scholarly journals Modeling of Carbon Materials Porous Structure Formation

2018 ◽  
Author(s):  
R. Lisovskyi ◽  
I. Poplavskyi ◽  
B. Rachii ◽  
Z. Lyubun
Keyword(s):  
Porous Structure ◽  
Structure Formation ◽  
Carbon Materials

Study of the Water-Glass Role in the Foam Glass Synthesis Using Glycerol Foaming Agent

2021 ◽  
Vol 316 ◽  
pp. 153-158
Author(s):  
Boris M. Goltsman ◽  
Lyubov A. Yatsenko ◽  
Natalia S. Goltsman
Keyword(s):  
Porous Structure ◽  
Structure Formation ◽  
Water Glass ◽  
Glass Batch ◽  
Foam Glass ◽  
Foaming Agent ◽  
Additive Type ◽  
Highly Porous ◽  
Material Porosity

The article discusses the peculiarities of the "water-glass – glycerol" foaming mixture components interaction during foam glass synthesis. The important role of the foaming additive type in the foam glass porous structure formation was described, the main foaming substances were listed. The obtaining and researching technology of the samples was described, the compositions of the initial batches using the "water-glass – glycerol" mixture were developed. It was shown that a material with a highly porous structure and density below 500 kg/m3 can be obtained only with the combined introduction of water-glass and glycerol. In this case, mixtures with a predominance of water-glass in the foaming mixture possess optimal properties. Using DSC, it was shown that the addition of water-glass to the mixture completely eliminates the evaporation of glycerol at lower temperatures and intensifies its combustion at higher temperatures. Thus, the addition of water-glass to the glycerol-based foam glass batch allows glycerol to be saved up to higher temperatures that increases the resulting material porosity.

Carbon materials as template for the preparation of mixed oxides with controlled morphology and porous structure

2014 ◽  
Vol 227 ◽  
pp. 233-241 ◽  
Author(s):  
M.J. Valero-Romero ◽  
A. Cabrera-Molina ◽  
M.O. Guerrero-Pérez ◽  
J. Rodríguez-Mirasol ◽  
T. Cordero
Keyword(s):  
Porous Structure ◽  
Carbon Materials ◽  
Mixed Oxides ◽  
Controlled Morphology

Interaction of Ultrafine Titanium Oxide Particles with Layered Vanadium Oxide Hydrate

1998 ◽  
Vol 520 ◽  
Author(s):  
S. Kittaka ◽  
K. Matsuno ◽  
S. Takahara
Keyword(s):  
Titanium Dioxide ◽  
Vanadium Oxide ◽  
Porous Structure ◽  
Structure Formation ◽  
Titanium Oxide ◽  
Vanadium Pentoxide ◽  
Layered Structure ◽  
Oxide Hydrate ◽  
Toxic Gases ◽  
Oxide Particles

ABSTRACTVanadium pentoxide hydrate was pillared with ultrafine titanium dioxide particles to form expanded layered structure (∼20 A) and thereby forming microporous substance (diameter =∼10 A). Porous structure formation and adsorption of some toxic gases (CO and NO) were discussed.

Processing Methods Used to Create High-Quality Porous Structure of Aerated Concrete

2020 ◽  
Vol 992 ◽  
pp. 212-217
Author(s):  
L.A. Suleymanova ◽  
A.S. Kolomatsky ◽  
M.V. Marushko
Keyword(s):  
Porous Structure ◽  
Structure Formation ◽  
Volume Ratio ◽  
Effect Of Temperature ◽  
Thermal Vacuum ◽  
High Quality ◽  
Molding Sand ◽  
Processing Methods ◽  
Concrete Production ◽  
Aerated Concrete

The efficiency of porous structure formation in aerated concrete can be improved by including the methods of thermal vacuum compaction or thermal vacuum compaction with vibration into the process as a means of creating high-quality composite cellular concrete. A graphic model of a phase composition change in the aerated concrete mix was developed allowing for an evaluation of the recipe and the mode of bubble porosity generation during hardening. This provides a control over the manufacturing processes and helps to produce aerated concrete with the specified porosity balance, which defines product properties.The effect of temperature and vacuum on molding sand during the initial stage of manufacture is proportional to the bubble porosity volume, which is important for a high-quality porous structure formation. In addition to the above, account must be taken of the combined effect of temperature, vacuum and volume ratio of phases in the base mix when using the proposed methods.Introduction of the developed processing methods into the manufacturing process improves the technology of aerated concrete production and allows for a fabrication of the finest advanced heat insulating and structural and heat insulating products.

Overview on the use of surfactants for the preparation of porous carbon materials by the sol-gel method: applications in energy systems

2020 ◽  
Vol 36 (7) ◽  
pp. 771-787 ◽  
Author(s):  
Víctor Manuel Ortiz-Martínez ◽  
Lucía Gómez-Coma ◽  
Alfredo Ortiz ◽  
Inmaculada Ortiz
Keyword(s):  
Porous Structure ◽  
Porous Carbon ◽  
Carbon Materials ◽  
Sol Gel ◽  
Energy Systems ◽  
Polymerization Reaction ◽  
Gel Method ◽  
Sol Gel Method ◽  
Porous Carbon Materials ◽  
Surfactant Assisted

AbstractPorous carbon materials attract great interest because of the wide range of applications in electrochemical energy systems, especially in the case of structured and porosity-tuned carbons prepared by template-assisted methods. The use of surfactant prevents the collapse of the porous structure during the air-drying stage in the sol-gel process, which is regarded as a critical stage in this method. This work offers an overview on the use of surfactants as templates for the manufacture of tunable porous carbon materials by the sol-gel method mainly using the polymerization reaction of resorcinol (R) and formaldehyde (F). The use of surfactants avoids the application of other economically disadvantaged drying techniques such as supercritical fluids and freeze-drying. The surfactant-assisted sol-gel methods reported in the literature for the fabrication of porous carbons are widely discussed, as well as the potentiality of the synthesized materials as electrodes in electrochemical systems, which greatly depends on the final porous structure. Besides, this work offers information on hybrid methods in which surfactants are used not only for the fabrication of porous carbon materials with mesoporous/microporous structure but also for the development of advanced structures and composites, including nanomaterials with enhanced properties. Finally, future prospects in the synthesis of carbon materials prepared by surfactant-assisted sol-gel method are presented.

Porous structure optimization of electrospun carbon materials

2020 ◽  
Vol 69 (6) ◽  
pp. 1106-1113 ◽  
Author(s):  
K. M. Skupov ◽  
I. I. Ponomarev ◽  
Yu. M. Volfkovich ◽  
V. E. Sosenkin ◽  
Iv. I. Ponomarev ◽  
...  
Keyword(s):  
Porous Structure ◽  
Carbon Materials ◽  
Structure Optimization

Carbon foams: 3D porous carbon materials holding immense potential

2020 ◽  
Vol 8 (45) ◽  
pp. 23699-23723 ◽  
Author(s):  
Heguang Liu ◽  
Shaoqing Wu ◽  
Na Tian ◽  
Fuxue Yan ◽  
Caiyin You ◽  
...  
Keyword(s):  
Porous Structure ◽  
Porous Carbon ◽  
Carbon Material ◽  
Carbon Materials ◽  
Carbon Foam ◽  
Excellent Performance ◽  
Porous Carbon Materials ◽  
Academic Communities ◽  
Carbon Foams ◽  
Immense Potential

Carbon foam is a representative of porous-structured carbon material, which has attracted increasing attention from academic communities and industry because of its unique 3D porous structure and excellent performance for various applications.

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