Adsorption Characteristics of Poly(acrylic acid) and Poly(vinyl pyrrolidone) on Alumina from Their Mixtures in Aqueous Solution

✍ Scribed by Kenji Ishiduki; Kunio Esumi

• Publisher: Elsevier Science
• Year: 1997
• Tongue: English
• Weight: 96 KB
• Volume: 185
• Category: Article
• ISSN: 0021-9797
• DOI: 10.1006/jcis.1996.4602

✦ Synopsis

flocculation of alumina using a combination of polymers Adsorption behavior of poly(acrylic acid) (PAA) and poly(vinyl whose conformation is considerably altered with pH. We pyrrolidone) (PVP) on alumina from their binary mixtures in aquehave also studied (6) the competitive adsorption of poly ous solution at pH 5.2 has been studied by measuring the adsorbed (vinyl pyrrolidone) (PVP) and poly(dimethyldiallyl ammoamount of polymers, dispersion stability, and ESR spectra. The nium chloride) (PDC) on silica and found that the conformaadsorption of PAA alone shows a strong affinity with a large tion of PVP is relatively flat at low PDC concentration but adsorbed amount for alumina surface, but that of PVP alone is is extended with increasing PDC concentration. There are, very weak and small. In fixed initial concentrations of PAA the however, a few studies for adsorption of dual polymers on adsorption of PVP is considerably enhanced, probably due to the particles.

interaction of PVP with PAA adsorbed on alumina through hydrogen bonding. From ESR spectra of spin-labeled PAA and adsorbed

In this work, adsorption of PVP and poly(acrylic acid) PVP, it is found that in the co-adsorption of PAA and PVP, ad-(PAA) on alumina has been investigated using several techsorbed PAA takes predominantly trains, while PVP is mainly adniques. In particular, the conformation of adsorbed PVP and sorbed in loops or tails. The stability of alumina dispersion has PAA has been evaluated using the corresponding spin-laalso been discussed from the conformation of polymers adsorbed beled polymers with ESR.