Ion-specific swelling behavior of uncharged poly(acrylic acid) gel

Fabrication and Characterization of Electrospun Semiconductor Nanoparticle—Polyelectrolyte Ultra-Fine Fiber Composites for Sensing Applications

“…Moreover, the water acts as an electron pair donor upon hydration of the carboxyl groups [34]. These liberated electrons are free to diffuse to the semiconductor surface forming a layer of negative charge sufficient to pull apart the photo excited electron hole pair causing a significant reduction of the radiative decay rate [35].…”

Intrinsic and model polymer hydrogel-induced soil structural stability of a silty sand soil as affected by soil moisture dynamics

“…For hydrogel incorporated into soil, the cross-linkage between polymer chains, its spatial expansion in the porous soil matrix and the binding potential to soil particle surfaces are further influenced by the soil pH and the presence of multivalent cations such as Ca 2+ or Mg 2+ in the soil solution (Jaeger et al, 2008;Lu et al, 2002;Muta et al, 2003;Paluszek, 2011;Zhao et al, 2005). Hence, the higher amounts of cations in the soil solution than in the demineralised water might have further decreased the water mobility within the completely swollen hydrogel due to a higher cross-linkage between the polymer chains and thus an increased interaction between the water molecules and the PAA hydrogel structures.…”

Reentrant swelling behavior of poly(4-vinyl phenol) gel in aqueous organic solvent mixtures

“…In a similar way, theπ-HBH is stabilized by cations because the acceptability of water protons, or AN of water, may be enhanced via ionic hydration. These stabilization schema have been, in fact, supported by different kinds of experimental data, such as ab initio calculation for the HBH to the phenol's acidic proton [37], T 2 values of water proton from NMR measurements for the hydrogel [38], and analysis of water and hydrations of the polymer segment in gel phase by FT-IR spectroscopy [39].…”