Swelling kinetics and rheological behaviour of microwave synthesized poly(acrylamide-co-acrylic acid) hydrogels

Erceg, Tamara; Dapčević‐Hadnađev, Tamara; Hadnađev, Miroslav; Ristić, Ivan

doi:10.1007/s00396-020-04763-9

Cited by 29 publications

(14 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The swelling kinetics of the different crosslinked nanofiber mats were calculated by using the equilibrium swelling ratio (

) and the dynamic swelling ratio (W t ) according to the Formulas (3) and (4), respectively [ 31 , 32 , 33 , 34 , 35 , 36 ].

where M 0 is the original weight of each mat sample in the dry state, M t is the wet weight of each sample when the time is t, and

is the wet weight of each sample in the swelling equilibrium status.…”

Section: Materials and Experimental Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Electrospun Methacrylated Gelatin/Poly(L-Lactic Acid) Nanofibrous Hydrogel Scaffolds for Potential Wound Dressing Application

et al. 2021

View full text Add to dashboard Cite

Electrospun nanofiber mats have attracted intense attention as advanced wound dressing materials. The objective of this study was to fabricate methacrylated gelatin (MeGel)/poly(L-lactic acid) (PLLA) hybrid nanofiber mats with an extracellular matrix (ECM) mimicking nanofibrous structure and hydrogel-like properties for potential use as wound dressing materials. MeGel was first synthesized via the methacryloyl substitution of gelatin (Gel), a series of MeGel and PLLA blends with various mass ratios were electrospun into nanofiber mats, and a UV crosslinking process was subsequently utilized to stabilize the MeGel components in the nanofibers. All the as-crosslinked nanofiber mats exhibited smooth and bead-free fiber morphologies. The MeGel-containing and crosslinked nanofiber mats presented significantly improved hydrophilic properties (water contact angle = 0°; 100% wettability) compared to the pure PLLA nanofiber mats (~127°). The swelling ratio of crosslinked nanofiber mats notably increased with the increase of MeGel (143.6 ± 7.4% for PLLA mats vs. 875.0 ± 17.1% for crosslinked 1:1 MeGel/PLLA mats vs. 1135.2 ± 16.0% for crosslinked MeGel mats). The UV crosslinking process was demonstrated to significantly improve the structural stability and mechanical properties of MeGel/PLLA nanofiber mats. The Young’s modulus and ultimate strength of the crosslinked nanofiber mats were demonstrated to obviously decrease when more MeGel was introduced in both dry and wet conditions. The biological tests showed that all the crosslinked nanofiber mats presented great biocompatibility, but the crosslinked nanofiber mats with more MeGel were able to notably promote the attachment, growth, and proliferation of human dermal fibroblasts. Overall, this study demonstrates that our MeGel/PLLA blend nanofiber mats are attractive candidates for wound dressing material research and application.

show abstract

“…The swelling kinetics of the different crosslinked nanofiber mats were calculated by using the equilibrium swelling ratio (

) and the dynamic swelling ratio (W t ) according to the Formulas (3) and (4), respectively [ 31 , 32 , 33 , 34 , 35 , 36 ].

where M 0 is the original weight of each mat sample in the dry state, M t is the wet weight of each sample when the time is t, and

is the wet weight of each sample in the swelling equilibrium status.…”

Section: Materials and Experimental Methodsmentioning

confidence: 99%

“…The swelling kinetics of the different crosslinked nanofiber mats were calculated by using the equilibrium swelling ratio (W ∞ ) and the dynamic swelling ratio (W t ) according to the Formulas (3) and ( 4), respectively [31][32][33][34][35][36].…”

Section: Materials Characterizationsmentioning

confidence: 99%

Electrospun Methacrylated Gelatin/Poly(L-Lactic Acid) Nanofibrous Hydrogel Scaffolds for Potential Wound Dressing Application

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Basically, the extent of water absorbency related directly to the cross-link density which controls the expansion of polymer network to enable penetration of water molecules [18]. Electrostatic interactions between the amino cations originated from AM and the carboxylate anions formed a rather rigid network structure that prohibited the expansion of polymer networks [19]. In addition, the water absorbency of both SAPs is in the same range of commercial SAPs that has been used in agricultural applications [20].…”

Section: Structure and Property Of The Synthesized Sap Polymersmentioning

confidence: 99%

Degradation of Acrylic Acid/acrylamide Superabsorbent Copolymer

Bankeeree

Samathayanon

Prasongsuk

et al. 2021

Preprint

View full text Add to dashboard Cite

Poly(potassium acrylate), P(KA), and poly[acrylamide-co-(potassium acrylate)], P(Am-co-KA), were synthesized and an effective degradation technique of the polymers via chemical and biological processes were pursued. Significant reductions in dry mass and water absorbency were observed after P(KA) (53% and 54%, respectively) and P(Am-co-KA) (43% and 40%, respectively) were buried in the soil for ten weeks. The living fungal culture failed to degrade the polymers, but the enzymatic treatment using crude peroxidase (20 U/g) for 16 h significantly decreased the dry mass (15%; 15.0±0.3 g) and water absorbency (13%; 16.0±1.0 g/g) of P(KA). Chemical oxidation using H2O2 at high temperature with/without peroxidase efficiently degraded P(KA) and P(Am-co-KA). The maximum degradation of P(KA) (99.84% weight loss) was obtained when incubated with 12.8% (v/w) H2O2 at 65 ºC for 7.3 h while 98.43% weight loss was achieved after P(Am-co-KA) was incubated with 14.8% (v/w) H2O2 at 68 ºC for 9.2 h. No significant inhibition was observed in seed germination of mung bean grown on the untreated polymers but sweet corn was slightly inhibited. The effects of degraded products on mung bean germination were not significantly different from the control and untreated polymers. On sweet corn, the degraded products were apparently less toxic than did the untreated polymers. These results suggested that the rapid and efficient degradation of polyacrylate and its copolymer by the thermo-oxidation of H2O2 could be applied for a larger scale of SAP waste management.

show abstract

“…The main property of hydrogels is swellingthe ability to absorb the water and increase their volume [3]. Hydrogel swelling behavior depends on polymer chemical structure (the type and amount of hydrophilic groups), polymer-water interaction, crosslinking density, hydrogel porosity, and environmental conditions [4,5]. The presence of hydrophilic groups in hydrogel structure such as hydroxyl (-OH), amide (-CONH-R, -CONH2), and ionizing groups such as amine (-NH2) and carboxylic (-COOH) enable the swelling of hydrogel.…”

Section: Introductionmentioning

confidence: 99%

“…The presence of hydrophilic groups in hydrogel structure such as hydroxyl (-OH), amide (-CONH-R, -CONH2), and ionizing groups such as amine (-NH2) and carboxylic (-COOH) enable the swelling of hydrogel. The ability of hydrogels to respond to changes in pH and ionic strength in the surrounding medium by changing their absorption properties and volume is based on the ionization of present functional groups [5]. Due to their specific, tailored-made properties such as absorption, the possibility to respond to external stimuli, flexibility in a swollen state similar to natural tissue, hydrogels have received significant attention in the last decades.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Chitosan-Acrylic Acid Based Hydrogels and Investigation the Properties of Bilayered Design With Incorporated Alginate Beads

Erceg

Brakus

Stupar

et al. 2022

Preprint

Self Cite

View full text Add to dashboard Cite

The paper presents the synthesis of hydrogels via free-radical polymerization, based on Chitosan (CS) grafted with Acrylic acid (AA), using a two-step procedure. Free-radical polymerization has given strong hydrogels with compact structure, dominant elastic behavior and long linear viscoelastic region. The results of rheological studies have shown that obtained hydrogels have significantly improved mechanical properties in comparison to chitosan hydrogels obtained by other sustainable methods. A step forward in the investigation of the potential application of chitosan hydrogels in wound dressing systems has been made by preparation of the bilayer design by embedding a layer of active compound-loaded alginate beads into the contact surface between two conjoined units of CS/AA hydrogels. Wild garlic (Allium ursinum L.) dried extract was used as an active compound because of its antimicrobial activity and green properties. This system has demonstrated pH-dependent release of extract and higher shear elastic modulus values than ordinary disc gels. A conducted study has given preliminary results for the possible application of bilayer chitosan - based hydrogels in wound dressing systems and represents the first step towards extrapolating the proposed design across other application fields.

show abstract

Swelling kinetics and rheological behaviour of microwave synthesized poly(acrylamide-co-acrylic acid) hydrogels

Cited by 29 publications

References 39 publications

Electrospun Methacrylated Gelatin/Poly(L-Lactic Acid) Nanofibrous Hydrogel Scaffolds for Potential Wound Dressing Application

Electrospun Methacrylated Gelatin/Poly(L-Lactic Acid) Nanofibrous Hydrogel Scaffolds for Potential Wound Dressing Application

Degradation of Acrylic Acid/acrylamide Superabsorbent Copolymer

Synthesis and Characterization of Chitosan-Acrylic Acid Based Hydrogels and Investigation the Properties of Bilayered Design With Incorporated Alginate Beads

Contact Info

Product

Resources

About