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M.A. Massucci

Bio: M.A. Massucci is an academic researcher. The author has contributed to research in topics: Zirconium phosphate & Ion exchange. The author has an hindex of 5, co-authored 6 publications receiving 174 citations.

Papers
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Journal ArticleDOI
TL;DR: In this article, a general discussion of the Cs+ or Rb+-ion exchange behavior on zirconium phosphate at various degree of crystallinity is made, and it is concluded that the low, apparent selectivity of crystalline zircanium phosphate towards large monovalent ions is due to steric hindrance and therefore enlarged phases of this exchanger, such as Zr(HPO4)2.8H2O (10·4 A), are expected to have a high selectivity towards Cs+, or even larger cations.

81 citations

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TL;DR: In this paper, the HLi and HCa ion exchanges have been studied with crystalline zirconium phosphate prepared either by a refluxing procedure [ZP (r.)] or by direct precipitation [Zp (d.p.).

40 citations

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TL;DR: In this paper, the composition and the solid phase percentages at the various stages of exchange were investigated to study the large hysteresis loop found for the Li/K system.

23 citations

Journal ArticleDOI
TL;DR: In this paper, the forward and reverse NaK ion exchange isotherms were investigated by determining the water contents and X-ray diffraction patterns of the samples at various degrees of exchange.

23 citations


Cited by
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Journal ArticleDOI
TL;DR: In this paper, the α-Zirconium phosphate (α-ZrP) layer structures have been prepared via three different approaches, by controlling the concentration of reactants, temperature, pressure, and using a complexing agent.
Abstract: Synthetic α-zirconium phosphate (α-ZrP) layer structures have been prepared via three different approaches. By controlling the concentration of reactants, temperature, pressure, and using a complexing agent, α-ZrP with a wide variation in aspect ratios has been prepared. Synthetic α-ZrP can be easily intercalated by amines and then exfoliated in epoxy to prepare polymer nanocomposites. Nanocomposites that contain exfoliated α-ZrP nanoplatelets with wide variations in aspect ratios can be utilized as model systems to study the structure–property relationship in polymer nanocomposites.

264 citations

Journal ArticleDOI
TL;DR: In this article, the properties of both amorphous and crystalline salts of tetravalent metals are reviewed, with special emphasis on the much studied salt of zirconium phosphate.
Abstract: Properties of both amorphous and crystalline salts of tetravalent metals are reviewed, with special emphasis on the much studied salt of zirconium phosphate. The discussion includes: (1) method of preparation, (2) interlayered crystal structure, (3) effect of counter ions on interlayer distance and steric hindrance, (4) mechanism of ion exchange, and (5) the interaction of polar molecules. Other insoluble acid salts with a layered structure include the phosphates of titanium, hafnium, germanium, tin, lead, and the arsenates of titanium, zirconium, and tin. Fibrous precipitates of the insoluble acid salts of cesium and thorium phosphate are mentioned briefly. Under appropriate experimental conditions, insoluble acid of unknown structure can be obtained. Investigations of their crystalline structure may be highly desirable. The ion exchange capacities of many of these substances are evaluated. 80 references, 3 tables, 4 figures.

243 citations

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TL;DR: In this paper, the conditions for the formation of the colloidal dispersion as well as the preparation of the pellicles, films, and membranes are reported, and some properties of the dispersion and the membranes are discussed.

209 citations

Journal ArticleDOI
TL;DR: In this paper, composite membranes made of recast Nafion filled with different percentages of zirconium phosphate (ZrP) were investigated to increase the stability of conductivity at temperatures higher than 100°C.

163 citations

Journal ArticleDOI
TL;DR: In this paper, high-crystallinity α-zirconium phosphate (α-ZrP) crystals were synthesized and exfoliated with tetra-n-butylammonium hydroxide in aqueous dispersion.
Abstract: High-crystallinity α-zirconium phosphate (α-ZrP) crystals which contain stacks of high aspect ratio nanoplatelets were synthesized and exfoliated with tetra-n-butylammonium hydroxide in aqueous dispersion. The exfoliated α-ZrP nanoplatelets were then transferred into water-miscible organic solvents, such as acetone, by centrifugation and re-dispersion. The resulting exfoliated α-ZrP nanoplatelets in organic solvents can be easily utilized to prepare polymer nanocomposites. Through such an approach, epoxy/α-ZrP nanocomposites containing high aspect ratio α-ZrP nanoplatelets have been prepared. The presence of the well-exfoliated nanocomposite structure is confirmed by powder X-ray diffraction and transmission electron microscopy.

157 citations