scholarly journals Hindering the Kinetic Selection of Dendritic Ba-Fresnoite by Phase Separation in a Glass of the Near-Eutectic Composition Ba2TiSi2O8–2.625SiO2

2019 ◽  
Vol 19 (6) ◽  
pp. 3559-3566 ◽  
Author(s):  
Wolfgang Wisniewski ◽  
Peter Švančárek ◽  
Milan Parchovianský ◽  
Christian Thieme ◽  
Christian Rüssel
Keyword(s):  
Phase Separation ◽  
Eutectic Composition ◽  
Kinetic Selection ◽  
Selection Of

A basis for the kinetic selection of polymorphs during solution crystallization of organic compounds

CrystEngComm ◽  
2018 ◽  
Vol 20 (37) ◽  
pp. 5551-5561 ◽  
Author(s):  
Vivek Verma ◽  
Benjamin K. Hodnett
Keyword(s):  
Organic Compounds ◽  
Solution Crystallization ◽  
P Domain ◽  
Stable Forms ◽  
Kinetic Selection ◽  
Selection Of

Domain diagram for supersaturation needed for a given polymorph pair to select kinetically the metastable or stable forms.

Initial Investigation Into the Vitrification of High Molybdenum Solids in Borosilicate Glass

2009 ◽  
Vol 1193 ◽  
Author(s):  
Barbara F. Dunnett ◽  
Nick R. Gribble ◽  
Andrew D. Riley ◽  
Carl J. Steele
Keyword(s):  
Phase Separation ◽  
Borosilicate Glass ◽  
Spent Nuclear Fuel ◽  
Storage Tanks ◽  
Waste Storage ◽  
Waste Vitrification ◽  
Durability Testing ◽  
Glass Formulation ◽  
Selection Of ◽  
Scanning Electron

AbstractSellafield Ltd operates a Waste Vitrification Plant (WVP) to immobilise the arisings from the reprocessing of spent nuclear fuel. Washout of solids from the base of waste storage tanks in preparation for decommissioning is likely to produce feeds enriched in molybdenum to the WVP. Vitrification of such feeds in the borosilicate glass formulation currently used by the WVP for vitrification of reprocessing waste has been investigated to determine the maximum achievable loading of MoO3.The vitrification of molybdenum in the absence and presence of reprocessing waste was studied. A number of glasses were manufactured in the laboratory containing various waste loadings. The resultant glasses were examined both visually and under the scanning electron microscope for the presence of any phase separation. Additional aluminium was added to the glasses manufactured in the absence of reprocessing waste to improve the durability of the glass. In borosilicate glass containing 3.5 wt% Al2O3 the onset of a molybdenum phase separation was observed in glasses containing 2.6 wt% MoO3. In the presence of Magnox reprocessing waste, phase separation was observed when the product contained >3.8 wt% MoO3. Soxhlet durability testing of a selection of the glasses manufactured was carried out. The Soxhlet durability of glasses in the absence of phase separation was good.

A Facile Method for Selection of Solvents for Fabrication of Polypropylene Membranes by Thermally Induced Phase Separation

2021 ◽  
pp. 1-17
Author(s):  
Konstantin V. Pochivalov ◽  
Andrey V. Basko ◽  
Tatyana N. Lebedeva ◽  
Mikhail Yu. Yurov ◽  
Alexey A. Yushkin ◽  
...  
Keyword(s):  
Phase Separation ◽  
Thermally Induced Phase Separation ◽  
Thermally Induced ◽  
Selection Of

scholarly journals Kinetic selection of polymeric guanosine architectures from dynamic supramolecular libraries

2015 ◽  
Vol 18 (9) ◽  
pp. 960-965 ◽  
Author(s):  
Anca Meffre ◽  
Eddy Petit ◽  
Didier Cot ◽  
Mihail Barboiu
Keyword(s):  
Kinetic Selection ◽  
Selection Of

scholarly journals A unique route of colloidal phase separation yields stress-free gels

2020 ◽  
Vol 6 (41) ◽  
pp. eabb8107
Author(s):  
Hideyo Tsurusawa ◽  
Shunto Arai ◽  
Hajime Tanaka
Keyword(s):  
Phase Separation ◽  
Mechanical Stress ◽  
Volume Fraction ◽  
Colloidal Suspensions ◽  
Biological Science ◽  
Substantial Impact ◽  
Gel Network ◽  
Selection Of ◽  
Particulate Systems

Phase separation often leads to gelation in soft and biomatter. For colloidal suspensions, we have a consensus that gels form by the dynamical arrest of phase separation. In this gelation, percolation of the phase-separated structure occurs before the dynamical arrest, leading to the generation of mechanical stress in the gel network. Here, we find a previously unrecognized type of gelation in dilute colloidal suspensions, in which percolation occurs after the local dynamical arrest, i.e., the formation of mechanically stable, rigid clusters. Thus, topological percolation generates little mechanical stress, and the resulting gel is almost stress-free when formed. We also show that the selection of these two types of gelation (stressed and stress-free) is determined solely by the volume fraction as long as the interaction is short-ranged. This universal classification of gelation of particulate systems may have a substantial impact on material and biological science.

scholarly journals Direct Printing of Functional 3D Objects Using Polymerization-Induced Phase Separation

2020 ◽  
Author(s):  
Bhavana Deore ◽  
Kathleen L. Sampson ◽  
Thomas Lacelle ◽  
Nathan Kredentser ◽  
Jacques Lefebvre ◽  
...  
Keyword(s):  
Phase Separation ◽  
Functional Properties ◽  
Polymer Network ◽  
Dissimilar Materials ◽  
Functional Coatings ◽  
Smart Objects ◽  
Direct Production ◽  
3D Printed ◽  
Multiple Materials ◽  
Selection Of

<div>3D printing has enabled the unique combination of structures, geometries and functional properties </div><div>otherwise unattainable via traditional manufacturing techniques, yet its adoption as a mainstream </div><div>manufacturing platform for functional objects is hindered by the physical challenges in printing of </div><div>multiple materials. Vat polymerization offers a polymer chemistry-based approach to generating </div><div>smart objects, in which phase separation is controlled in order to achieve, at once, desirable </div><div>chemical and functional properties of final 3D printed objects, and indeed direct-production of 3D </div><div>printed smart objects. This study demonstrates how the spatial distribution of different material </div><div>phases can be modulated by controlling the kinetics of gelation, polymer network density and </div><div>material diffusivity through the judicious selection of photoresin components. A rich selection of </div><div>morphologies and functional coatings are generated, illustrating a promising way forward in the </div><div>integration of dissimilar materials in 3D printed smart or functional objects. </div>

scholarly journals Kinetic selection of Pd4L2 metallocyclic and Pd6L3 trigonal prismatic assemblies

2020 ◽  
Vol 56 (79) ◽  
pp. 11799-11802
Author(s):  
Helen M. O’Connor ◽  
Marco Coletta ◽  
Alvaro Etcheverry-Berríos ◽  
Gary S. Nichol ◽  
Euan K. Brechin ◽  
...  
Keyword(s):  
Trigonal Prismatic ◽  
Kinetic Selection ◽  
Selection Of

Kinetic access to distorted metallocyclic and trigonal prismatic assemblies can be achieved using auxiliary ligands to control the dynamics of M–L interactions.

scholarly journals Impact of Conditioning Substances and Filtration Pressure on Dewatering Efficiency of Sewage Sludge

Energies ◽  
2021 ◽  
Vol 14 (2) ◽  
pp. 361
Author(s):  
Tomasz Kamizela ◽  
Mariusz Kowalczyk
Keyword(s):  
Phase Separation ◽  
Fly Ash ◽  
Filter Cake ◽  
Solid Phase ◽  
Sludge Dewatering ◽  
High Quality ◽  
Filtration Process ◽  
Filtration Pressure ◽  
Selection Of

Sludge dewatering is a key element in sludge’s processing and management. Solid-phase separation, sludge volume reduction and the separation of a high-quality supernatant are the main tasks of the dewatering devices. The effectiveness of this task, in turn, results from the selection of the dewatering method and conditioning of the sludge before dewatering. The aim of the research was to determine the influence of conditioning substances (polyelectrolyte, fly ash and zeolite) on the efficiency of dewatering at variable filtration pressure. The use of polyelectrolyte in sludge conditioning was a solution that increased the efficiency of the filtration process. On the contrary, the use of structure-forming substances (fly ash and zeolite) slows the process but reduces the hydration of the filter cake. The same trends were obtained in dual conditioning combining dosing of polyelectrolyte and ash or zeolite. It was also shown that the dewatering efficiency of conditioned sludge with these two different substances (ash and zeolite) was the same. The use of zeolite in independent or dual conditioning was important for the quality of the supernatant.

Sign in / Sign up

Export Citation Format

Share Document