Swelling and photoelastic behaviour of ionized hydrogels of poly(acrylic acid)

Ilavský, M.; Fähnrich, J.; Nedbal, J.; Bouchal, K.

doi:10.1007/bf00295779

Cited by 4 publications

(4 citation statements)

References 14 publications

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“…(1)(2)(3). Poly(N -isopropylacrylamide) (PNIPA) is a typical temperature-sensitive polymer (4) and its aqueous solution exhibits a lower critical solution temperature (LCST, ∼32 • C) or cloud point (CP).…”

mentioning

confidence: 99%

Synthesis of Temperature-Sensitive Poly(N-isopropylacrylamide) Hydrogel with Improved Surface Property

Zhang¹,

Zhuo²

2000

Journal of Colloid and Interface Science

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mentioning

confidence: 99%

Synthesis of Temperature-Sensitive Poly(N-isopropylacrylamide) Hydrogel with Improved Surface Property

Zhang¹,

Zhuo²

2000

Journal of Colloid and Interface Science

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“…9 gg 1 , for higher AA content it reaches over 30 gg 1 at pH 9. Such pronounced pH effects are known from studies on neat poly(AA) hydrogels [36]. It is expected that the average pK a of carboxylic groups in the studied copolymer gels is between the values for the low-molecular-weight analog, i.e.…”

Section: Photochemical Synthesis Of Neat and Sr Hydrogelsmentioning

confidence: 79%

Radiolytic synthesis of gold nanoparticles in HEMA-based hydrogels: Potentialities for imaging nanocomposites

et al. 2021

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This article reports on the radiolytic synthesis of nanocomposites containing gold nanoparticles (AuNPs) within two types of hydrogels based on 2-hydroxyethyl methacrylate (HEMA): (i) plain networks with various contents in ethylene glycol dimethacrylate (EGDMA), as a cross-linker and (ii) stimuli-responsive (SR) networks prepared from these monomers copolymerized with [2-(methacryloyloxy)ethyl]trimethylammonium chloride (MADQUAT) to confer pH-switchable swelling. Hydrogels were prepared by photopolymerization with well-defined composition and a high degree of monomer conversion using two experimental procedures, as xerogels or in aqueous solution. Besides MADQUAT, acrylic acid (AA) or N-isopropylacrylamide have been tested as copolymers, yielding pHor temperature-sensitive hydrogels, respectively. Isothermal swelling in water was affected by monomer composition. Electron beam (EB) irradiation at doses up to 100 kGy of poly(HEMA) xerogels and water-swollen networks prepared with 0.5 wt% of EGDMA had a moderate impact on swelling characteristics and thermomechanical properties of the plain materials, whereas small amounts of extractables were formed. Poly(HEMA)-based nanocomposites containing AuNPs were successfully obtained by EB irradiation of samples swollen by aqueous solutions of Au(III). The effects of dose and cross-linking density on the formation of AuNPs were monitored by UV-visible spectroscopy. Irradiation at well-defined temperatures of the Au(III)-loaded SR hydrogels induced the formation of nanoparticles with size-dependent features, whereas the efficiency of Au(III) reduction at 10 kGy was not significantly affected by the network structure. EB-induced reduction of Au(III) in poly(HEMA) hydrogels using a lead mask to generate well-defined patterns yielded coloured and long-lasting images in the zones where the nanocomposite was formed.

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“…11 Water absorption capacity and elastic properties of PAA hydrogels are dependent on the percentage of neutralization of the total concentration of acrylic acid (AA) monomer and the quantity of crosslinker during preparation. [12][13][14] Additional Supporting Information may be found in the online version of this article. Polymer gels have certain disadvantages in terms of structural, mechanical, thermal, and electrical properties.…”

Section: Introductionmentioning

confidence: 99%

Electroactive behavior assessment of poly(acrylic acid)‐graphene oxide composite hydrogel in the detection of cadmium

Bejarano-Jiménez

Escobar-Barrios

Kleijn

et al. 2014

J of Applied Polymer Sci

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Super absorbent polymers of acrylic acid-graphene oxide (PAA-GO) were synthesized with different percentage of chemical neutralization (0, 10, and 20%) of the acrylic acid monomer before its polymerization. The influence of their swelling and adsorption/desorption capacity of cadmium ions in aqueous solutions were studied and revealed that the GO enables greater mechanical stability in the materials. The PAA hydrogels, with the same degrees of neutralization, were also prepared without GO to compare with the composites. Additionally, carbon paste electrodes (CPE) modified with the composites PAA-GO were used to asses and compare their adsorption properties with cadmium(II). The anodic stripping voltammetry (ASV) peak, in the differential pulse voltammetry mode, for cadmium oxidation was found to be influenced by the presence of GO into the polymer, and also by their percentage of neutralization. The accumulation of cadmium(II) on the surface of the modified CPEs was performed under opencircuit conditions taking an account the preconcentration time of the metal cation. The presence of GO enhances the electrical signal of the electrodes in short times of immersion in cadmium(II) solutions. This property contributed to get linear responses of the CPEs modified with the composites, which were influenced by their degrees of neutralization. The PAA-GO 10N electrode with 10% of neutralization combined the influence of GO and the degree of neutralization in the same matrix, and also showed good performance in terms of its mechanical stability, it was chosen for preliminary studies on the selectivity of the electrode toward Zn(II) and Cu(II).

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Swelling and photoelastic behaviour of ionized hydrogels of poly(acrylic acid)

Cited by 4 publications

References 14 publications

Synthesis of Temperature-Sensitive Poly(N-isopropylacrylamide) Hydrogel with Improved Surface Property

Synthesis of Temperature-Sensitive Poly(N-isopropylacrylamide) Hydrogel with Improved Surface Property

Radiolytic synthesis of gold nanoparticles in HEMA-based hydrogels: Potentialities for imaging nanocomposites

Electroactive behavior assessment of poly(acrylic acid)‐graphene oxide composite hydrogel in the detection of cadmium

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