Processing of Silicas Formed by Slip Casting

2014 ◽  
Vol 775-776 ◽  
pp. 525-528 ◽  
Author(s):  
Sabrina Arcaro ◽  
João Batista Rodrigues Neto ◽  
Francielly Roussenq Cesconeto ◽  
Jaime Domingos Teixeira ◽  
Fabiano Raupp-Pereira ◽  
...  
Keyword(s):  
Polyvinyl Alcohol ◽  
Silica Gel ◽  
Amorphous Silica ◽  
Slip Casting ◽  
Rheological Characterization ◽  
Volume Percentage ◽  
Silica Fibers ◽  
Mechanical Mixer

In this work suspensions containing natural amorphous silica fibers (NASF), amorphous silica gel and nanometric colloidal amorphous silica were prepared and rheologically analyzed. The suspensions were prepared by varying the volume percentage of solids between 22 and 32%, ammonium polyacrylate (APA), as dispersant, from 0 to 5% and polyvinyl alcohol (PVA), as binder, between 1 and 3.5%. The mixtures were obtained in a propeller mechanical mixer and formed by slip casting. The results of rheological characterization indicated that the suspensions with 30% solids, 4% dispersant and 3% binder were those that showed a stable rheological system and suitable for processing by slip casting.

Formation of an amorphous silica gel barrier under CO2 storage conditions

2018 ◽  
Vol 78 ◽  
pp. 27-36 ◽  
Author(s):  
C.A. Castañeda-Herrera ◽  
J.R. Black ◽  
E.M. Llanos ◽  
G.W. Stevens ◽  
R.R. Haese
Keyword(s):  
Silica Gel ◽  
Amorphous Silica ◽  
Co2 Storage ◽  
Storage Conditions ◽  
Gel Barrier

Neutron Compton scattering investigation of sodium hydride: From bulk material to encapsulated nanoparticulates in amorphous silica gel

2011 ◽  
Vol 134 (11) ◽  
pp. 114511 ◽  
Author(s):  
A. G. Seel ◽  
A. Sartbaeva ◽  
J. Mayers ◽  
A. J. Ramirez-Cuesta ◽  
P. P. Edwards
Keyword(s):  
Compton Scattering ◽  
Silica Gel ◽  
Amorphous Silica ◽  
Bulk Material ◽  
Sodium Hydride

Physicochemical and biological assessment of PEEK composites embedding natural amorphous silica fibers for biomedical applications

2017 ◽  
Vol 79 ◽  
pp. 354-362 ◽  
Author(s):  
Patrícia R. Monich ◽  
Fernanda V. Berti ◽  
Luismar M. Porto ◽  
Bruno Henriques ◽  
Antonio P. Novaes de Oliveira ◽  
...  
Keyword(s):  
Amorphous Silica ◽  
Biomedical Applications ◽  
Biological Assessment ◽  
Silica Fibers

Core-shell Fe-SiO2-polyamine magnetic nanoparticles for metal recovery using a continuous flow pipeline reactor

2018 ◽  
Vol 90 (8) ◽  
pp. 1225-1235
Author(s):  
Emile Deluca ◽  
Ryan Latterman ◽  
Edward Rosenberg
Keyword(s):  
Infrared Spectroscopy ◽  
Magnetic Nanoparticles ◽  
Silica Gel ◽  
Amorphous Silica ◽  
Continuous Flow ◽  
Metal Ion ◽  
Magnetic Nanomaterials ◽  
Core Shell ◽  
Successful Development ◽  
Kinetics Of

Abstract A series of core-shell magnetic nanomaterials have been synthesized with the intent of applying them for metal ion capture in a newly designed pipeline reactor. The synthetic chemistry is an extension of a previously developed family of materials based on amorphous silica gel, which has been used in the mining and remediation industries. The nanoparticles were characterized by infrared spectroscopy and TEM and SEM techniques. The size of the starting magnetite core was critical to the behavior of the particles under metal sequestering conditions. The capture kinetics of the resulting nanoagregates is 10 times faster than related micro composites. All of the tests performed point to the future successful development of a technology that circumvents the disadvantages associated with the use of column based microparticles.

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