Synthesis and swelling characteristics of semi-interpenetrating polymer network hydrogels composed of poly(acrylamide) and poly(γ-glutamic acid)

Rodriguez, D.; Romero‐García, Jorge; Ramı́rez-Vargas, E.; Ledezma‐Pérez, Antonio; Arias, Eduardo

doi:10.1016/j.matlet.2005.11.033

Cited by 38 publications

(19 citation statements)

References 23 publications

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“…This trend is attributed to the increase in the hydrogel hydrophilicity (thus the increase in water absorption capacity) due to the incorporation of hydroxyl and carboxylic groups from the CMC segments. This tendency was also observed in the PAM/poly (c-glutamic acid) hydrogels studied by Rodriguez et al; in 2006 [19] The swelling ratio of the CMC/ PAM (90/10) composition with varying contents of Si, as a function of swelling time, is shown in Fig. 2.…”

Section: Resultssupporting

confidence: 70%

Radiation synthesis and characterization of super absorbent hydrogels for controlled release of some agrochemicals

Maziad

Fadl

El-Kelesh

et al. 2015

J Radioanal Nucl Chem

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Superabsorbent copolymers of carboxymethyl cellulose/polyacrylamide (CMC/PAM) and carboxymethyl celullose/polyacrylamide/silica (CMC/PAM/Si) were synthesized using a c-irradiation technique. The effects of irradiation dose, content of CMC, AM, and Si on swelling percentage of the produced hydrogels were evaluated. It was found that the maximum swelling percent increased dramatically up to 12,000 % at pH 12 with increasing content of silica up to 5 % in the CMC/PAM/Si composite hydrogel. The prepared copolymers were characterized by FTIR, and SEM techniques. In order to evaluate their controlled release potentials, different hydrogels were loaded with potassium nitrate (KNO 3 ), and the release of the KNO 3 was studied and evaluated at various pH values.

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Section: Resultssupporting

confidence: 70%

Radiation synthesis and characterization of super absorbent hydrogels for controlled release of some agrochemicals

Maziad

Fadl

El-Kelesh

et al. 2015

J Radioanal Nucl Chem

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“…This trend is attributed to the increase in the hydrogel hydrophilicity (thus the increase in water absorption capacity) due to the incorporation of hydroxyl groups from MC segments. This tendency was also observed in the PAAm/poly(γ-glutamic acid) hydrogels studied by Rodríguez et al, 2006. …”

Section: Some Physical-chemistry Properties Of Paam-mc Hydrogels 32supporting

confidence: 64%

Biodegradable Hydrogel as Delivery Vehicle for the Controlled Release of Pesticide

Aouada¹,

Moura²,

Mattoso³

2011

Pesticides - Formulations, Effects, Fate

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“…It is well known that hydrogels with a suitable hydrophilic–hydrophobic balance may exhibit thermosensitivity 32. Hydrogel systems having the association/dissociation characteristics of the hydrogen bonding between polar groups within semi‐IPNs or IPNs also show a temperature‐responsive swelling behavior 33. In most cases, PAM itself is generally believed not to exhibit temperature sensitivities.…”

Section: Resultsmentioning

confidence: 99%

Synthesis, characterization, and swelling kinetics of pH‐responsive and temperature‐responsive carboxymethyl chitosan/polyacrylamide hydrogels

Wei

Luo

Feng

et al. 2012

J of Applied Polymer Sci

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A novel pH‐ and temperature‐responsive hydrogel composed of carboxymethyl chitosan (CMC) and polyacrylamide (PAM) semi‐interpenetrating polymer networks (semi‐IPNs) was synthesized by a crosslinking copolymerization route in the presence of N,N‐methylene bisacrylamide and potassium persulfate. The structure of the CMC/PAM hydrogels was characterized by Fourier transform infrared spectroscopy, and the morphologies were observed by scanning electron microscopy. The swelling kinetics investigations demonstrated that the equilibrium swelling ratios (ESRs) of the semi‐IPN hydrogels depended on the compositional ratios, pH values of the buffer solutions, and temperature. The ESR values increased with increasing CMC contents and pH values; this was in agreement with the maximum theoretical water contents fitted by the swelling kinetic data. The CMC/PAM hydrogels complied with Fickian behavior at pH 1.4 and non‐Fickian behavior at pH 11.7 in the buffer solutions. These hydrogels displayed thermosensitivities that were different from those of common thermoresponsive gels. The swelling was enhanced when the temperature of the media was increased up to 40°C; this was followed by a reduction. Therefore, the swelling behavior of the CMC/PAM hydrogels could be controlled and modulated by means of the compositional ratios of CMC to acrylamide, pH values of the buffer solutions, and temperature. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013

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Synthesis and swelling characteristics of semi-interpenetrating polymer network hydrogels composed of poly(acrylamide) and poly(γ-glutamic acid)

Cited by 38 publications

References 23 publications

Radiation synthesis and characterization of super absorbent hydrogels for controlled release of some agrochemicals

Radiation synthesis and characterization of super absorbent hydrogels for controlled release of some agrochemicals

Biodegradable Hydrogel as Delivery Vehicle for the Controlled Release of Pesticide

Synthesis, characterization, and swelling kinetics of pH‐responsive and temperature‐responsive carboxymethyl chitosan/polyacrylamide hydrogels

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