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Online since: October 2010
Authors: Xue Gui Liu, Chang Feng Liu, Hong Shao, En De Wang
In this paper, a peroxide-tertiary amine oxidation-reduction initiator system was used to synthesize a cross-linked polyacrylamide/bentonite composite at room temperature.
Fig.1 FTIR spectra of Na-bentonite, PAM, and the Na-BNT/PAM composite XRD.As seen in Fig.2, XRD test data demonstrates that the d(001) peak of natural Na-bentonite is 1.2455nm.
Conclusions A peroxide-tertiary amine oxidation-reduction initiator system was used to synthesize a cross-linked polyacrylamide/bentonite composite at room temperature.
Online since: July 2014
Authors: Ting Ting Zhao, Hong Fu Sun, Hai Jun Wang
The major purpose is to systematically integrate the application of modularity in critical stages of product lifecycle and to facilitate the awareness and realization of modularity for manufacturing enterprise, so that the comprehensive benefits of modularity such as short time-to-market, parts number reduction, and high production efficiency can be realized effectively.
Gualandris [5] provides a framework that relates the adoption of postponement enablers (i.e. product modularity and process modularity) to the reduction of the negative impact of a supply disruption.
Modular architecture is expressed in the following Fig.3 in conjunction with a fridge case: Fig.3 Features of Modular Architecture Then comes to the detailed design of concrete module variants, and all essential module data shall be incorporated into CAD modeling environment for the preparation of module and interface design.
Online since: April 2012
Authors: Guang Ming Zhang, Qian Qing Shen
The results showed that catalysts improved the THMsFP reduction efficiency by around 18% for BAC step and reduced the effluent bromate by 20%-77%; reduced NH4-N to below 1 mg/L; The effluent COD met the national standard under all circumstances.
In this paper, pilot study was proceeded in order to supply reliable data and experience for productive application in serious source water.
Because of adsorption and reduction of surface reducing group on activated carbon, effluent BrO3- dropped to 5 μg/L and 8.3 μg/L respectively.
Online since: July 2012
Authors: Xue Ao Zhang, Sheng Li Chang, Wei Luo, Fei Wang, Zheng Zheng Shao, Jing Yue Fang, Shi Qiao Qin
Nearly monodisperse Au NPs with mean diameters of 2-6 nm are acquired via the reduction of HAuCl4 by NaBH4 in the presence of tri-n-octyl amine and dodecanethiol in solvent of toluene.
Data for Gold Nanoparticles Num HAuCl4/Toluene (mmol/ml) NaBH4/Water (g/ml) Mean diam and Deviation (nm) a 20/10 0.020/ 0.5 2.2±1.25(56.8%) b 20/10 0.010/ 1 2.0±0.75(37.5%) c 20/10 0.0025/ 1 7.6±6.81(89.6%) Figure 1 shows TEM images and UV-vis spectra of Au NPs prepared by varing concentration of the reducing agent.
Generally, increasing temperature can accelerate the solution diffusion and the reduction of gold ions because molecular collision frequency increases.
As chance for Au atoms aggregating is in corresponding with the speed of the reduction, the mean particle size grows with the increase of the reduction speed.
Online since: July 2013
Authors: Duo Sheng Li, Ai Hua Zou, Xiao Zhen Hua, Xian Liang Zhou, Yu Long Que
This study shows that the smaller pores contained in the composite results in sharp reduction of thermal conductivity, when the porosity is up to 2.66 vol.%, the thermal conductivity of composite is found to decrease by about 9.02%.
On comparison, the results obtained from the FEA are closer to the measured values of effective thermal conductivity for composites with low porosity (roughly below 6%), when exceeding this value, the FEM predictions are slightly higher than experimental data.
And the other possible reason is that the pores congregate preferentially to the interfaces between Al and SiCp, which lead to a marked reduction of the interfacial bonding and introduces additional thermal barriers, resulting in the reduction for the measured composite conductivity.
FEA shows that the pores contained in the composite results in sharp reduction of thermal conductivity.
Online since: May 2007
Authors: Shae K. Kim
Driven largely by the never ending quest for weight reduction to decrease fuel consumption and emission, the automotive industry is predicting significant growth in the use of aluminum alloys.
This is important both in environmental point of view and in commercial point of view, because the environmental data are sensitive to the design of the cast part and the efficiency of the die casting operation.
Introduction Driven largely by the never ending quest for weight reduction to decrease fuel consumption and emission, the automotive industry is predicting significant growth in the use of aluminum alloys.
The process evaluated was based on yields of finished parts relative to the metal input with the emphasis to obtain life cycle inventory data, quantify environmental impacts and try to get solutions for environmental improvement.
In this study, LCA was carried out to evaluate the potential environmental impact of cold chamber type die casting process for aluminum alloys by the function unit of 1kg aluminum components based on 1 year life cycle inventory (LCI) data collection.
Online since: June 2012
Authors: Soo Ryong Kim, Woo Teck Kwon, Young Hee Kim, Eun Jin Jung, Yoon Joo Lee, Se Young Choi
FT-IR data of phenolic resin Figure 3.
TG data of the phenolic resin Table 1.
Scanning electron microscopy data show the shape and size of the β-SiC powders produced from different C/Si ratios.
SEM data of the β-SiC powders synthesized with the amount of phenolic resin was (a) 24 g, (b) 26 g, and (c) 28 g in 100 ml TEOS Table 2.
The Chemical analysis data of β-SiC powders synthesized at 1800 °C under Ar atmosphere Precursor Chemical analysis data (wt %) TEOS Novolac SiC Free-C Silicon SiO2 Free Si 100ml 24 98.9 0.03 0.41 0.52 26 98.4 0.08 0.30 1.18 28 97.9 0.77 0.25 1.08 The result of the chemical analysis, regarding the C/Si ratio effect to formation of β-SiC powders, is listed in Table 2.
Online since: November 2016
Authors: Stefan Becker, Sven Münsterjohann, Florian Zenger
The current work addresses both tasks: improvement of the efficiency and reduction of noise emission.
The current work addresses both tasks: the reduction of noise emission and improvement of the hydraulic efficiency.
Sound power levels were calculated from data of the seven microphones.
Skewed blades in low pressure fans: a survey of noise reduction mechanisms.
Reduction of airfoil turbulence-impingement noise by means of leading-edge serrations and/or porous materials.
Online since: November 2005
Authors: Élson de Campos, Carlos Roberto Grandini, F.P. Santos, R.L.N. Oliveira, Rogério Pinto Mota
The results shown a reduction in the elasticity modulus with the increase in the corn starch content used for this consolidation. 1.
Results and Discussion Table 1 shows a reduction of the apparent density with the increase of the corn starch.
TiO2 with corn starch Property 15% 25% 35% 45% Apparent density (g/cm 3 ) 3.57 3.27 2.90 2.56 Apparent porosity (%) 7.35 13.69 29.20 37.70 Water absorption (%) 2.05 4.20 10.10 14.70 Reduction after burning (%) 12.70 14.90 17.30 21.90 Densification (%) 84.00 76.90 68.20 60.20 Table 2 - Measures of superficial roughness, in that Ra is medium superficial roughness, Rt is the total superficial roughness and R3z is the medium superficial roughness of the third peak and depression.
We can observe in the figure a reduction of elasticity modulus with the increase of corn starch content.
Sample was attacked thermally at 1100ºC after polishing; (b) data obtained by image analysis using the IMAGE-PRO PLUS software. 100 200 300 400 500 0,90 0,95 1,00 TiO2 + corn starch T (K) f/f0 15% 25% 35% 45% Figure 3 - Elasticity modulus of TiO2 with corn starch.
Online since: September 2013
Authors: Y.G. Xu, Andreas Chrysanthou, Z. Shen
A major concern to the effective use of composite laminates is the substantial reduction in the compressive strength when the contact force has exceeded the delamination threshold load (DTL).
The further application is however restricted by the susceptibility of current carbon-fibre/epoxy system to low velocity impact (LVI) damage, which may cause enormous strength reduction [1-4].
QSI tests can significantly reduce the number of samples in getting the contact force/dent depth data.
This phenomenon can be linked to the global stiffness reduction triggerd by the cumulative damage from previous stage.
The reduction in global stiffness makes the laminate more flexible which will increase the contact area between the indenter under the same dent depth.
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