Borohydride reduction of Ag+ in aqueous poly(acrylic acid-co-acrylamide) solutions

Buikliskii, V. D.; Levchenko, V. F.; Popov, F. A.; Sheremet, M.

doi:10.1134/s1061933x12010048

Cited by 2 publications

(2 citation statements)

References 6 publications

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“…A well-developed fibrous with smooth irregular pores and lamina structural nature occurred on the surface of the powdered HCG-2 superabsorbent hydrogel as shown in Figure 6b. This clearly showed an ester crosslink between polymer units of HCG-1 with maleic acid forming a 3-dimensional crystalline structure (HCG-2) polymer (Buikliskii et al, 2012).…”

Section: Scanning Electron Microscope (Sem) Of Hcg-1 and Hcg-2 Supera...mentioning

confidence: 95%

Green superabsorbent hydrogel derived from activated charcoal and glycerol with maleic acid as a cross-linker

Kasimu,

Mbuvi,

Maingi

2024

JES

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Superabsorbent hydrogels characterize a set of polymeric materials with three-dimensional structures capable of absorbing large amounts of water due to their hydrophilic functional groups on their surface. Their application in industries, agriculture, and the environment is of primary significance. This study reports the synthesis and characterization of green superabsorbent hydrogels derived from activated charcoal. The process involved a polymerization reaction between activated charcoal (AC) with glycerol (G) using sodium hydroxide as an initiator in the absence and presence of maleic acid as a crosslinker to synthesize HCG-1 and HCG-2 superabsorbent hydrogel respectively. Characterization of the hydrogels was done using Fourier transform infrared (FT-IR) spectroscopy, scanning electron microscope (SEM), and X-ray diffraction (XRD). Optimization conditions were done by synthesizing hydrogel with varying dosages of both activated carbon and maleic acid as well as swelling time. The FT-IR results showed the appearance of strong sharp peaks at 1591.34 cm-1 and 1400.28 cm-1 in HCG-1 associated with -COO¯ symmetric stretching and asymmetric bending vibrations, indicating interlink between reacting monomers. A new absorption band at 1639.48 cm-1 associated with -COO¯ bending in non-conjugated ester indicates ester-crosslink in HCG-2 hydrogel. XRD analysis showed a phase shift from semi-crystalline to crystalline structure upon crosslinking. SEM analysis showed a crystalline intact, rigid structure without voids and pores on its surface in HCG-1 compared to the smooth irregular pores and lamina structure observed in HCG-2 hydrogel. The dosage ratio of AC: G: maleic acid of 8:5:1 produced hydrogel with an optimal water absorption capacity of 1255.80±0.70%. Maleic acid was found to improve the water absorption capacity of the superabsorbent. The study is an eye opener towards the application of biodegradable hydrogels in agriculture, especially in semi and arid regions.

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Section: Scanning Electron Microscope (Sem) Of Hcg-1 and Hcg-2 Supera...mentioning

confidence: 95%

Green superabsorbent hydrogel derived from activated charcoal and glycerol with maleic acid as a cross-linker

Kasimu,

Mbuvi,

Maingi

2024

JES

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“…Poly(acrylic acid-co-acrylamide) (Yiamsawas et al, 2008;Thomas et al, 2007;Buikliskii et al, 2012;Mohan et al, 2010;Aggor et al, 2010), poly(acrylamide)/poly(vinyl pyrrolidone) (Murthy et al, 2008), poly(acrylamide)/poly(vinyl alcohol) , poly(2-hydroxyethyl methacrylate-co-acrylic acid) (Gils et al, 2010) , poly(ethylene glycol dimethacrylate-co-acrylonitrile) (Kim et al, 2004), poly(N-isopropylacrylamide)-cosodium acrylate) Mohan et al, 2006); poly(N-isopropylacrylamide-co-acrylic acidco-butylmethacrylate) (Thatiparti et al, 2009), poly (acrylamide-co-2-acrylamido-2-methylpropanesulfonic acid) (Ravindra et al, 2012), poly(2-hydroxyethyl methacrylate-(poly(ethylene glycol) methyl ether methacrylate-methacrylic acid) (Xiang and Chen, 2007), poly(N,N-dimethylacrylamide)-g-poly(vinyl alcohol) (Luo et al, 2009) and poly(2-hydroxylethyl acrylate)epoly(ethylenimine) (Ho et al, 2004) based hydrogel-silver nanocomposites have been previously synthesized.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Copolymeric and Terpolymeric Hydrogel-Silver Nanocomposites Based on Acrylic Acid, Acrylamide and Itaconic Acid: Investigation of Their Antibacterial Activity Against Gram-Negative Bacteria

Bal

Çepni

Çakır

et al. 2015

Braz. J. Chem. Eng.

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-In this study, copolymeric and terpolymeric hydrogel-silver nanocomposites based on poly(acrylamideco-itaconic acid), poly(acrylic acid-co-itaconic acid) and poly(acrylic acid-co-acrylamide-co-itaconic acid) were synthesized by free-radical polymerization. These nanocomposites were characterized by Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy (SEM), UV-Visible Spectrophotometry (UVVis) and X-Ray Diffraction (XRD) analysis, as well as their swelling behaviors. In addition, antibacterial properties of these hydrogel-silver nanocomposites were investigated against Pseudomonas aeruginosa. Acrylic-based hydrogel-silver nanocomposites demonstrated antibacterial activity against Gram-negative bacteria. These hydrogel-silver nanocomposites can be used as antibacterial material in the medical field.

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Borohydride reduction of Ag+ in aqueous poly(acrylic acid-co-acrylamide) solutions

Cited by 2 publications

References 6 publications

Green superabsorbent hydrogel derived from activated charcoal and glycerol with maleic acid as a cross-linker

Green superabsorbent hydrogel derived from activated charcoal and glycerol with maleic acid as a cross-linker

Synthesis and Characterization of Copolymeric and Terpolymeric Hydrogel-Silver Nanocomposites Based on Acrylic Acid, Acrylamide and Itaconic Acid: Investigation of Their Antibacterial Activity Against Gram-Negative Bacteria

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