The adsorption of fluoride containing polyelectrolytes on hydroxyapatite

Bartels, T.; Arends, J

doi:10.1002/pol.1981.170190113

Cited by 8 publications

(7 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Any additional adsorption will ren der the potential positive and the calcium ions in the Stern layer are exchanged by pyridinium groups. The reversible character of this exchange mechanism was clearly demonstrated in previous desorption experi ments [Bartels and Arends, 1981]. PEF and PEHF, although irreversibly adsorbed in water, were found to desorb from HAP in CaCh solutions.…”

Section: Zeta Potentials and Polymer Adsorptionmentioning

confidence: 66%

Surface Characteristics of Hydroxyapatite and Enamel after Adsorption of Fluoride-Containing Macromolecules

Bartels¹,

Pelt²,

Jong³

et al. 1982

Caries Res

Self Cite

View full text Add to dashboard Cite

In this study the adsorption of two fluoride-containing polyelectrolytes with different hydrophobic properties on hydroxyapatite is investigated. It was found that the adsorption of the macromolecule was accompanied by the uptake of fluoride, but at a higher rate and with higher amounts than the polymer itself. The influence of the polyelectrolytes on the surface properties of hydroxyapatite and whole enamel was investigated by zeta potential determinations and contact angle measurements, respectively. It was observed that adsorption of very minor amounts of these macromolecules had a remarkable effect on the zeta potential of hydroxyapatite. The original zeta potential of ––9 mV was increased to relatively high positive values. Furthermore, adsorption of the most hydrophobic polymer on the enamel resulted in a poor wettability of the surface by water. Contact angles around 90° were observed, indicating the hydrophobic character of the treated surface.

show abstract

Section: Zeta Potentials and Polymer Adsorptionmentioning

confidence: 66%

Surface Characteristics of Hydroxyapatite and Enamel after Adsorption of Fluoride-Containing Macromolecules

Bartels¹,

Pelt²,

Jong³

et al. 1982

Caries Res

Self Cite

View full text Add to dashboard Cite

show abstract

“…This might be ex plained by a lower amount of adsorbed PEHF polymer as compared to PEF, which was shown to occur on the hydroxyapatite interface [Bartels and Arends, 1981], Also the rather compact conformation of the hy drophobic polymer on the enamel surface due to strong hydrophobic interaction of the hexadecyl groups may result in a decreased diffusion of ionic species (e.g. F~ and phos phate) in and out the enamel surface result ing in retardation of CaF2 and fluoridated hydroxyapatite formation.…”

Section: Discussionmentioning

confidence: 99%

“…In previously published experiments it was found that polyamine fluorides have a great affinity for hydroxyapatite surfaces; during adsorption of the macromolecule, fluoride was taken up simultaneously [Bar tels and Arends, 1981], In addition, po lyamine fluorides are known to affect essen tial surface properties of hydorxyapatite and enamel such as surface charge and wettabili ty ,…”

mentioning

confidence: 99%

Fluoridation of Human Enamel by Fluoride-Containing Polyelectrolytes

Bartels¹,

Hu²,

Arends³

1982

Caries Res

Self Cite

View full text Add to dashboard Cite

The fluoride uptake from two polyamine fluorides by human enamel was studied as a function of treatment time, concentration and pH of the polyelectrolytes. The two polyamine fluorides were hydrophilic and hydrophobic in character, respectively. The fluoride concentration at various distances from the anatomical surface of enamel was measured by an acid etch technique using dilute 0.02 and 0.1 M perchloric acid solutions. Fluoride contents up to 45,000 ppm were observed at the outermost enamel layer. Increasing fluoride contents were observed at relative low pH values and longer treatment time. The hydrophilic polyamine fluoride deposited more fluoride as compared to the hydrophobic polymer. The influence of the polymer concentration on the fluoride content of enamel was not significant. The fluoride-containing polyelectrolytes investigated have a pronounced effect on the acid solubility of human enamel as compared to APF topical solutions. Reduction in acid solubility of about 30% was observed in solutions with pH values of about 1.

show abstract

“…We concluded that fluorine-containing compounds could be efficiently degraded in the Fe 3 O 4 @ALG/Fe-H 2 O 2 system. Sefton et al [29] and Bartels et al [30] reported that the F moiety in the molecule of amine fluorides and fluorine containing polyelectrolytes contributed to their adsorption on hydroxyapatite via association with Ca 2+ cations or ion exchange with phosphate. Fluoride also can firmly bond Fe 3+ or Fe 2+ cations [31], we supposed that the fluorine element in NOF molecule still had the trends to associate with Fe ions although NOF exhibited low adsorption ability to Fe 3 O 4 @ALG/Fe, which could draw NOF to the surface of catalyst.…”

Section: Plausible Mechanismmentioning

confidence: 98%