Comprehensive characterization of superabsorbent polymer hydrogels

Dubrovskii, S. A.; Afanas'eva, M. V.; Lagutina, M. A.; Kazanskii, K. S.

doi:10.1007/bf00298329

Cited by 60 publications

(37 citation statements)

References 11 publications

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“…4 Many other applications require hydrogels of exceptional mechanical properties. Examples include biomedical applications such as materials for cartilage replacement, 5 engineering applications such as swellable packers for oil and gas recovery, 6 and artificial muscles and artificial nerves in the nascent field of soft machines.…”

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Hybrid Hydrogels with Extremely High Stiffness and Toughness

et al. 2014

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The development of hydrogels for cartilage replacement and soft robotics has highlighted a challenge: load-bearing hydrogels need to be both stiff and tough. Several approaches have been reported to improve the toughness of hydrogels, but simultaneously achieving high stiffness and toughness remains difficult. Here we report that alginate-polyacrylamide hydrogels can simultaneously achieve high stiffness and toughness. We combine short-and long-chain alginates to reduce the viscosity of pregel solutions and synthesize homogeneous hydrogels of high ionic cross-link density. The resulting hydrogels can have elastic moduli of ∼1 MPa and fracture energies of ∼4 kJ m −2 . Furthermore, this approach breaks the inverse relation between stiffness and toughness: while maintaining constant elastic moduli, these hydrogels can achieve fracture energies up to ∼16 kJ m −2 . These stiff and tough hydrogels hold promise for further development as load-bearing materials.

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“…The crosslinker used in our previous work, CaSO 4 . 2H 2 O, has a low solubility (2.4 g L -1 at 20 o C).…”

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Hybrid Hydrogels with Extremely High Stiffness and Toughness

et al. 2014

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“…Dubrovskii et al (2001) describes that polymer chains are prepared by copolymerizing polyethylene oxide methacrylate bis-macromonomers with small ionogenic monomers such as 2-acrylamido-2methyl-1-propansulfonic acid, its potassium salt, and methacrylate of potasium. Hydrophilic polymer networks are capable of retaining huge volumes of water by swelling; the so-called superabsorbent hydrogels are of great interest in view of their practical uses (Dubrovskii et al 1990). Kazanskii and Dubrovskii (1992) mentioned that the superabsorbent ability of hydrophilic polymers is appropriate for practical usage, especially for the improvement of soil water retention.…”

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Cauliflower qualities in two irrigation levels with the using of hydrophilic agent

Koudela¹,

Hnilička²,

Svozilová³

et al. 2011

Hort. Sci. (Prague)

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Koudela M., Hnilička F., Svozilová L., Martinková J., 2011. Cauliflower qualities in two irrigation levels with the using of hydrophilic agent. Hort. Sci. (Prague), 38: 81-85.The aim of this work was to evaluate the influence of a hydrophilic agent (Agrisorb), added to a substrate for seedling cultivation (3 g Agrisorb/l of substrate), on the weight of roots, weight, and height of the aboveground part, the number of leaves and root collar diameter of precultivated cauliflower seedlings (cultivar Chambord F1). Seedlings were planted under two different irrigation levels: optimal with available water capacity 80%, and reduced with 50%. The influence of Agrisorb on the following characteristics of cauliflower edible parts was evaluated after harvest: weight, diameter, percentage representation of marketable parts, market yield, content of ascorbic acid, nitrates and dry matter, and total antioxidative capacity value. The addition of Agrisorb significantly increased the weight of the aboveground parts by 17.3%, the root weight by 28.1%, and the number of leaves by 7.9%. After harvest, it was noted that Agrisorb significantly increased marketable yield (by 17.5%) and decreased total antioxidative capacity (by 19.9%) in the treatment with a reduced irrigation level.

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“…Especially polymers can absorb water up to few hundred times of their own weight (5,8). These polymers are often called water super absorbents or polymer hydrogels (9,10).…”

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Water super absorbents based on copolymers of acrylamide with sodium acrylate

et al. 2000

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Water absorbing materials on the basis of acrylamide copolymers have been investigated. The cross-linking of polymer chains strongly effects the degree of water absorption. The influence of starting composition of polyacrylamide : sodium hydroxide, duration of hydrolysis and irradiation conditions on cross-linking have been determined and optimized technological parameters have been derived. Water super absorbents with the ability to absorb up to 900g water by one gram material have been prepared.

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Comprehensive characterization of superabsorbent polymer hydrogels

Cited by 60 publications

References 11 publications

Hybrid Hydrogels with Extremely High Stiffness and Toughness

Hybrid Hydrogels with Extremely High Stiffness and Toughness

Cauliflower qualities in two irrigation levels with the using of hydrophilic agent

Water super absorbents based on copolymers of acrylamide with sodium acrylate

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