Qiu X.-L.,Jiangnan University |
Qiu X.-L.,Antek |
Tang G.-Y.,Tsinghua University |
Song G.-L.,Tsinghua University |
Han P.-J.,Jiangnan University
Xiandai Huagong/Modern Chemical Industry | Year: 2016
Microencapsulation of n-octadecane is carried out to prepare microencapsulated phase change material (MicroPCMs) by using poly(stearyl methacrylate) (PSMA) and poly(stearyl methacrylate-co-methacrylic acid) poly(SMA-co-MAA) as capsule shells, respectively. The surface morphology of MicroPCMs is determined by scanning electron microscopy (SEM). The thermal property and thermal stability are investigated by differential scanning calorimetry (DSC) and thermal gravimetric analysis (TG). The long alkyl chain of SMA provides the capsule shell with the ability to withstand external force owing to its elastic deformation property. In comparison with (PSMA), poly(SMA-co-MAA) based shell has a smoother and more compact surface and a narrower particle size distribution by the introduction of MAA. The corresponding MicroPCMs also has a higher melting enthalpies of 136.0 J/g. The thermal resistant temperature is increased by over 60℃ as well. Therefore, microencapsulated n-octadecane with SMA-based polymer as shell has good thermal energy storage and thermal regulation potential. © 2016, China National Chemical Information Center. All right reserved.
Bittner Z.S.,Rochester Institute of Technology |
Spencer S.,Rochester Institute of Technology |
Terrinoni A.,Antek |
Hubbard S.M.,Rochester Institute of Technology
Conference Record of the IEEE Photovoltaic Specialists Conference | Year: 2013
In this study, work is presented towards Sili-con/Polyaniline (PAni) hybrid solar cell development. An external quantum efficiency (EQE) integrated short-circuit current density (Jsc) of up to 22.96 mA/cm2 was measured, while AM1.5G IV measured Jsc peaked at 6.31 mA/cm 2, an open circuit voltage (Voc) of 469.4 mV was measured, and an overall AM1.5G device efficiency of 0.725% despite high grid shadowing of > 50% and highly resistive contacts. Rectifying behavior was also seen in Silicon/Poly(3,4-ethylenedioxythiopene)-poly(styrenesulfonate) devices, achieving VOC values of up to 411 mV. © 2013 IEEE.
Cortes J.E.,Antek |
Munoz L.F.,Hocol S.A. |
Gonzalez C.A.,Antek |
Nino J.E.,Antek |
And 6 more authors.
Journal of Hydrology | Year: 2016
A wide variety of hydrogeochemical data were obtained through the analysis of the formation water samples collected from 118 producing wells from the San Francisco Oilfield (SFO) in the Upper Magdalena Valley (UMV) basin, Huila, Colombia. The study area is composed of deposited sandstone in fluvial-lacustrine marine environment, which characterized the formation waters as chloride-sodium water type.The brackish-saline facies identified can be attributed to evaporation, halite and dolomite dissolution along with water recharge of meteoric waters somewhere in the basin, probably from Magdalena River, the contribution of the SFO injection water system and significantly by the rock-water interaction. Some ionic ratios were used to confirm clearly that water-rock interactions play a significant role in the evolution of the hydrogeochemistry process in the SFO. The charge balance error ranges between -5.88% and 2.62% indicating very well balanced and mature water for blocks 1, 2 and 3 (north part of the field), and partially equilibrated and immature waters for blocks 4, 5, 6, 7, and 8 as is confirmed by Piper, Giggenbach, and Schöeller diagrams. Calculated scale and stability indices (Langelier, Ryznar, and Puckorius), besides halite and dolomite indexes, indicate that these formation waters are slightly saturated with respect to the calcite and dolomite and have strong tendency to the scale formation as well.Concentration maps were used to identify the geological factors that could have influenced its chemical composition and the hydrogeochemical processes involved in the field, such as halite dissolution, calcite or dolomite precipitation and cationic exchange reactions. The mineralogical distribution leads to the conclusion that the halite dissolution is mostly distributed in the Northeastern area of the SFO between B1, B3, B4, B5, and B6 blocks, the dolomite and calcite have greater concentrations between B5 and B6 blocks. The dissolved minerals followed the trend halite > calcite > dolomite > silvite.HCA gives two main clusters divided in six water classes, while PCA explains near of 48.85% of the variance in the samples. CP1 explains 25.74% of the correlation between variables and factors revealing a high positive loading for electrical properties and cations. This factor may be related with the high dissolution of halite (marine environment) caused by the intensive flushing of the rock formation. CP2 explains the 13.15% of the data showing a good correlation between alkalinity parameters. CP3 explain the 10%, which establishes a good negative correlation for pH, and positive correlation between iron, zinc, and ammonia. © 2016 Elsevier B.V.
Agency: Department of Defense | Branch: Army | Program: STTR | Phase: Phase I | Award Amount: 99.99K | Year: 2010
The objective of the proposed research is to develop a portable, passive system for rapid and efficient blood component separation. While a number of macro-scale devices are routinely employed in laboratory settings to separate, for example, red blood cells (RBCs) from platelet-rich plasma (PRP), and an emerging class of microfabricated devices are slowly being developed to address various low-throughput, point-of-care applications, we propose a straightforward “mesoscopic” solution to reliably separate a unit of undiluted whole blood into RBCs, platelets, and plasma in under one hour.
Agency: Department of Defense | Branch: Army | Program: STTR | Phase: Phase II | Award Amount: 749.83K | Year: 2012
The objective of this project is to develop a portable, passive system for rapid and efficient blood component separation. While a number of macroscale devices (based on centrifugation) are routinely employed in laboratory settings to separate red blood cells (RBCs) and platelets from plasma, they are bulky, expensive, labor-intensive, and can compromise cellular integrity. An emerging class of microfabricated devices are being developed to address a variety of point-of-care style applications, but they are only capable of processing low-volume and/or extremely dilute blood samples. To address the practical limitations of both approaches, we have developed a straightforward"mesoscopic"solution to reliably separate a unit of undiluted whole blood into RBCs, platelets, and plasma within the same amount of time as conventional techniques, but with reduced energy requirements and cellular damage.
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