scholarly journals The Physical Properties of Microcellular Composite Foams

1989 ◽  
Vol 171 ◽  
Author(s):  
Alice M. Nyitray ◽  
Joel M. Williams ◽  
David Onn ◽  
Adam Witek
Keyword(s):  
Thermal Conductivity ◽  
Physical Properties ◽  
Polystyrene Foam ◽  
Oil Emulsion ◽  
Composite Foams ◽  
Internal Phase ◽  
Free Radical Initiator ◽  
Styrene Divinylbenzene ◽  
Phase Water ◽  
Water In Oil Emulsion

ABSTRACTRecently we reported on a method of preparing microcellular composite foams. In this procedure an open-celled polystyrene foam is prepared by the polymerization of a high-internal-phase water-in-oil emulsion containing styrene, divinylbenzene, surfactant, free-radical initiator and water. After drying, the cells of the polystyrene foam are then filled with other materials such as aerogel or resoles. The physical properties of these materials e.g., surface area, density, thermal conductivity, and compressive strength will be presented.

Dispersion behavior and attachment of high internal phase water-in-oil emulsion droplets during fine coal flotation

Fuel ◽  
2019 ◽  
Vol 253 ◽  
pp. 273-282 ◽  
Author(s):  
Ying Lu ◽  
Xuming Wang ◽  
Weiping Liu ◽  
Enze Li ◽  
Fangqin Cheng ◽  
...  
Keyword(s):  
Oil Emulsion ◽  
Coal Flotation ◽  
Fine Coal ◽  
Emulsion Droplets ◽  
Dispersion Behavior ◽  
Internal Phase ◽  
Phase Water ◽  
Water In Oil Emulsion

Water transport by osmosis through a high-internal-phase, water-in-oil emulsion

2021 ◽  
Vol 232 ◽  
pp. 116348
Author(s):  
Gabrielle DeIuliis ◽  
Girija Sahasrabudhe ◽  
Robert H. Davis ◽  
Kevin P. Galvin
Keyword(s):  
Water Transport ◽  
Oil Emulsion ◽  
Internal Phase ◽  
Phase Water ◽  
Water In Oil Emulsion

Effect of the Surfactant Concentration on Sinking Electric Discharge Machining Performance with Water-in-Oil Emulsion as Dielectric

2011 ◽  
Vol 189-193 ◽  
pp. 3153-3157
Author(s):  
Yan Zhen Zhang ◽  
Yong Hong Liu ◽  
Ren Jie Ji ◽  
Bao Ping Cai
Keyword(s):  
Physical Properties ◽  
Electric Discharge ◽  
Surfactant Concentration ◽  
Emulsion Stability ◽  
Experimental Results ◽  
Machining Performance ◽  
Electric Discharge Machining ◽  
Oil Emulsion ◽  
The Stability ◽  
Water In Oil Emulsion

In this paper, the EDM performance of water-in-oil (W/O) emulsions dielectric with different surfactant concentration is investigated by correlated to its physical properties, such as viscosity and droplets size, which is predominantly determined by the surfactant concentration. Experimental results show that the stability of the W/O emulsions increases with increasing surfactant concentration, whereas the EDM performance deteriorates with increasing surfactant concentration. So, taking a comprehensively consideration of the emulsion stability and EDM performance, the concentration of surfactant must be appropriately selected.

scholarly journals Morphology control in polymerised high internal phase emulsion templated via macro-RAFT agent composition: visualizing surface chemistry

2018 ◽  
Vol 9 (2) ◽  
pp. 213-220 ◽  
Author(s):  
A. Khodabandeh ◽  
R. D. Arrua ◽  
B. R. Coad ◽  
T. Rodemann ◽  
T. Ohigashi ◽  
...  
Keyword(s):  
Acrylic Acid ◽  
Surface Chemistry ◽  
Morphology Control ◽  
Polymeric Surfactant ◽  
High Internal Phase Emulsion ◽  
Oil Emulsion ◽  
Internal Phase ◽  
Raft Agent ◽  
Water In Oil Emulsion ◽  
Poly Acrylic Acid

A series of polymerized high internal phase emulsion (polyHIPE) materials have been prepared by using a water in oil emulsion stabilized by a macro-RAFT agent, 2-(butylthiocarbonothioylthio)-2-poly(styrene)-b-poly(acrylic acid), acting as a polymeric surfactant.

scholarly journals Ultrafast Plug Flow Agglomeration—Exploiting Hydrophobic Interactions Via a Concentrated Water-In-Oil Emulsion Binder

Minerals ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 506 ◽  
Author(s):  
Kim van Netten ◽  
Daniel J. Borrow ◽  
Kevin P. Galvin
Keyword(s):  
Hydrophobic Interactions ◽  
Organic Liquid ◽  
Plug Flow ◽  
High Shear ◽  
Oil Emulsion ◽  
Pressure Drops ◽  
Fine Coal ◽  
Internal Phase ◽  
Coal Tailings ◽  
Water In Oil Emulsion

The selective agglomeration of a fine coal tailings stream using a high internal phase emulsion binder was investigated using a continuous steady-state plug flow through a high shear constriction. The emulsion binder effectively switches off the viscous resistance to particle–binder collision and adhesion, revealing the remarkable underlying speed of hydrophobic interactions. The emulsion binder is permeable, meaning the lubrication force between the particle and binder vanishes. The binder comprised a 95% aqueous solution dispersed within a 5% organic liquid (including the emulsifier). The agglomeration occurred within a high shear zone formed using a flow constriction within a 25 mm diameter pipe. The performance of the process was investigated at different flowrates in the range of 20–128 L/min, equating to extraordinarily high superficial flow velocities of up to 4.2 m/s and pressure drops in the range of 20–220 kPa. This rate greatly exceeds the nominal superficial feed velocity in flotation of order 0.01 m/s. Provided there was sufficient shear within the flow constriction, it was possible to process fine coal tailings with a feed ash of 50.1%, and generate a product ash of 8% at a combustible recovery of ~78%.

BRUSH ALLOY 3

Alloy Digest ◽  
1983 ◽  
Vol 32 (3) ◽  
Keyword(s):  
Mechanical Properties ◽  
Thermal Conductivity ◽  
Corrosion Resistance ◽  
Physical Properties ◽  
Copper Alloy ◽  
Elevated Temperatures ◽  
Physical And Mechanical Properties ◽  
Heat Treating ◽  
Good Resistance ◽  
Good Corrosion Resistance

Abstract BRUSH Alloy 3 offers the highest electrical and thermal conductivity of any beryllium-copper alloy. It possesses an excellent combination of moderate strength, good corrosion resistance and good resistance to moderately elevated temperatures. Because of its unique physical and mechanical properties, Brush Alloy 3 finds widespread use in welding applications (RWMA Class 3), current-carrying springs, switch and instrument parts and similar components. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fatigue. It also includes information on corrosion resistance as well as casting, forming, heat treating, machining, joining, and surface treatment. Filing Code: Cu-454. Producer or source: Brush Wellman Inc..

WIELAND DURO ELMEDUR HA

Alloy Digest ◽  
2020 ◽  
Vol 69 (3) ◽  
Keyword(s):  
Thermal Conductivity ◽  
Physical Properties ◽  
Cobalt Nickel ◽  
Hardened Condition

Abstract Wieland Duro Elmedur HA is a heat-treatable copper-cobalt-nickel-beryllium alloy. In the age hardened condition, this alloy exhibits high electrical and thermal conductivity along with moderate strength and hardness. This datasheet provides information on composition, physical properties, and hardness. It also includes information on joining. Filing Code: Cu-906. Producer or source: Wieland Duro GmbH.

OLIN C197

Alloy Digest ◽  
1999 ◽  
Vol 48 (1) ◽  
Keyword(s):  
Thermal Conductivity ◽  
Wear Resistance ◽  
Physical Properties ◽  
Tensile Properties ◽  
High Performance ◽  
Corrosion And Wear ◽  
Contact Forces ◽  
High Current ◽  
Lower Strength ◽  
Current Carrying Capability

Abstract Olin C197 is a second-generation high performance alloy developed by Olin Brass. It has a strength and bend formability similar to C194 (see Alloy Digest Cu-360, September 1978), but with 25% higher electrical and thermal conductivity. High conductivity allows C197 to replace brasses and bronzes in applications where high current-carrying capability is required. Also, the strength of C197 provides higher contact forces when substituted for many lower strength coppers. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion and wear resistance as well as forming and joining. Filing Code: CU-627. Producer or source: Olin Brass.

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