Synthesis and swelling characteristics of chitosan and CMC grafted sodium acrylate-co-acrylamide using modified nanoclay and examining its efficacy for removal of dyes

Nagarpita, M.V.; Roy, Pratik; Shruthi, S. B.; Sailaja, R. R. N.

doi:10.1016/j.ijbiomac.2017.04.099

Cited by 65 publications

(22 citation statements)

References 50 publications

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“…It is sensitive to the pH of the medium as it readily dissolves at low pH while it is insoluble at high pH [3]. Although chitosan has commonly employed in various fields such as water treatment [4,5,6], drug release [7], packaging films [8], and agriculture [9], many efforts are exerted to modify its structure by grafting and crosslinking to enhance specific properties such as the ability to absorb and retain large amount of fluid. This type of modification creates a material combining the properties of the natural material and the synthetic part.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Poly(Acrylamide-Graft-Chitosan) Hydrogel: Optimization of The Grafting Parameters and Swelling Studies

Ibrahim¹

2019

AJPST

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Hydrogel polymers were prepared via graft polymerization of acrylamide (AAm) onto chitosan (CTS) backbone in the presence of methylene bisacrylamide (MBA) as cross-linker and ammonium persulfate (APS) as an initiator. Optimizing the crosslinking graft reaction of AAm onto CTS was studied by varying the concentration of CTS and MBA cross-linker and discussing the effect of these conditions on the gel fraction and the grafting parameters. The grafting parameters; grafting percentage (%GP), grafting efficiency (%GE), Add-on (%A) and homopolymer (%H) were studied as a function of the chitosan and the cross-linker concentrations. Also the swelling properties of the prepared hydrogel were examined. In this research, the simple second order kinetic model proposed by Schott has been carried out to describe the swelling mechanism. The effect of the grafting reaction on the thermal properties of the chitosan was also investigated by the thermal gravimetric analysis (TGA). The structure of the prepared hydrogel polymer was confirmed by FT-IR spectra. The porous structure of the hydrogel was observed by the Scanning Electron Microscope (SEM) and also the elemental composition of the prepared hydrogel was identified by using the energy dispersive X-ray (EDX).

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Section: Introductionmentioning

confidence: 99%

Synthesis of Poly(Acrylamide-Graft-Chitosan) Hydrogel: Optimization of The Grafting Parameters and Swelling Studies

Ibrahim¹

2019

AJPST

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“…The poor interfacial adhesion between PP and the nanoclay results in poor mechanical properties of the compound . Attempts have been made, also relatively recently, to modify the nanoclay and improve its dispersity by surface modification of nanoclay …”

Section: Introductionmentioning

confidence: 99%

“…The surface modification process was conducted with an amino‐silane coupling agent, which has a unique bifunctional structure . It causes hydrolysis and condensation reactions between the clay and the silane and binds to the clay surface, thereby reducing the hydrophilicity of the nanoclay surface . In the compounding process, PP‐graft‐maleic anhydride (PP‐g‐MA), a compatibilizer, forms a covalent bond by an imide reaction between the modified clay and the succinic anhydride part of PP‐g‐MA and the clay is effectively dispersed in the PP matrix by improving the melt shearing force applied to the clay …”

Section: Introductionmentioning

confidence: 99%

Improvements in the oxygen barrier property of polypropylene nanocomposites

Kim

Ryu

Kim

2018

Polymers for Advanced Techs

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A nanocomposite consisting of polypropylene (PP)/nanoclay (montmorillonite) was prepared by means of a melt-compounding process with the use of a twin-screw extruder. Because of the complex dispersion of polar and hydrophilic clays that have many cations in the nonpolar and hydrophobic PP, amino-silane was introduced to modify the surface of the clays. Also, to improve the compatibility of the modified nanoclay with PP, a PP-graft-maleic anhydride was used as a compatibilizer. From Fourier transform infrared spectroscopy analysis and the mechanical property test results, it was confirmed that the surface of the nanoclay was properly modified, and it was successfully dispersed in the PP matrix. The composite was investigated by electron microscopy to analyze its morphology and the degree of dispersion of the nanoclay. An analysis of oxygen permeability according to nanoclay content was performed, and it was found that the higher nanoclay content makes the decrease in oxygen permeability. In addition, a shelf-life test was carried out to determine the relationship between decreased oxygen permeability and food preservation performance. The preservation performance of the food package prepared with the resin made in this study was improved because of the improvement in mechanical properties and oxygen barrier property.

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“…Consequently, the treatment of dye-containing effluents has been extensively studied, and various treatment methods including coagulation, precipitation, adsorption and filtration [3,4] have been developed. Adsorption is one of the most commonly used treatment methods due to its low-cost, simplicity, high efficiency and environmental friendliness [5], and many adsorbents, such as superabsorbent polymers [6], activated carbon [7], graphene oxide [8], clay [9], and so on, have been used. Superabsorbent polymer (SAP), a three-dimensional cross-linked hydrophilic polymer with the advantages of functionalized groups, high water absorption, environmental safety, and low-cost, has been found to be an ideal adsorbent for dye removal.…”

Section: Introductionmentioning

confidence: 99%

Preparation of the Sodium Alginate-g-(Polyacrylic Acid-co-Allyltrimethylammonium Chloride) Polyampholytic Superabsorbent Polymer and Its Dye Adsorption Property

Tang

Zhao

Wang³

et al. 2018

Marine Drugs

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A polyampholytic superabsorbent polymer (PASAP), sodium alginate-g-(polyacrylic acid-co-allyltrimethylammonium chloride) (SA-g-(PAA-co-PTM)), was prepared by free-radical graft copolymerization and characterized. The polymer exhibited pH-dependent swelling behaviors with extremely high swelling ratios, and was saline tolerant. The dye adsorption properties of SA-g-(PAA-co-PTM) were investigated using methylene blue (MB) as a cationic dye model. It was found that its dye adsorption capacity was significantly affected by the TM content in PASAP and pH of dye solution. The dye adsorption kinetics and isotherm obey the pseudo-second-order kinetic model and the Langmuir isotherm model, respectively, and the adsorption process is chemisorption in nature. In addition, SA-g-(PAA-co-PTM) exhibited high MB adsorption capacities in a wide pH range and reusability in at least five adsorption-desorption cycles, indicating its great application potentials as the adsorbent for dye removals from effluents.

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Synthesis and swelling characteristics of chitosan and CMC grafted sodium acrylate-co-acrylamide using modified nanoclay and examining its efficacy for removal of dyes

Cited by 65 publications

References 50 publications

Synthesis of Poly(Acrylamide-Graft-Chitosan) Hydrogel: Optimization of The Grafting Parameters and Swelling Studies

Synthesis of Poly(Acrylamide-Graft-Chitosan) Hydrogel: Optimization of The Grafting Parameters and Swelling Studies

Improvements in the oxygen barrier property of polypropylene nanocomposites

Preparation of the Sodium Alginate-g-(Polyacrylic Acid-co-Allyltrimethylammonium Chloride) Polyampholytic Superabsorbent Polymer and Its Dye Adsorption Property

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