Radiation Induced Superabsorbent Hydrogels. Acrylamide/Itaconic Acid Copolymers

Karadağ, Erdener; Saraydın, Dursun; Güven, Olgun

doi:10.1002/1439-2054(20010101)286:1<34::aid-mame34>3.0.co;2-j

Cited by 99 publications

(23 citation statements)

References 36 publications

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“…Grafting and crosslinking are the common practices to modify and improve the functional properties of polysaccharides [2][3][4][5] and can be carried out by chemical initiation [6] or radiation initiation polymerization of vinyl monomers [7][8][9]. In order to prepare the hydrogels for technological important applications the network should be free from impurities.…”

Section: Introductionmentioning

confidence: 99%

Radiation crosslinked polymerization of methacrylamide and psyllium to develop antibiotic drug delivery device

Singh

Sharma

Kumar

et al. 2009

International Journal of Biological Macromolecules

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Section: Introductionmentioning

confidence: 99%

Radiation crosslinked polymerization of methacrylamide and psyllium to develop antibiotic drug delivery device

Singh

Sharma

Kumar

et al. 2009

International Journal of Biological Macromolecules

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“…3 Comparison between the theoretically simulating results by the MECis model and experimental data for the A1 series of PAAP hydrogels (Dhara et al 1999) In Eq. 55, M C is the average molecular weight of the polymer before cross linking, and M r the molecular weight of the repeating unit which is calculated by (Karadag et al 2001)…”

Section: Comparison Of Simulation Results With Experimental Datamentioning

confidence: 99%

Multiphysics modeling of responsive characteristics of ionic-strength-sensitive hydrogel

Lai

2010

Biomed Microdevices

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A multiphysics model is developed in this paper for simulation of the volume transition mechanism of the smart hydrogel in response to the changes in the ionic strength of bathing solution as an important measure of the ionic concentration of that solution, which is termed the multi-effect-coupling ionic-strength-stimulus (MECis) model. In the present works, the ionic strength is treated as a main stimulus and incorporated into both the ionic convection-diffusion system in the Nernst-Planck flux and the fixed charge density equation characterized by Langmuir isotherm theory. Due to the diffusion and convection, the osmotic pressure is produced by the difference in the ionic concentration between the interior hydrogel and exterior solution, which drives the swelling of the smart hydrogel. The deformation of the ionic-strength-sensitive hydrogel is described by the momentum conservation law, in which the osmotic pressure is a main driving source. Apart from osmotic pressure, however, the repulsive force between the fixed charges is also considered in the mechanical equilibrium equation as another driving source for the swelling of the hydrogel. The simulation is conducted for one-dimensional steady-state problem, and then compared with the experimental data and other theories from open literature. The comparisons demonstrate that the MECis model can simulate well the swelling behavior of the ionic-strength-sensitive hydrogel qualitatively and quantitatively. Probably it is able to predict the responsive characteristics of the bathing solution including the distribution of diffusive ionic concentrations and electrical potential.

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“…It shows the values of %S of hydrogels vary between 1209-4955%. It is well known that the swelling of hydrogel is induced by the electrostatic repulsion of the ionic charges of the network (24,25). DAPB is cationic in nature, so as the concentration of DAPB in hydrogel increase, the cationic content in the hydrogel increases and as a result increase in the equilibrium swelling is observed.…”

Section: Swelling Studiesmentioning

confidence: 99%

Novel Cationic Poly[AAm/NVP/DAPB] Hydrogels for Removal of Some Textile Anionic Dyes from Aqueous Solution

Patel

2012

Journal of Macromolecular Science, Part A

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Novel cationic poly [AAm/NVP/DAPB] hydrogels (YH 1 -YH 5 ) were synthesized by free radical solution polymerization of AAm, NVP and DAPB by increasing the concentration of DAPB in the feed. According to swelling experiments, hydrogel YH 5 with higher DAPB content gave relative higher swelling percentage compared to other hydrogels. The hydrogel YH 5 was characterized by FTIR, TGA and SEM analysis. The anionic dye solution such as Orange-II, Reactive Golden Yellow and Acid Yellow were used as an adsorption medium to investigate the usability of the hydrogel for the removal of anionic dyes. The effect of pH of the adsorption medium, initial concentration of the dye, adsorbent dose, %swelling and contact time was also investigated. Furthermore, the Langmuir and Freundlich adsorption isotherms were applied and they showed a good fit to the experimental data. From the results, the uptake of dyes within the hydrogel increased in the following order: Reactive Golden Yellow>Orange-II>Acid Yellow.

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Radiation Induced Superabsorbent Hydrogels. Acrylamide/Itaconic Acid Copolymers

Cited by 99 publications

References 36 publications

Radiation crosslinked polymerization of methacrylamide and psyllium to develop antibiotic drug delivery device

Radiation crosslinked polymerization of methacrylamide and psyllium to develop antibiotic drug delivery device

Multiphysics modeling of responsive characteristics of ionic-strength-sensitive hydrogel

Novel Cationic Poly[AAm/NVP/DAPB] Hydrogels for Removal of Some Textile Anionic Dyes from Aqueous Solution

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