Ionic liquid hydrogel templates: Bulkgel, cryogel, and microgel to be used for metal nanoparticle preparation and catalysis

Yıldız, Sema; Şahiner, Mehtap; Şahiner, Nurettin

doi:10.1016/j.eurpolymj.2015.07.005

Cited by 21 publications

(9 citation statements)

References 38 publications

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“…All of the samples showed a broad absorption at 3360 cm –1 indicative of the N–H bond, 1650 cm –1 absorption due to the amide carbonyl group, a 1540 cm –1 band for the secondary amine (from BisAAm and APTMAC), an aliphatic C–H stretching band around 2840–3000 cm –1 , and a broad absorption band at ∼540 cm –1 . , All resins that contained acrylamide also showed the C–C stretching absorption at 1090 cm –1 and broad adsorption at 3250 cm –1 for the other N–H band of the monomer . As can be seen in Figure , with increasing APTMAC content, the resins show the characteristic absorption bands of PAPTMAC at 1200, 1475, 1540, 1650, and 3360 cm –1 . , However, since most of the peaks of the APTMAC are close and/or overlap with the FTIR absorption of the AAm and BisAAm, the best indication of the incorporation of APTMAC into the resin is the evolution of the 1540 cm –1 peak as the APTMAC content increases. It should be noted, however, that the difference between the copolymer resins are very small compared to the resins with 100% AAm and 100% APTMAC.…”

Section: Resultsmentioning

confidence: 97%

“…29 As can be seen in Figure 2, with increasing APTMAC content, the resins show the characteristic absorption bands of PAPTMAC at 1200, 1475, 1540, 1650, and 3360 cm −1 . 31,32 However, since most of the peaks of the APTMAC are close and/or overlap with the FTIR absorption of the AAm and BisAAm, the best indication of the incorporation of APTMAC into the resin is the evolution of the 1540 cm −1 peak as the APTMAC content increases. It should be noted, however, that the difference between the copolymer resins are very small compared to the resins with 100% AAm and 100% APTMAC.…”

Section: Acs Applied Polymer Materialsmentioning

confidence: 99%

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One-Pot Synthesis of Cross-Linked Polymer Networks as a Hydrophilic Super-Adsorbent for Efficient Recovery of Heparin

Enayati

Eskandarloo

Abbaspourrad

2019

ACS Appl. Polym. Mater.

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Heparin is a naturally occurring sulfated glycosaminoglycan polysaccharide often used as an anticoagulant agent. In this work, a series of water swellable cross-linked polymer networks consisting of acrylamide (AAm) as a support, N,N′methylene bis(acrylamide) (BisAAm) as a cross-linker, and (3-acrylamidopropyl)-trimethylammonium chloride) (APTMAC) as a heparin adsorbent was synthesized in water at different ratios of AAm to APTMAC in one-pot. A two-step polymerization process was used to incorporate APTMAC as an adsorbent primarily on the surface of the preformed but still growing crosslinked AAm support (X-AAm). Heparin adsorption results showed that the sample with 15 mol % APTMAC incorporated into the X-AAm core demonstrated efficiency as high as the 100% APTMAC resin, with a high adsorption capacity of 223.36 mg g −1 , which makes it the sample of choice for industrial application and cost-effectiveness. The adsorption efficiency of the optimized sample, X-AAm-APTMAC-(85−15) (that contains 15 mol % APTMAC), was evaluated versus some of the operational variables, including adsorbent dosage, initial heparin concentration, temperature, pH, and time as well as the stability and reusability of the resin, which showed satisfying performance in a wide range of operational parameters with suitable stability and reusability. Heparin was efficiently adsorbed by the X-AAm-APTMAC-(85−15) from a biological sample containing enzymatically digested heparin. The calculated bioactivity of heparin eluted from X-AAm-APTMAC-(85−15) beads and Amberlite FPA98 Cl, an industrially available adsorbent for heparin recovery, was 3430 and 2623 units, respectively. Therefore, the eluted heparin that adsorbed from the biological mixture using synthesized resin complies with the requirement of the United States Pharmacopeia.

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Section: Resultsmentioning

confidence: 97%

Section: Acs Applied Polymer Materialsmentioning

confidence: 99%

One-Pot Synthesis of Cross-Linked Polymer Networks as a Hydrophilic Super-Adsorbent for Efficient Recovery of Heparin

Enayati

Eskandarloo

Abbaspourrad

2019

ACS Appl. Polym. Mater.

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“…The silver nanoparticles are expected to possess high catalytic properties; however, these also encounter the issue of aggregation. Some researchers have used different synthetic hydrogels to overcome their 22,28 aggregation; however, such synthetic hydrogels increase the overall cost of specific environmental application based on such Ag-based [29][30][31] hydrogels. Therefore, the current study was aimed to use gelatin; an environment-friendly, biodegradable, and a low-cost substrate, as a support material for silver nanoparticles to explore its catalytic performance.…”

Section: Introduction Thmentioning

confidence: 99%

Fast 4-nitrophenol Reduction Using Gelatin Hydrogel Containing Silver Nanoparticles

Ul‐Islam¹,

Ali²,

Khan³

et al. 2020

Eng. Sci.

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The current study reports the synthesis of gelatin hydrogel containing silver nanoparticles (AgNPs) and its role as a catalyst. A porous gelatin hydrogel, with pore size of 15-100 nm, was prepared by cooling its hot solution to room temperature with glutaraldehyde as crosslinker. The gelatin hydrogel was immersed in 1 mM silver nitrate solution for 24 h through ex-situ impregnation. The impregnation of AgNPs was confirmed through field-emission scanning electron microscopy (FE-SEM) which showed uniform dispersion of nanoparticles on the hydrogel surface and partial impregnation into the matrix. Thermogravimetric analysis (TGA) showed the impregnation of 9 wt% of AgNPs in the hydrogel composite which also contributed to its improved thermal properties. X-ray diffraction (XRD) analysis confirmed the amorphous nature of gelatin and addition of AgNPs. The AgNPs/gelatin hydrogel effectively reduced 4-nitrophenol by sodium tetrahydroborate at a reaction rate constant of 0.498-1 min. The prepared AgNPs/gelatin hydrogel could be used as a catalyst for other similar type of reactions.

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“…They reported two different ways of binding the amine molecules to the AuNPs: (1) a weakly electrostatic complex bonding involving protonated amine molecules and (2) AuNP interaction with surface‐bound chloroaurate ions, where AuCl(NH 2 R) complexes presented strong bonds. Several methods for the in situ synthesis of metal nanoparticles (i.e., Au, Cu, Co, Pt, Ni, and Ru) with hydrogels as a polymeric network template in several forms, such as bulk gels, cryogels, and microgels, have recently been reported . Some authors synthesized AuNPs through the reduction of HAuCl 4 with core–shell microgels of poly( N ‐isopropyl acrylamide)/polyethyleneimine and poly( N ‐isopropyl acrylamide)/polystyrene .…”

Section: Introductionmentioning

confidence: 99%

“…Others reported the synthesis of yolk–shell poly( N ‐isopropyl acrylamide) particles . The incorporation of metal nanoparticles into the network microgel improves its mechanical properties and can also impart electrical, magnetic, and catalytic features to the microgels. Zhang and Kumacheva used poly(acrylic acid) microgels for the synthesis of semiconductor, metal, and magnetic nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Size‐controlled gold nanoparticles inside polyacrylamide microgels

Díaz

Barrera

López-Cuenca

et al. 2016

J of Applied Polymer Sci

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Gold nanoparticles (AuNPs) of different sizes were synthesized into a crosslinked network of polyacrylamide (PAAm) microgels. PAAm was prepared by means of semicontinuous inverse heterophase polymerization under monomer‐starving conditions with a z‐average particle size of 384 ± 18 nm. AuNPs with controlled size were obtained by a reduction reaction of Au+3 to Au0 from a gold(III) chloride trihydrate (HAuCl4) solution inside microgel the crosslinked network (AuNP‐PAAm). The reduction reaction was verified for 2 h by ultraviolet–visible spectroscopy (UV–vis). AuNP–PAAm exhibited a particle size between 288 ± 12 and 230 ± 15 nm at HAuCl4 concentrations of 0.4 and 1.3 mM, respectively. The AuNP–PAAms were observed by transmission electron microscopy, and their sizes were determined to be 19 ± 2 nm (1.3 mM) and 17 ± 2 nm (1.1 mM). With UV–vis spectroscopy, we detected the formation of AuNPs at a wavelength of 552 nm, and with X‐ray diffraction analysis, we proved that the crystal arrangement was face‐centered cubic. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 43560.

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Ionic liquid hydrogel templates: Bulkgel, cryogel, and microgel to be used for metal nanoparticle preparation and catalysis

Cited by 21 publications

References 38 publications

One-Pot Synthesis of Cross-Linked Polymer Networks as a Hydrophilic Super-Adsorbent for Efficient Recovery of Heparin

One-Pot Synthesis of Cross-Linked Polymer Networks as a Hydrophilic Super-Adsorbent for Efficient Recovery of Heparin

Fast 4-nitrophenol Reduction Using Gelatin Hydrogel Containing Silver Nanoparticles

Size‐controlled gold nanoparticles inside polyacrylamide microgels

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