Synthesis and Characterization of a New Family of Microporous Zirconium Silicates

1998 ◽  
Vol 549 ◽  
Author(s):  
David S. Bern ◽  
Robert L. Bedard ◽  
Robert W. Broach ◽  
E. Alejandro Leon-Escamilla ◽  
Jana L. Gisselquist ◽  
...  
Keyword(s):  
Hydrothermal Synthesis ◽  
Synthesis And Characterization ◽  
Type I ◽  
Framework Materials ◽  
New Family ◽  
Zirconium Silicate ◽  
Synthesis Approach ◽  
Silicate Framework

AbstractA family of microporous zirconium-silicate framework materials designated as UZSi (UOP zirconium silicates) has been synthesized and structurally characterized. A general hydrothermal synthesis approach yielded a variety of known and novel zirconium-silicate topologies consisting of ZrOa23(oct) and SiO20(tet) units. A novel microporous framework (UZSi-9, Na2ZrSi3O9·x H2O) has been synthesized and structurally characterized. This framework contains A- and A-propeller units, which can also be found in the framework of the compositionally similar UZSi-1 1 (Na2ZrSi3O9·x H2O). Both UZSi-9 and UZSi-II adsorb and desorb water with a Type I microporous isotherm.

Hydrothermal synthesis and characterization of a layered zirconium silicate

2013 ◽  
Vol 180 ◽  
pp. 48-55 ◽  
Author(s):  
Chaochao Yue ◽  
Pieter C.M.M. Magusin ◽  
Brahim Mezari ◽  
Marcello Rigutto ◽  
Emiel J.M. Hensen
Keyword(s):  
Hydrothermal Synthesis ◽  
Synthesis And Characterization ◽  
Zirconium Silicate

scholarly journals Semi-Crystalline Hydrophobic Polyamidoamines: A New Family of Technological Materials?

Polymers ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 1018
Author(s):  
Massimo Marcioni ◽  
Jenny Alongi ◽  
Elisabetta Ranucci ◽  
Mario Malinconico ◽  
Paola Laurienzo ◽  
...  
Keyword(s):  
Maximum Stress ◽  
Water Resistance ◽  
Prolonged Exposure ◽  
Water Soluble ◽  
Synthesis And Characterization ◽  
Molecular Weights ◽  
New Family ◽  
Methylene Groups ◽  
Methane Flame

The hitherto known polyamidoamines (PAAs) are not suitable as structural materials because they are usually water-soluble or swellable in water. This paper deals with the synthesis and characterization of semi-crystalline hydrophobic PAAs (H-PAAs) by combining different bis-sec-amines with bis-acrylamides obtained from C6–C12 bis-prim-amines. H-PAAs were initially obtained in a solution of benzyl alcohol, a solvent suitable for both monomers and polymers. Their number average molecular weights, M¯n, which were determined with 1H-NMR by evaluating the percentage of their terminal units, varied from 6000 to >10,000. The solubility, thermal properties, ignitability and water resistance of H-PAAs were determined. They were soluble in organic solvents, semi-crystalline and thermally stable. The most promising ones were also prepared using a bulk process, which has never been previously reported for PAA synthesis. In the form of films, these H-PAAs were apparently unaffected by water. The films underwent tensile and wettability tests. They showed similar Young moduli (260–263 MPa), whereas the maximum stress and the stress at break depended on the number of methylene groups of the starting bis-acrylamides. Their wettability was somewhat higher than that of common Nylons. Interestingly, none of the H-PAAs considered, either as films or powders, ignited after prolonged exposure to a methane flame.

Hydrothermal Synthesis and Characterization of SnS2Nanocrystals

2001 ◽  
Vol 30 (12) ◽  
pp. 1294-1295 ◽  
Author(s):  
Chunrui Wang ◽  
Kaibin Tang ◽  
Qing Yang ◽  
Yitai Qian ◽  
Cunyi Xu
Keyword(s):  
Hydrothermal Synthesis ◽  
Synthesis And Characterization

Hydrothermal synthesis and characterization of (N(C2H5)4)4[VMo12V2O44]

2007 ◽  
Vol 42 (10) ◽  
pp. 955-960 ◽  
Author(s):  
S. Cevik ◽  
Z. Alkan ◽  
M. Poyraz ◽  
M. Sarı ◽  
O. Büyükgüngör
Keyword(s):  
Hydrothermal Synthesis ◽  
Synthesis And Characterization
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