M. Kurdtabar

Islamic Azad University, Karaj · Department of chemistry

Ensuring the availability of water resources that are both clean and safe is crucial for the preservation of environmental health and the well‐being of humans. Here, we fabricated carboxymethyl cellulose‐based hydrogel nanocomposite using acrylic acid (AA) and 2‐acrylamido‐2‐methylpropane sulfuric acid (AMPS) monomers and Fe3O4 nanoparticles throug...

A CMC-g-poly(AA-co-AMPS)/Fe3O4 hydrogel nanocomposite was successfully designed and prepared via graft copolymerization of AA and AMPS on CMC followed by the cross-linking addition of FeCl3/FeCl2. The synthesized hydrogel nanocomposite was characterized by Fourier-transform infrared (FT-IR) spectroscopy, scanning electron microscopy (SEM), transmis...

Lead and Cadmium, identified as toxic heavy metals, can cause a significant imbalance in the ecosystem due to their tendency to bioaccumulate. These metals can be seriously harmful to human health and the environment. In this work, a magnetic nanocomposite hydrogel was produced via grafting copolymerization of acrylic acid (AA) and acrylamide (AAm)...

In this study, we demonstrated a new design technique for producing DNNH based on gellan‐gum crosslinked by octavinyl polyhedral oligomeric silsesquioxane. Incorporating OV‐POSS nanoparticles as cross‐linkers into the first and second networks created strong coordination contacts and improved mechanical performance with 90% water. pH and contact ti...

Background: Cell culture has a crucial role in many applications in biotechnology. The production of vaccines, recombinant proteins, tissue engineering, and stem cell therapy all need cell culture. Most of these activities needed adherent cells to move, which should be trypsinized several times until received on a large scale. Although trypsin is...

In this work, magnetic nanocomposite hydrogel was produced via grafting copolymerization of acrylic acid (AA) and acrylamide (AAm) in the presence of MnFe 2 O 4 @SiO 2 @Vinyltrimethylsilane (VTMS) as a cross-linking agent. To effectively absorb Pb (II) and Cd (II) from an aqueous solution, the prepared magnetic nanocomposite hydrogel was applied. X...

The fabrication of a suitable polymeric network could help to design an efficient drug delivery platform for modulating the release of therapeutic molecules. To this aim, the fabrication of a new gellan-based magnetic double network hydrogel nanocomposite (MDNH) was investigated in the current work. The crosslinking agents were prepared by samples...

Nanocomposite hydrogels are one of the most important types of biomaterials which can be used in many different applications such as drug delivery and tissue engineering. Incorporation of nanoparticles within a hydrogel matrix can provide unique characteristics like remote stimulate and improved mechanical strength. In this study, the synthesis of...

Collagen-(AMPS-MAA/AAm)-Fe3O4@SiO2 magnetic double-network nanocomposite hydrogel (DNNH) was synthesized through in-situ free-radical copolymerization under ultrasound-assisted condition. The pure double-network hydrogels (PDNH) and their magnetic composite structure were systematically characterized through XRD, FTIR, SEM-EDS, VSM, DTG, and tensil...

In this paper, a novel iron oxide nanocomposite hydrogel was prepared by simultaneous formation of superparamagnetic iron oxide nanoparticles and cross-linking of poly(acrylic acid) grafted onto sodium alginate polysaccharide. The prepared optimized hydrogel was characterized by Fourier transform infrared spectroscopy, thermogravimetric analysis, s...

In this article, a novel stimuli hydrogel was prepared by simultaneous formation of iron oxide nanoparticles (IONs) and crosslinking of poly((2-dimethylamino)ethyl methacrylate) grafted onto sodium alginate. The structural and morphological properties of hydrogel were characterized by Fourier transform infrared spectroscopy, thermal gravimetric ana...

In this study, the collagen-g-poly(acrylic acid-co-N-vinylpyrrolidone)/Fe3O4@SiO2 (collagen-g-p(AA-co-NVP)/Fe3O4@SiO2) as magnetic nanocomposite hydrogel was synthesized by graft copolymerization of acrylic acid (AA) and N-vinylpyrrolidone (NVP) onto collagen in the presence of the Fe3O4@SiO2 using ammonium persulfate as a free radical initiator an...

In this study, at first, gold nanorods (GNRs) were synthesized and then they were coated with a layer of hydrogel composed of poly(N-isopropylacrylamide) (PNIPAM) grafted onto carboxymethyl cellulose (CMC) as a backbone. The chemical structure of GNRs/PNIPAM-g-CMC hydrogel was characterized by Fourier transform infrared (FT-IR), thermogravimetric a...

In the present study, synthesis of poly(AAm-co-AMPS)/Na-MMT hydrogel nanocomposite with different amount of bis[2-(methacryloyloxy)ethyl] phosphate as a crosslinker was successfully carried out for the removal of crystal violet (CV), methylene blue (MB) and methyl red (MR) from aqueous solution. Hydrogel nanocomposite was characterized by FT-IR, SE...

Over the last decade, nanocomposite hydrogels have been provided a new approach for the biomedical field. In this work, a novel pH-responsive nanocomposite hydrogel was fabricated using simultaneous in situ formation of magnetite iron oxide nanoparticles and hydrogel networks of poly(acrylic acid) grafted onto chitosan. The effects of various types...

In this study, hydrogel polymer was synthesized by incorporation of acrylic acid (AA), vinylphosphonic acid (VPA) and N-maleyl chitosan which was prepared through the acylation reaction between maleic anhydride and chitosan. N-maleyl chitosan crosslinked P(AA-co-VPA) hydrogel was utilized for the effective adsorption of crystal violet (CV) and meth...

In this report, the synthesis of a novel biocompatible magnetic hydrogel nanocomposite based on carboxymethyl cellulose (CMC), as an eco-friend, biocompatible and green polysaccharide, is described via a facile one pot approach using magnetic iron oxide nanoparticles (MIONs) as a crosslinker. The structure of the prepared MION–CMC hydrogel nanocomp...

5-HT1A receptors have been implicated in the pathogenesis of a wide variety of disorders related to the serotonin receptors. WAY100635 is a well-known high affinity 5-HT1A receptor antagonist. Many ¹¹C and ¹⁸F radiolabeled derivatives and its radioiodinated analogues have been reported as imaging agents for 5-HT1A receptors. In this regard, the syn...

Collagen-based hydrogel nanocomposites, as adsorbent systems in wastewater treatment, were prepared by graft copolymerization of acrylamide and maleic anhydride onto hydrolyzed collagen using ammonium persulfate as an initiator and sodium montmorillonite as a nanoclay. The properties of synthesized adsorbents were characterized by Fourier transform...

Superadsorbent poly (acrylamide-co-itaconic acid)/nanoclay hydrogels were prepared by in situ free-radical polymerization of acrylamide and itaconic acid in an aqueous media with nanoclay as a crosslinker. The properties of nanocomposite hydrogels (NCHs) were characterized by FTIR spectroscopy, XRD patterns, and TGA thermal methods. Morphology of t...

A series of collagen-based hydrogel nanocomposites were prepared and applied as dye adsorbents. The certain variables affecting the dye adsorption such as initial concentration of dye solution, pH value, contact time and montmorilonite content were investigated to achieve maximum removal of Methylene Green (MG) and Crystal Violet (CV) from aqueous...

The aim of the work reported was to investigate the effect of bases and neutralization steps on hydrogel microstructures. A series of porous hydrogels with various pore sizes were prepared by neutralizing a conventional hydrogel after gel formation. Scanning electron microscopy was used to characterize the microstructure of the porous hydrogels. Th...

The use of super-swelling polymers is steadily increasing and the applications in industry are continuing to grow. With the authorization of the superabsorbents in food packaging by the Food and Drug Administration recently, demand may soon take off in the market. However, the increase in prices of petroleum products in recent years may be a drawba...

D-glucosamine, as a representative polyfunctional compound, is a bioactive amino sugar. In this study, the gas phase thermochemical properties of D-glucosamine, including its Metal Ion Affinity (MIA), metal binding sites, Anion Affinity (AA), acidity and proton affinity, have been explored, using the Density Functional Theory (DFT) and a 6-311++G**...

A novel approach was developed to prepare a highly porous hydrogel with superior salt- and pH-resisting properties. According to this method, synthetic comonomers, i.e. acrylic acid (AA) and 2-acrylamido-2-methylpropanesulfonic acid (AMPS), were polymerized and crosslinked in the presence of hydrolyzed collagen as a natural backbone. The characteri...

A novel hydrolyzed collagen-based hydrogel has been prepared by grafting the binary mixture of acrylamide and 2-acrylamido-2-methylpropanesulfonic acid onto the collagen backbone in the presence of a crosslinking agent. Its physicochemical properties in aqueous solution were studied. The effect of reaction variables on both gel content and swelling...

In this contribution we have developed a collagen-based highly porous hydrogel by neutralizing the grafted poly(acrylamide-co-acrylic acid) after gel formation. Preparation of the hydrogels involved free radical polymerization of a combination of hydrolyzed collagen, acrylic acid (AA), acrylamide (AAm) and distilled water, in appropriate amounts an...

A novel biopolymer-based superabsorbent hydrogel was synthesized through chemical crosslinking by graft copolymerization of partially neutralized acrylic acid onto the hydrolyzed collagen, in the presence of a crosslinking agent and a free radical initiator. The Taguchi method, a robust experimental design, was employed for the optimization of the...

In this work, we synthesize a novel protein-based superabsorbent hydrogel and study its swelling behavior. The crosslinking graft copolymerization of acrylic acid (AA) onto the hydrolyzed collagen as a protein backbone was carried out in a homogeneous medium. Potassium persulfate (KPS) as an initiator and N,N′-methylene bisacrylamide (MBA) as a cro...