Investigation of the influence of the polyvinyl alcohol adsorption on the electrical properties of Al2O3–solution interface, thickness of the adsorption layers of PVA

Chibowski, S.; Paszkiewicz, Małgorzata; Krupa, Maciej

doi:10.1016/s0032-5910(99)00194-1

Cited by 58 publications

(29 citation statements)

References 14 publications

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“…It is associated with the presence of 2.5% unhydrolyzed acetate groups -OCOCH 3 in the PVA chains (hydrolysis degree 97.5%). Our previous investigations [19] indicate that these groups show the preferential adsorption on the alumina surface in comparison to that of hydroxyl groups -OH. Possible types of hydrogen bridge interactions between the surface groups -Al 2 O 3 and the functional groups of PVA are placed in Table 1.…”

Section: Resultsmentioning

confidence: 87%

Investigation of the alumina properties with adsorbed polyvinyl alcohol

Wiśniewska

Chibowski

Urban

et al. 2010

J Therm Anal Calorim

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The influence of solution pH on the structure of polyvinyl alcohol adsorption layer on the alumina surface was investigated. The spectrophotometry, viscosimetry, thermogravimetry, potentiometric titration and microelectrophoresis were applied in experiments. These methods enable determination of the following parameters: adsorbed amount of PVA, stability of suspension without and with polymer, thickness of its adsorption layers, changes in thermal characteristics of Al 2 O 3 surface with the adsorbed polymer, surface charge density and zeta potential of solid particles in the presence and absence of PVA, respectively. All measurements were carried out in the pH range 3-9. The obtained results indicate that pH has a great influence on the conformation of PVA chains adsorbed on the alumina surface. It is due to incomplete hydrolysis of acetate groups of polyvinyl alcohol macromolecules (degree of hydrolysis 97.5%), which dissociate with the increasing pH. Moreover, the polymer adsorption on the alumina surface causes changes in the course of thermogravimetric curves. The effect of weight loss for Al 2 O 3 -PVA systems is smaller than that of Al 2 O 3 without polymer. It is due to elimination of water molecules from the solid surface by adsorbed polymer.

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Section: Resultsmentioning

confidence: 87%

Investigation of the alumina properties with adsorbed polyvinyl alcohol

Wiśniewska

Chibowski

Urban

et al. 2010

J Therm Anal Calorim

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“…Even such a relatively small part of these groups affects the structure of the PVA adsorption layer. Our previous study indicated that the acetate groups play an essential role in the PVA adsorption-the increase of the number of these groups in the polymeric chains led to higher adsorption levels (Chibowski et al 2000). Contribution of charged acetate groups rises as the solution pH increases.…”

Section: Resultsmentioning

confidence: 98%

Impact of poly(vinyl alcohol) adsorption on the surface characteristics of mixed oxide Mn x O y –SiO2

et al. 2015

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The poly(vinyl alcohol) (PVA) influence on the adsorption and electrokinetic properties of the mixed oxide Mn x O y -SiO 2 /polymer solution system was examined. Three oxides differing with the Mn x O y contents were applied (0.2; 1 and 3 mmol/g SiO 2 , respectively). The PVA with the molecular weight 100 kDa was characterized with the acetate groups content equal to 14 %. Adsorption, solid surface charge and zeta potential measurements were made as a function of solution pH (3-10). The obtained results showed that the PVA adsorption amount strongly depends on not only the solution pH, but also manganese oxide content on the mixed oxide surface. The higher solution pH value (or Mn x O y content) is, the higher polymer adsorption is obtained. The PVA addition to the solid suspension causes minimal changes of the mixed oxide surface charge density, whereas the zeta potential of solid particles increases significantly in the polymer presence.

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“…However, in the case of partially hydrolyzed PVA, which is the PVA used in this study, the adsorption on the alumina particle surface might be preferential for the acetate groups -OCOCH 3 rather than the hydroxyl groups [29,30]. 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].…”

Section: 2mentioning

confidence: 94%

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

Billotte

Fotsing

Ruiz

2017

Advances in Materials Science and Engineering

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This paper focuses on the rheological study of an alumina suspension intended for the manufacturing of oxide-oxide composites by flexible injection. Given the production constraints, it is required to have stable suspension with low viscosity and a Newtonian behavior. This is achieved with a concentration of nitric acid between 0.08 wt% and 0.2 wt% and amount of 3 wt% of PVA binder. The maximum loading of the suspension of 47 vol% suggests that there is no structure development within the suspension with optimized concentration of acid and PVA.

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Investigation of the influence of the polyvinyl alcohol adsorption on the electrical properties of Al2O3–solution interface, thickness of the adsorption layers of PVA

Cited by 58 publications

References 14 publications

Investigation of the alumina properties with adsorbed polyvinyl alcohol

Investigation of the alumina properties with adsorbed polyvinyl alcohol

Impact of poly(vinyl alcohol) adsorption on the surface characteristics of mixed oxide Mn x O y –SiO2

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

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