Foam: Production of dynamic multiplicity

2021 ◽  
Keyword(s):  
Foam Production

scholarly journals Aluminium foam production control by using a combined fuzzy-genetic algorithm model

Procedia CIRP ◽  
2020 ◽  
Vol 88 ◽  
pp. 503-508
Author(s):  
Gennaro Salvatore Ponticelli ◽  
Stefano Guarino ◽  
Oliviero Giannini ◽  
Flaviana Tagliaferri ◽  
Simone Venettacci ◽  
...  
Keyword(s):  
Genetic Algorithm ◽  
Production Control ◽  
Aluminium Foam ◽  
Fuzzy Genetic Algorithm ◽  
Fuzzy Genetic ◽  
Foam Production ◽  
Genetic Algorithm Model

scholarly journals Resin and carbon foam production by cationic step-growth polymerization of organic carbonates

2017 ◽  
Vol 8 (2) ◽  
pp. 404-413 ◽  
Author(s):  
L. Wöckel ◽  
A. Seifert ◽  
C. Mende ◽  
I. Roth-Panke ◽  
L. Kroll ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Controlled Release ◽  
Carbon Foam ◽  
Organic Carbonates ◽  
Step Growth ◽  
Step Growth Polymerization ◽  
Foam Production

Acid induced step-growth polymerizations of bis(p-methoxybenzyl) carbonate (pMBC), bis(m-methoxybenzyl) carbonate (mMBC) and difurfuryl carbonate (DFC) have been performed to produce resin-foams, because controlled release of carbon dioxide takes place during polymerization of those organic carbonates.

Physiochemical properties and reproducibility of air-based sodium tetradecyl sulphate foam using the Tessari method

2016 ◽  
Vol 32 (6) ◽  
pp. 390-396 ◽  
Author(s):  
Mike R Watkins ◽  
Richard J Oliver
Keyword(s):  
Size Distribution ◽  
Bubble Size ◽  
Bubble Size Distribution ◽  
Foam Density ◽  
Physiochemical Properties ◽  
Significant Difference ◽  
Experienced Operator ◽  
Sodium Tetradecyl Sulphate ◽  
Foam Production ◽  
Made In

Objectives The objectives were to examine the density, bubble size distribution and durability of sodium tetradecyl sulphate foam and the consistency of production of foam by a number of different operators using the Tessari method. Methods 1% and 3% sodium tetradecyl sulphate sclerosant foam was produced by an experienced operator and a group of inexperienced operators using either a 1:3 or 1:4 liquid:air ratio and the Tessari method. The foam density, bubble size distribution and foam durability were measured on freshly prepared foam from each operator. Results The foam density measurements were similar for each of the 1:3 preparations and for each of the 1:4 preparations but not affected by the sclerosant concentration. The bubble size for all preparations were very small immediately after preparation but progressively coalesced to become a micro-foam (<250 µm) after the first 30 s up until 2 min. Both the 1% and 3% solution foams developed liquid more rapidly when made in a 1:3 ratio (37 s) than in a 1:4 ratio (45 s) but all combinations took similar times to reach 0.4 ml liquid formation. For all the experiments, there was no statistical significant difference between operators. Conclusions The Tessari method of foam production for sodium tetradecyl sulphate sclerosant is consistent and reproducible even when made by inexperienced operators. The best quality foam with micro bubbles should be used within the first minute after production.

Metal Foam Production Process Using Hydro-Gel and its Improvement

2007 ◽  
Vol 539-543 ◽  
pp. 1845-1850 ◽  
Author(s):  
Toru Shimizu ◽  
Kunio Matsuzaki
Keyword(s):  
Stainless Steel ◽  
Production Process ◽  
Cell Size ◽  
Metal Foam ◽  
Heating Temperature ◽  
Foaming Agent ◽  
Steel Foam ◽  
Foam Production

Already, we are developing the process to produce stainless steel foam over 97% porosity using hydro-gel binder. However, this process is very sensitive process, and foaming condition is affected by the slight deference of heating temperature. Therefore, we tried to improve the process by changing the foaming agent and foaming conditions. By the improvement of the process, the foaming operation becomes stable and finer cell size stainless steel foam can be obtained.

scholarly journals Dynamics of Microbial Indicators in Waste Water

2017 ◽  
Vol 74 (2) ◽  
pp. 116
Author(s):  
Vlad STOIAN ◽  
Roxana VIDICAN ◽  
Ioan ROTAR ◽  
Florin PĂCURAR
Keyword(s):  
Abiotic Factors ◽  
Specific Response ◽  
Filamentous Bacteria ◽  
Qualitative And Quantitative ◽  
External Pressures ◽  
Quantitative Changes ◽  
Water Ecosystems ◽  
Microbial Groups ◽  
Foam Production

Water ecosystems are constantly under the pressure of a high number of biotic and abiotic factors, and their action leads to the occurrence of fluctuations in species and populations. The specific response of organisms to external pressures leads to the reorganization of ecosystems, with qualitative and quantitative changes. The aim is to identify the microbial groups with the highest potential in the waste waters. Data were collected during 2015-16 in Bistrita. Identifying the bioindicators quality of microorganisms and their importance in ecosystems was done by comparing them with international databases. The use of microorganisms as bioindicators involves knowing the requirements for one or more environmental variables. The concept refers to the ability of microorganisms to accumulate pollutants. Flagellates are tolerant to acidity and react quickly and with sensitivity to environmental stress by inhibiting their movement. The multiplication of flagellates and filamentous bacteria is manifested through water disturbance and foam production.

scholarly journals Application of new make-ups of surfactants for foam production

2012 ◽  
Vol 29 (2) ◽  
pp. 389
Author(s):  
Maria Turicyna ◽  
Andrej Âkovlev
Keyword(s):  
Foam Production

FOAMING AGENT FOR ALLOYS OF ALUMINIUM FOAMS

2018 ◽  
Vol 32 (2) ◽  
pp. 53-59
Author(s):  
Jozsef Juhasz ◽  
Vasile Hotea ◽  
Keyword(s):  
Thermal Analysis ◽  
Pore Structure ◽  
Powder Compact ◽  
Matrix Alloy ◽  
Aluminium Foam ◽  
Foaming Agent ◽  
Melting Technique ◽  
Foam Production

The powder compact melting technique for aluminium foam production as practised today accepts a certain mismatch between foaming agent decomposition and matrix alloy melting temperatures.This mismatch is believed to influence the pore structure in an unfavourable way. Adjustment of TiH 2 decomposition as well as liquidus and solidus temperatures of matrix alloys can be used to counteract it. Effects of TiH 2 thermal are investigated using thermal analysis. TiH 2 variants gained via annealing treatments were used to produce aluminium foam precursor materials.

Rubber Foam Processing via Bubbling Technique

2019 ◽  
Vol 962 ◽  
pp. 96-100 ◽  
Author(s):  
Sanit Sirikulchaikij ◽  
Benjaporn Nooklay ◽  
Rungrote Kokoo ◽  
Matthana Khangkhamano
Keyword(s):  
Cell Shape ◽  
High Speed ◽  
Bubble Column ◽  
Cell Structure ◽  
Constant Flow ◽  
Bubble Volume ◽  
Constant Flow Rate ◽  
Foam Production ◽  
Inexpensive Technique ◽  
Scanning Electron

Natural rubber foams are currently produced by the two well-known processes of Dunlop and Talalay. Dunlop process, however, requires a high-speed Hobart Mixer to generate a high bubble-volume, while Talalay is complexity and expensive technique. Here, a simple and inexpensive technique for rubber foam production was introduced. The process involved air flowing with a constant flow rate through a porous diffuser, firmly connected to the bubble column containing compound latex, to generate a high bubble-volume. Microstructure of the as-produced rubber foams was examined using a scanning electron microscope (SEM), in comparison with that of the purchased Dunlop foam. Spherical cell shape with a uniform interconnected-cell structure was gained from the bubbled foams, while fractured-cell structure was obtained from the Dunlop foam.

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