35 research outputs found
Composing Elements and Kinematics Simulation of Three Gear-Plates Planet Drive with Small Teeth Difference Used in Robot
No full textDendrimer-Based Demulsifiers for Polymer Flooding Oil-in-Water Emulsions
No full textTwo polyamidoamine-based dendritic molecules, named here as benzyl-G3 and octyl-G3, were synthesized using H2NCH2CH2NRCH2CH2NH2 (where R is either rigid benzyl or flexible octyl hydrophobic tails that are linked to the central nitrogen atom). With consideration of factors, such as the settling time, demulsifier dosage, temperature, oil content, and kinds of surfactants, the synthesized molecules were systematically investigated as demulsifiers for breaking up polymer flooding oil-in water emulsions. In comparison to traditional G3 polyamidoamine, both benzyl-G3 and octyl-G3 exhibited better demulsification efficiencies with a dosage of 200 mg/L at a relatively low temperature (30 degrees C) in short periods of time (40 min) and reached 99.3 and 99.8% oil removal rates as they were added to the low oil-containing emulsion (1500 mg/L), respectively. A series of measurement methods were then adopted to explore the demulsification mechanism of the two demulsifiers. The interfacial tension and zeta potential measurements indicated that the high demulsification efficiency of the two dendrimers could be due to electrostatic charge neutralization. Moreover, the dendrimers and surfactants showed strong interactions according to the turbidity measurements, the results of which demonstrated that the hydrophobic tails located at the center of the dendrimers also influenced the demulsification efficiency.National Natural Science Foundation of China [21274004]SCI(E)ARTICLE55395-54013
A combination of direct cell count and fluorescein diacetate hydrolysis to evaluate the viability of algae cell
No full textAnionic metal-organic frameworks lead the way to eco-friendly high-energy-density materials
No full textTo develop environmentally friendly high-energy-density materials with outstanding detonation performances, anionic metal-organic frameworks (anionic MOFs) are introduced into the area of energetic materials. In this work, two anionic complexes, [(AG)(3)(Co(btm)(3))] (1) and {[(AG)(2)(Cu(btm)(2))]}(n)(2) (H(2)btm = bis(tetrazole)methane, AG = aminoguanidinium), have been prepared and characterized by single-crystal X-ray diffraction analysis. Theoretical analyses predict that these two anionic energetic MOFs should show extensive hydrogen bonding with remarkably high nitrogen contents, good thermal stabilities, favorable insensitivities, and excellent detonation performances, and this has been confirmed by experimental results. Notably, the heats of detonation of 1 (4.75 kcal g(-1)) and 2 (5.41 kcal g(-1)) are far superior to those of all hitherto reported MOF-based high-energy-density materials.SCI(E)[email protected]
Correlation between CT features of adrenocortical and adrenal medullary tumors and expression of miR‑96 in serum
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Design and Experimental Validation of Swirl Recovery Vanes for Propeller Propulsion Systems
No full textFlight Performance and PropulsionAerospace EngineeringWind Energ
Author Correction: Selective synaptic remodeling of amygdalocortical connections associated with fear memory
No full textAg-Grid and Ag-Nanowires Hybrid Transparent Electrodes to Improve Performance of Flexible Organic Light-Emitting Devices
No full textFlexible transparent conductive electrodes, with high optical transmittance, electrical conductivity, and flexible stability, still challenge the commercial development of flexible organic light-emitting devices (OLEDs). In this work, a novel Ag-grid and Ag-nanowire (Ag-grid/AgNW) hybrid transparent conductive film was proposed with extraordinary optoelectronic and mechanical performance. The hybrid film exhibited a low resistivity of 9 Ω/sq and a high transparency of 67.9% at the wavelength of 550 nm, as well as outstanding mechanical robustness by surviving over 5000 bending cycles. By applying the proposed Ag-grid/AgNW hybrid electrode in flexible OLEDs, the electroluminescence performance, flexibility, and mechanical reliability of the devices were significantly improved
