Multi-responsive nanocomposite hydrogels with high strength and toughness

Abstract

Poly(NIPAM-co-DAC) hydrogels containing thermoresponsive units and positive charges show high mechanical properties and responsiveness to temperature, pH, and ion strength.

Nanoclay Reinforced Self‐Cross‐Linking Poly(N‐Hydroxyethyl Acrylamide) Hydrogels with Integrated High Performances

“…Incorporation of inorganic nanoparticles into hydrogels can strongly affect the mechanical properties due to polymer–nanoparticle interactions. Laponite, a synthetic hectorite‐type clay, is one of the most commonly used inorganic fillers in hydrogels . Laponite nanoplatelets, acting as physical cross‐linkers and reinforcing fillers, can interact with polymer chains, and the dissociation of polymer–nanoparticle interactions can dissipate a large amount of energy and delay complete fracture of hydrogels .…”

A Copper Metal–Organic Hydrogel as a Catalyst for SO2 and CO2 Fixation under Ambient Conditions

“…In recent years, metal–organic gels (MOGs) have attracted a great deal of attention due to their potential application in sensing, molecular recognition, catalysis, drug delivery, and dye adsorption, Low molecular weight MOGs are formed due to various non‐covalent interactions which are responsible for the rapid self‐assembly process of the discrete metal complexes and formation of the microstructures where a significant amount of solvent molecules are entrapped inside the network. These weak non‐covalent interactions, as well as the microstructure, can be easily deformed through the external stimuli, and material can undergo the gel to sol transition or vice‐versa. The easy synthetic procedure and heterogeneous nature, of the MOGs attracted the researchers' attention in the field of catalysis.…”

Multi-Stimuli-Responsive Polymer Particles, Films, and Hydrogels for Drug Delivery

“…Fu and coworkers further developed two-stimuli hydrogels to three-stimuli (i.e., pH, ion, and temperature) responsive hydrogels via in situ copolymerization of NIPAM (temperature-responsive units) and acryloyloxyethyltrimethyl ammonium chloride (DAC) (pH-and ionic-responsive units). 83 The temperature responsiveness of the gels was tuned by varying the NIPAM/DAC molar ratio. An increase in DAC content or a decrease in NIPAM content enhanced the hydrophilicity of the gels, resulting in a shift of the LCST to a higher temperature (in a range of 32 C-41 C); as a result, a higher temperature was needed to deswell the gels.…”