2017 Society of Chemical Industry

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Synthesis and characterization of chitosan‐g‐methacrylic acid and studies of its additional physicochemical properties, such as swelling, metal‐ion sorption, and flocculation behavior

Mishra

Tripathy

Srivastava

et al. 2009

J of Applied Polymer Sci

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The aim of this study was to examine the synthesis of a graft copolymer of chitosan and methacrylic acid (MAA) by free-radical polymerization with a potassium peroxymonosulfate/cyclohexanone (CY) redox system in an inert atmosphere. The optimum reaction conditions affording maximum grafting ratio (%G), grafting efficiency (%E), add on (%A), and conversion (%C) were determined. The grafting parameters were found to increase with increasing concentration of MAA up to 24 Â 10 À2 mol/dm 3 , but thereafter, these parameters decreased. With increasing concentration of peroxymonosulfate from 0.6 Â 10 À2 to 1.2 Â 10 À2 mol/dm 3 , %G, %A, and %E increased continuously. All of these grafting parameters increased with increasing concentration of CY up to 1.2 Â 10 À2 mol/dm 3 , but beyond this concentration, the grafting parameters decreased. With vari-ous concentrations of chitosan from 0.6 to 1.4 g/dm 3 , the maximum %G, %A, and %E were obtained at 1.4 g/dm 3 . %G, %A, and %C decreased continuously with various concentrations of hydrogen ions from 2 Â 10 À3 to 6 Â 10 À3 mol/dm 3 . The grafting parameters increased with increasing temperature up to 35 C, but thereafter, these parameters decreased. With increasing time period of reaction from 60 to 180 min, %G, %A, and %E increased up to 120 min, but thereafter, these parameters decreased. The graft copolymer was characterized by Fourier transform infrared spectroscopy and thermogravimetric analysis.

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Graft copolymerization of 2‐acrylamido‐2‐methyl‐1‐propanesulfonic acid onto carboxymethylcellulose (sodium salt) by H₂O₂/Fe⁺² redox pair

Cited by 4 publications

References 10 publications

Optimized conditions for the grafting reaction of poly(methyl methacrylate) onto oil‐palm empty fruit bunch fibers

Optimized conditions for the grafting reaction of poly(methyl methacrylate) onto oil‐palm empty fruit bunch fibers

Optimization of synthesis condition for carboxymethyl cellulose‐based hydrogel from rice straw by microwave‐assisted method and its application in heavy metal ions removal

Synthesis and characterization of chitosan‐g‐methacrylic acid and studies of its additional physicochemical properties, such as swelling, metal‐ion sorption, and flocculation behavior

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