Synthesis of modified chitosan TiO2 and SiO2 hydrogel nanocomposites for cadmium removal

Banivaheb, Soudeh; Dan, Sasan; Hashemipour, Hassan; Kalantari, Maryam

doi:10.1016/j.jscs.2021.101283

Cited by 43 publications

(8 citation statements)

References 35 publications

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“…In this study, the microfluidization technique was used to homogeneously disperse two different nanofillers in a biopolymer matrix for different biomedical aspects. As a base matrix material, natural biopolymer chitosan was selected due to its good biocompatibility, 6,30 antimicrobial activity, 31,32 and biodegradability, 33 which makes it one of the ideal polymer materials for biomedical applications. 34 Therefore, high-and low-molecular-weight chitosan was used to prepare nanocomposites with two fillers, that is, MMT and POSS, respectively.…”

Section: Resultsmentioning

confidence: 99%

Microfluidic‐assisted preparation of nano and microscale chitosan based 3D composite materials: Comparison with conventional methods

Kımna

Deger

Tamburacı

et al. 2022

J of Applied Polymer Sci

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Although nanofillers contribute to improved physical characteristics and biological functionalities of polymer-based biomaterials, their dispersion in polymer matrices is still a challenging issue in terms of obtaining consistency for the inherent properties. To tackle this problem, homogenization techniques are applied to disperse the nanofillers in such polymers, however, these methods can cause undesired changes especially in the rheological properties and the physical structure of the biopolymer matrices. Recently, as a novel homogenization technique, microfluidization has been used to homogenize polymer nanocomposites to minimize these limitations. In this study, two different nanocomposite structures as chitosan/montmorillonite (CS/MMT) and chitosan/polyhedral oligomeric silsesquioxane nanocages (CS/POSS) were homogenized with microfluidization and investigated in terms of physical alterations. Furthermore, the effect of microfluidizer technique on material characteristics was compared with conventional homogenization techniques, i.e., ultrasonic bath and sonication in terms of solution, nano -(e.g., hydrodynamic size, drug encapsulation) and macroscopic material characteristics (e.g., porosity, mechanical properties, swelling and thermal degradation). It was found that the microfluidizer homogenization improves the physical characteristics in both nano and macroscale materials: Nanospheres obtained from CS/MMT composites showed enhanced stability, uniform size distribution (<100 nm, PDI: <0.2), and good encapsulation efficiency (>50%) whereas 3D porous CS/POSS scaffolds showed improved structural uniformity (i.e., homogeneous and interconnected microstructure) and enhanced thermal and mechanical properties. The obtained results indicate that the microfluidizer homogenization ensures a successful nanofiller dispersion in polymer matrices, thereby improving the biomaterial characteristics impressively compared to the sonication methods. K E Y W O R D S biomaterials, mechanical properties, microscopy, polysaccharides, porous materials Ceren Kimna and Sedef Tamburaci have equal contribution in this study.

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Section: Resultsmentioning

confidence: 99%

Microfluidic‐assisted preparation of nano and microscale chitosan based 3D composite materials: Comparison with conventional methods

Kımna

Deger

Tamburacı

et al. 2022

J of Applied Polymer Sci

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“…In a recent work it was shown that the nano‐composites made of TiO 2 can efficiently remove heavy metals from aqueous solutions. [ 50 ]…”

Section: Nano‐biocompositesmentioning

confidence: 99%

Biopolymer‐Based Nanocomposites for Removal of Cr(VI) from Aqueous Systems: A Review

Shukla

Garg

et al. 2023

CLEAN Soil Air Water

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Hexavalent chromium Cr(VI) has emerged as a contaminant of prime concern for the environmentalists because of its improper disposal by tannery, dye, and electroplating industries. Adsorption is the most exploited method for its removal from industrial wastewater because of its high removal efficiency even at low Cr(VI) concentration, minimal sludge, and ease of regeneration. In recent years, several adsorbents of biological origin such as plants, algae, fungi, and bacteria have been explored for Cr(VI) remediation. This review comprehends the recent studies involving usage of biopolymer‐based nano‐composites with respect to its adsorption mechanisms, adsorption capacities, isotherms, and kinetics. The conventional abiotic and biotic techniques for removal of Cr(VI) are also discussed with a comparative insight of their adsorption capacity and removal efficiency. Nano‐biocomposites integrate the functional properties of both nanoparticles and biopolymers, which make them efficient biosorbents. Nano‐biocomposites offer a large surface area, reduced particle loss, minimal particle agglomeration on the surface, and high stability. Common kinetic models among the nano‐biocomposites, and various equilibrium models are also analyzed to understand the mode of adsorption and associated factors. These materials are mostly found to follow monolayer adsorption with ion exchange, electrostatic interaction, and surface complexation as major players in the process.

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“…The TiO 2 incorporated nanocomposite hydrogels are found to be effective adsorbents towards heavy metal ions and dyes from their aqueous solutions 30,31 . Titanium dioxide nanocomposite hydrogel with chitosan‐g‐(acrylamide‐co‐itaconic acid) is reported which showed antibacterial activities towards Staphylococcus aureus and Escherichia coli bacteria and also a good adsorbent for Cd 2+ ions 32,33 . Synthesis of a magnetic hydrogel based on poly acrylamide grafted carboxymethyl cellulose embedded with porous carbon and citric acid with Fe 3 O 4 nanoparticles is reported 34 .…”

Section: Introductionmentioning

confidence: 99%

“…30,31 Titanium dioxide nanocomposite hydrogel with chitosan-g-(acrylamide-co-itaconic acid) is reported which showed antibacterial activities towards Staphylococcus aureus and Escherichia coli bacteria and also a good adsorbent for Cd 2+ ions. 32,33 Synthesis of a magnetic hydrogel based on poly acrylamide grafted carboxymethyl cellulose embedded with porous carbon and citric acid with Fe 3 O 4 nanoparticles is reported. 34 That magnetic nanocomposite hydrogel is a potent adsorber towards both Pb 2+ ions and MB dye.…”

Section: Introductionmentioning

confidence: 99%

Sodium alginate‐cl‐poly (N,N‐dimethyl acryl amide‐co‐2‐acrylamino‐2‐methyl‐1‐propane sulphonic acid)/titanium dioxide nanocomposite hydrogel: An efficient dye‐removing agent

Samanta

Mandal

Tripathy

2022

J of Applied Polymer Sci

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Sodium alginate (SAG) crosslinked poly (N,N-dimethyl Acrylamide-co-2 acrylamino-2-methyl-1-propane sulfonic acid)/Titanium dioxide [SAG-cl-poly (N,N-DMA-co-AMPS)/TiO 2 ] nanocomposite hydrogel (NCHG) was prepared by in situ crosslinked free radical polymerization technique using SAG, a mixture of DMA and AMPS and titanium isopropoxide in presence of methylenebis-acrylamide as a cross linking agent. Different characterization techniques are used to characterize NCHG. Water swelling behavior of NCHG together with swelling kinetics is evaluated. Maximum swelling (35% at 30 min) is observed at pH 8. NCHG is used for the removal of one cationic dye methylene blue (MB) and one anionic dye carmosine-A (CR-A) from their aqueous solution. Adsorption dynamics, kinetics and isotherms are evaluated. Maximum dye adsorption occurs at pH 8 and 2, at time 50 min for both the cases, at temperature 60 C, 40 C for MB and CR-A respectively. Pseudo-second order kinetics and Langmuir isotherm model are followed for all the two cases with Q max 403.22 mg.g À1 , 106.26 mg.g À1 and the R 2 value 0.9987 and 0.9950 for MB and CR-A respectively. Evaluation of thermodynamic parameters of the adsorption indicates that the adsorption is spontaneous in nature for the two dyes.

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Synthesis of modified chitosan TiO2 and SiO2 hydrogel nanocomposites for cadmium removal

Cited by 43 publications

References 35 publications

Microfluidic‐assisted preparation of nano and microscale chitosan based 3D composite materials: Comparison with conventional methods

Microfluidic‐assisted preparation of nano and microscale chitosan based 3D composite materials: Comparison with conventional methods

Biopolymer‐Based Nanocomposites for Removal of Cr(VI) from Aqueous Systems: A Review

Sodium alginate‐cl‐poly (N,N‐dimethyl acryl amide‐co‐2‐acrylamino‐2‐methyl‐1‐propane sulphonic acid)/titanium dioxide nanocomposite hydrogel: An efficient dye‐removing agent

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