Surface Chemical Studies on the Competitive Adsorption of Poly(acrylic acid) and Poly(vinyl alcohol) onto Alumina

Adsorption of a Low-Molecular-Weight Polyacrylic Acid on Silica, Alumina, and Kaolin

“…The adsorption rises steeply at low polymer concentrations indicating a high-affinity type adsorption. Figure 2 represents the adsorption density of PAA as a function of equilibrium concentration of the polymer in supernatant on the surface of alumina particles at pH 7 and, as can be observed, a plateau was reached at approximately 0.70 mg m surface coverage, which is in good agreement with the results of earlier investigators (e.g., 8,9). The adsorption density of PAA on the surface of silica particles at pH 7 was not significant indicating that no adsorption of PAA occurs on the face of kaolin particles.…”

Optimization of Alumina Slurry for Oxide-Oxide Ceramic Composites Manufactured by Injection Molding

“…These groups have great influence on the adsorption properties of PVA, providing a chemical conformation of the polymer with a structure with more loops and tails adsorbed better to the surface of the alumina particle [30]. Acetate groups are also sensitive to pH with the level of interactions increasing with pH [29,31]. Wiśniewska et al [29] have demonstrated that there is a stability pH range between 3 and 6 for alumina suspension and that beyond the PVA is more stretched and thus the adsorption of the polymer chain is on few particles, causing bridging flocculation of suspension.…”

Synthesis and optical properties of monodispersed Ni2+-doped ZnS nanoparticles

“…4a indicates hydrogen bond formed in the ZnS:Ni 2? /PEG interface (Santhiya et al 1999). The spectrum of CTAB is presented in Fig.…”