Synthesis of amphoteric nanocomposite hydrogels with ultrahigh tensibility

Abstract

Amphoteric nanocomposite hydrogels (NC gels) were synthesized by in situ copolymerization of acrylic acid (AA) and N [-3(dimethylamino)propyl] methacrylamide (DMAPMA) in an aqueous dispersion of laponite XLG. Mechanical analyses demonstrated that this type of hydrogels had a combination of high tensile strength and excellent stretchability. The tensile strength was increased by 5 times up to 316 kPa when the laponite content was increased from 0.1 wt% to 20 wt%, and a maximum fracture strain of 2,317% was achieved for hydrogels containing 3 wt% laponite. Additionally, the marked improvements in strength were achieved with minimal sacrifice of the tensibility. This work provided a continuation to previous efforts of the preparation and properties of ionic NC gels. POLYM. COMPOS., 36:538-544, 2015.

Tough hybrid hydrogels based on simultaneous dual in situ sol–gel technique and radical polymerization

“…Nanocomposite hydrogels have been investigated for various potential applications due to the excellent electronic/thermal/mechanical properties when compared with their pristine polymers . The most common nanocomposite gels were prepared by in situ free‐radical polymerization of the acrylamide (AM) derivative monomers in an aqueous solution where Laponite clay nanosheets were served as multifunctional crosslinkers .…”

“…Nanocomposite hydrogels have been investigated for various potential applications due to the excellent electronic/thermal/mechanical properties when compared with their pristine polymers . The most common nanocomposite gels were prepared by in situ free‐radical polymerization of the acrylamide (AM) derivative monomers in an aqueous solution where Laponite clay nanosheets were served as multifunctional crosslinkers . In recent years, Laponite‐based nanocomposite hydrogels have received considerable attention because of their excellent mechanical properties, high transparency, large swelling ratios, and rapid responsive rates to external stimuli .…”

“…The most common nanocomposite gels were prepared by in situ free‐radical polymerization of the acrylamide (AM) derivative monomers in an aqueous solution where Laponite clay nanosheets were served as multifunctional crosslinkers . In recent years, Laponite‐based nanocomposite hydrogels have received considerable attention because of their excellent mechanical properties, high transparency, large swelling ratios, and rapid responsive rates to external stimuli . Most of these properties were attributed to their unique organic (polymer)‐inorganic (clay) network structure resulted from employing the clay platelets to act as multifunctional crosslinking agents.…”

Strengthening Network of Polyacrylic Acid/Silica Nanocomposite Hydrogels

“…Nanocomposite hydrogels have attracted much attention due to the improved mechanical properties when compared with their unmodified counterparts . Recent development on the polymer hydrogel‐particle system reveals that physical interaction between polymer and particles (i.e., clay or silica) contributes to the high mechanical stress of the final hydrogels .…”

Polystyrene‐montmorillonite core–shell particles via Pickering emulsion polymerization and their use as reinforcing additives for polypropylene and ethylene vinyl acetate

“…Furthermore, polyacrylonitrile/montmorillonite nanocomposites were synthesized through emulsion polymerization of acrylonitrile using 2‐acrylamido‐2‐methyl‐1‐propansulfonic acid, where a delaminated morphology was claimed and confirmed by TEM whereas other researchers prepared polystyrene/kaolinite nanocomposites by in situ emulsion polymerization and reported enhancement of the thermal stability with respect to the neat polystyrene. Wang and co‐workers synthesized on the other hand amphoteric nanocomposite hydrogels by in situ copolymerization of acrylic acid and N‐[3(dimethylamino)propyl]methacrylamide in aqueous dispersions of laponite and reported the strength was increased five times up to 316 kPa when the laponite content was increased from 0.1 to 20 wt%.…”