Superabsorbent hydrogel composite with minerals aimed at water sustainability

Magalhães, Antônio Sávio G.; Neto, Manuel P. Almeida; Bezerra, Maslândia N.; Feitosa, Judith P.A.

doi:10.1590/s0103-50532013000200018

Cited by 6 publications

(7 citation statements)

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“…DSC heating thermograms of polymeric hydrogel samples are shown in Figure . PU foam is flexible with the T g value of 45 °C . T g value increased to 122 °C and 113 °C on incorporation of PAM and PAM‐ co ‐NaPA, respectively due to their brittle nature in dry state but became flexible on absorption of water and biological fluids.…”

Section: Resultsmentioning

confidence: 99%

Preparation of hydrogel impregnated antimicrobial polyurethane foam for absorption of radionuclide contaminated blood and biological fluids

Kaur

Chattopadhyay

Jain

et al. 2016

J of Applied Polymer Sci

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Multi-purpose polyacrylamide (PAM) and polyacrylamide-co-sodiumpolyacrylate (PAM-co-NaPA) impregnated polyurethane foams (PUF) loaded with iodine have been prepared by in situ free radical polymerization. The prepared hydrogel networks displayed higher capacity for absorbing biological fluids as compared to regular PUF sheets and cotton matrices used in hospitals for maintaining hygiene conditions in cases of blood spillage and leakages. PAM-impregnated-PUF showed 910, 605, and 172% absorption in water, saline, and blood, respectively, whereas PAM-co-NaPA-impregnated-PUF showed absorption of 1545, 1395, and 269% in water, saline, and blood, respectively in 24 h. Exposure to nuclear, biological, and chemical (NBC) environment has become a grave predicament in today's world necessitating prevention of radiological contaminations especially in medical facilities. PAM-coNaPA-impregnated-PUF displayed 97% absorption of Tc 99 from whole blood whereas PUF sheets were highly hydrophobic and showed only 1% absorption of Tc 99 from whole blood. It was also demonstrated that modified foams have long-term broad-spectrum antimicrobial properties due to sustain release of ionic iodine. Thus, PAM-co-NaPA-impregnated-PUF sheets have strong potential to be used as matrices for carrying the injured patients, from field conditions to hospitals expose to NBC environment.

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Section: Resultsmentioning

confidence: 99%

Preparation of hydrogel impregnated antimicrobial polyurethane foam for absorption of radionuclide contaminated blood and biological fluids

Kaur

Chattopadhyay

Jain

et al. 2016

J of Applied Polymer Sci

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“…Similar results were obtained for Pam-KAc in the absence (Am/Kac = 0.96) and in the presence (Am/Kac = 1.2) of 10% of dolomite. 8 The higher value in the composite hydrogels is probably related to the lower availability of acrylate due to its complexation with Ca 2+ and/or other positively-charged functional groups at the calcite surface. 30 …”

Section: Infrared Spectroscopy Studiesmentioning

confidence: 97%

“…6,7 The addition of low-cost minerals decreases the price, enhances the mechanical properties, increases water absorption and reduces the effect of salt. [6][7][8] Many researchers have studied the incorporation of waste material and clays, such as bentonite, 6,8 nontronite, 7 dolomite, 8 laponite 9 and rice husk ash, 10 into hydrogels. In a study reported in the literature, hydrogel composites with dolomite provided an increase of 48% in the swelling equilibrium.…”

Section: Introductionmentioning

confidence: 99%

“…In a study reported in the literature, hydrogel composites with dolomite provided an increase of 48% in the swelling equilibrium. 8 The Carbonates seem to improve the properties of superabsorbent hydrogels based on poly(acrylamide-co-acrylate). Eggshell (ES) is composed mainly of calcium carbonate, and thus its addition to hydrogels should provide an increase in water absorption.…”

Section: Introductionmentioning

confidence: 99%

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Composite Superabsorbent Hydrogel of Acrylic Copolymer and Eggshell: Effect of Biofiller Addition

Queirós¹,

Bezerra²,

Feitosa³

2017

J. Braz. Chem. Soc.

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Eggshell (ES) is an abundant waste material which is mainly composed of calcium carbonate. A superabsorbent hydrogel composite based on poly(acrylamide-co-potassium acrylate) as matrix containing 17 wt.% of chicken ES powder as a filler was synthesized and compared with the gel without filler. The characterization was carried out by Fourier transform infrared (FTIR), scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM/EDX), thermogravimetric analysis (TGA), X-ray diffraction (XRD), rheological analysis and kinetics studies. The dispersion of ES in the polymeric matrix was homogeneous. The interaction between the acrylate and calcium cation was detected by FTIR analysis. The composite improved the gel strength and the absorption of water and saline solution increased by 100 and 41%, respectively. The high values for the swelling, the homogeneous structure and the good mechanical properties obtained with the incorporation of a relatively high content of a low-cost waste material indicate that this composite is suitable for application in the agriculture. In addition, this approach provides a more ecologically sound and useful destination for eggshell residue.

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“…Monovalent cations, such as Na + , can shield the carboxylate anions of the polymeric structure, contributing to compact three-dimensional structures due to the lower repulsion between fixed network charges. This leads to a decrease in the osmotic pressure difference between the polymeric network and the external solution and, consequently, a decrease in the water holding capacity (Magalhães et al, 2013;Sadeghi et al, 2011).…”

Section: Experiments To Assess the Effects Of Time And Hydration Solu...mentioning

confidence: 99%

Durability indicatives of hydrogel for agricultural and forestry use in saline conditions

Nascimento

Feitosa

Simmons

et al. 2021

Journal of Arid Environments

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Superabsorbent hydrogel composite with minerals aimed at water sustainability

Cited by 6 publications

References 0 publications

Preparation of hydrogel impregnated antimicrobial polyurethane foam for absorption of radionuclide contaminated blood and biological fluids

Preparation of hydrogel impregnated antimicrobial polyurethane foam for absorption of radionuclide contaminated blood and biological fluids

Composite Superabsorbent Hydrogel of Acrylic Copolymer and Eggshell: Effect of Biofiller Addition

Durability indicatives of hydrogel for agricultural and forestry use in saline conditions

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