Novel optical amorphous phosphate materials with a low melting temperature

Kaser, Simon; Guerineau, Théo; Strutynski, Clément; Zaki, Reda Mohammed; Dussauze, Marc; Durand, Etienne; Messaddeq, Sandra Helena; Messaddeq, Younès; Cardinal, Thierry

doi:10.1039/d1ma00995h

Cited by 2 publications

(1 citation statement)

References 38 publications

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“…It was reported earlier that phosphate-based glasses can be obtained at relatively low temperatures . In line with this fact, the PXRD analysis of both polyP(103) and polyP(151) glasses shows the characteristic broad band of the materials in the 2θ range of 15°–30° (Figure S2 in Supporting Information).…”

Section: Resultssupporting

confidence: 82%

The Impact of Polyphosphates on the Colloidal Stability of Laponite Particles

Katana,

Baptista,

Schneider

et al. 2024

J. Phys. Chem. B

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The effect of polyphosphate (polyP) adsorption on the colloidal properties of disc-shaped laponite (LRD) particles was examined in aqueous dispersions with a focus on elucidating the interparticle forces that govern the colloidal stability of the systems. The charge and aggregation rate data of bare LRD exhibited an ionic strength-dependent trend, confirming the presence of double-layer repulsion and van der Waals attraction as major surface interactions. The charge of LRD particles significantly increased in magnitude at elevated polyP concentrations as a result of polyP adsorption and subsequent overcharging of the positively charged sites on the edges of the LRD discs. A transition from stable to unstable LRD colloids was observed with increasing polyP doses indicating the formation of aggregates in the latter systems due to depletion forces and/or bridging interactions induced by dissolved or adsorbed polyP, respectively. The degree of phosphate polymerization influenced neither the charge nor the aggregation mechanism. The findings clearly confirm that polyP adsorption was the driving phenomenon to induce particle aggregation in contrast to other clay types, where phosphate derivatives act as dispersion stabilizing agents. This study provides valuable insights into the early stages of aggregation in colloidal systems involving LRD and polyPs, which have a crucial role in predicting further material properties that are important to designing LRD-polyP composites for applications such as potential phosphate sources in chemical fertilizers.

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Section: Resultssupporting

confidence: 82%