Influence of SiO2 Particles on the Defoaming Performance of Silicone Oil Emulsion

2013 ◽  
Vol 455 ◽  
pp. 39-42
Author(s):  
Chen Chen ◽  
Zhi Rong Ren ◽  
Yong Jun He
Keyword(s):  
Silicone Oil ◽  
Experimental Results ◽  
Oil Emulsion ◽  
Different Diameters

The defoaming agent of silicone oil emulsion containing hydrophobic SiO2particles was prepared. The effect of different diameters of SiO2particles and amount of SiO2particles in the emulsion on the defoaming performance was studied, and the mechanism of defoaming was analyzed. The experimental results showed that when the amount of hydrophobic SiO2particles in the emulsion was 1%, the emulsion had good defoaming performance; The emulsion containing nanometer sized SiO2particles showed better defoaming performance than that of the emulsion containing micrometer sized SiO2particles.

Application of Diode Lasers in Interferometrical Length Measurements

2010 ◽  
Vol 437 ◽  
pp. 423-427 ◽  
Author(s):  
Alexander Höink ◽  
Karl Meiners-Hagen ◽  
Otto Jusko ◽  
Ahmed Abou-Zeid
Keyword(s):  
Diode Laser ◽  
Diode Lasers ◽  
Experimental Results ◽  
Length Measurements ◽  
Multi Wavelength ◽  
Different Diameters ◽  
Laser Interferometers

The experimental results for the determination of the form of thin cylinders (Ø ~ 2.5 mm) as well as step heights of gauge blocks (~ 100 µm) and roundness profiles of test samples from metal or glass with different diameters between ~ 2.5 mm and 80 mm using two multi-wavelength diode laser interferometers are presented and discussed.

EFFECT OF IONIC AND NONIONIC SUBSTITUENTS ON THE ELECTRORHEOLOGICAL CHARACTERISTICS OF POLYANILINE DERIVATIVES

2001 ◽  
Vol 15 (06n07) ◽  
pp. 988-995 ◽  
Author(s):  
H. J. CHOI ◽  
M. S. CHO ◽  
J. W. KIM ◽  
R. M. WEBBER ◽  
M. S. JHON
Keyword(s):  
Silicone Oil ◽  
Experimental Results ◽  
Dielectric Spectra ◽  
Er Fluids ◽  
Ionic Copolymer ◽  
Poly Aniline

We report our experimental results on the electrorheological (ER) characteristics of ER fluids consisting of suspensions of semiconducting polyaniline and copolyaniline particles in silicone oil. Ionic sodium diphenylamine sulfonate and nonionic o-ethoxyaniline were introduced to synthesize copolyanilines, i.e. N-substituted copolyaniline and poly (aniline-co-o-ethoxyaniline), respectively. ER fluids using these particles were compared. ER fluids, which contain the ionic copolymer, showed the highest ER performance among polyaniline and its copolymer systems. This result was interpreted in terms of the conductivities of the particles and their dielectric spectra.

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.

Numerical and Experimental Study on Soot Accumulation on the Wall of Falling Fuel Film Micro-Combustor

2010 ◽  
Author(s):  
Ning Mei ◽  
Xiaoyan Wang ◽  
Hongming Zhao ◽  
Yan Li ◽  
Hongyu Si
Keyword(s):  
Flow Field ◽  
Combustion Chamber ◽  
Turbulence Model ◽  
Complex Structure ◽  
Flow Distribution ◽  
Experimental Results ◽  
Fuel Film ◽  
Numerical Result ◽  
Different Diameters ◽  
Micro Combustor

Fluid flow contributes much to fuel-air mixture formation in a micro-combustor, the RNG k-ε turbulence model was used to simulate the cold flow field of a falling fuel film microcombustor, and comparison was made between numerical result and experimental results. It is shown that the RNG k-ε turbulence model translated the flow field of a complex structure micro-combustor and the soot accumulation on the wall of combustion chamber. The experimental results showed that soot accumulation occurs in vortex backflow area near the wall of combustion chamber and the numerical methods is helpful for understanding the way of soot accumulation in the wall of combustion chamber. Therefore, modifications on the flow field with different diameters and entrance direction of the air flow into the primary combustion chamber were made. The numerical simulation of flow distribution showed that the flow field of micro-combustor could be ideal for eliminated soot accumulation.

scholarly journals A Comparative Study of Theoretical Methods to Estimate Semiconductor Nanoparticles’ Size

Crystals ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 226 ◽  
Author(s):  
Fernando Rodríguez-Mas ◽  
Juan Carlos Ferrer ◽  
José Luis Alonso ◽  
David Valiente ◽  
Susana Fernández de Ávila
Keyword(s):  
Average Diameter ◽  
Theoretical Models ◽  
Experimental Results ◽  
Bandgap Energy ◽  
Band Model ◽  
Three Solutions ◽  
The Best Approximation ◽  
Transmission Electron ◽  
Different Diameters ◽  
Brus Equation

In this paper, we compare four different methods to estimate nanoparticle diameters from optical absorption measurements, using transmission electron microscopy (TEM) images as a reference for the nanoparticle size. Three solutions of colloidal nanoparticles coated with thiophenol with different diameters were synthesized by thiolate decomposition. The nanoparticle sizes were controlled by the addition of a certain volume of a 1% sulphur solution in toluene. TEM measurements showed that the average diameter for each type of these nanoparticles was 2.8 nm, 3.2 nm, and 4.0 nm. The methods studied for the calculation of the nanoparticles diameter were: The Brus model, the hyperbolic band model (HBM), the Henglein model, and the Yu equation. We evaluated the importance of a good knowledge of the nanoparticle bandgap energy, and the nature of electronic transitions in the semiconductor. We studied the effects that small variations in the electron and hole effective mass values produced in the Brus equation and in the HBM model for CdS, PbS, and ZnS nanoparticles. Finally, a comparison was performed between the data provided by these models and the experimental results obtained with TEM images. In conclusion, we observed that the best approximation to the experimental results with TEM images was the Brus equation. However, when the bandgap energy was close to the bulk bandgap energy, the theoretical models did not adjust correctly to the size measured from the TEM images.

Effects of Temperature, End-Conditions, Flow, and Branching on the Frequency Response of Pneumatic Lines

1972 ◽  
Vol 94 (1) ◽  
pp. 15-20 ◽  
Author(s):  
M. E. Franke ◽  
A. J. Malanowski ◽  
P. S. Martin
Keyword(s):  
Frequency Response ◽  
Experimental Results ◽  
Distributed Parameter ◽  
Transmission Line Theory ◽  
Amplitude Frequency Response ◽  
End Conditions ◽  
Line Theory ◽  
Effects Of Temperature ◽  
Different Diameters ◽  
Signal Sinusoïdal

Experimental results are presented to show the effects of temperature, flow, end-conditions, and branching on the small-signal sinusoidal amplitude frequency response of pneumatic lines. Distributed parameter transmission line theory for uniform lines is extended to include varying conditions of pressure and temperature along the line as well as series-connected lines of different diameters and parallel branching. The experimental results are compared with the formulated theory for several test configurations. Agreement between experiment and computer solutions based on the theory is relatively good.

Water-in-Silicone Oil Emulsion Stabilizing Surfactants Formed From Native Albumin and α,ω-Triethoxysilylpropyl-Polydimethylsiloxane

2008 ◽  
Vol 9 (8) ◽  
pp. 2153-2161 ◽  
Author(s):  
Paul M. Zelisko ◽  
Kulwinder K. Flora ◽  
John D. Brennan ◽  
Michael A. Brook
Keyword(s):  
Silicone Oil ◽  
Oil Emulsion

Laboratory Study of Cylindrical Sedimentation Traps

1979 ◽  
Vol 36 (10) ◽  
pp. 1288-1291 ◽  
Author(s):  
Y. L. Lau
Keyword(s):  
Reynolds Number ◽  
Aspect Ratio ◽  
Key Words ◽  
Laboratory Study ◽  
Fluid Motion ◽  
Bottom Layer ◽  
Experimental Results ◽  
Dimensionless Variables ◽  
Different Diameters ◽  
Neutrally Buoyant

Observations of the motion of fluid particles in cylindrical sedimentation traps showed that with an increase of the aspect ratio, there is also an increase in the Reynolds number below which neutrally buoyant droplets that were placed near the floor of the trap would remain in the bottom layer. The dependence of the fluid motion on these two dimensionless variables was demonstrated using traps of different diameters. For single cylindrical traps, the experimental results can be used to obtain estimates of the Reynolds number below which resuspension of settled material would not be expected to occur. Key words: sedimentation trap, aspect ratio, Reynolds number, limnological instrument

Real-Time Capacitive Detection of Microdroplets

2010 ◽  
Author(s):  
Caglar Elbuken ◽  
Tomasz Glawdel ◽  
Danny Chan ◽  
Carolyn L. Ren
Keyword(s):  
Real Time ◽  
Silicone Oil ◽  
Signal To Noise Ratio ◽  
Cost Effective ◽  
Passivation Layer ◽  
Experimental Results ◽  
Capacitive Sensors ◽  
Signal To Noise ◽  
Microfabrication Techniques ◽  
Capacitive Detection

This paper presents a cost-effective and scalable method for real-time detection of microdroplets in microchannels. Sensing electrodes are manufactured using standard microfabrication techniques. Commercial capacitive sensors are used for detection. The functional and simple hardware ensures portability and yields a signal-to-noise ratio of 4 for electrodes covered with a passivation layer. Experimental results for detection of aqueous droplets in silicone oil are presented.

scholarly journals Mechanical and Dynamic Mechanical Properties of the Amino Silicone Oil Emulsion Modified Ramie Fiber Reinforced Composites

Polymers ◽  
2021 ◽  
Vol 13 (23) ◽  
pp. 4083
Author(s):  
Liping He ◽  
Fan Xia ◽  
Yuan Wang ◽  
Jianmin Yuan ◽  
Dachuan Chen ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Silicone Oil ◽  
Damping Ratio ◽  
Dynamic Mechanical Properties ◽  
Ramie Fiber ◽  
Cole Plot ◽  
Fiber Reinforced ◽  
Oil Emulsion ◽  
Dynamic Mechanical ◽  
Amino Silicone

The mechanical and dynamic mechanical properties, interface adhesion and microstructures of the amino silicone oil emulsion (ASO) modified short ramie fiber reinforced polypropylene composites (RFPCs) with different fiber fractions were investigated. The RFPCs were made through a combined process of extrusion and injection molding. Mechanical property tests of the RFPCs revealed enhancements in tensile and flexural strengths with increase of the fiber fraction due to the high stiffness of the fiber filler and a better interfacial bonding from ASO treatment. The dynamic mechanical analysis (DMA) results indicated that fiber incorporation plays an important role in DMA parameters (storage modulus, loss modulus, and damping ratio) at Tg by forming an improved interfacial adhesion and providing more effective stress transfer rate and energy dissipation between matrix and fiber. The phase behavior analysis suggests all the RFPCs are a kind of heterogeneity system based on the Cole-Cole plot analysis.

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