Development of in-situ Passivation System for High Efficiency and Long Lifetime of Flexible OLED Display

Polysulfone membranes exhibit resistance to high temperature with low manufacturing cost and high efficiency in the separation process. The composition of gases is an important step that estimates the efficiency of separation in membranes. As membrane types are currently becoming in demand for CO2/CH4 segregation, polysulfone will be an advantageous alternative to have in further studies. Therefore, research is undertaken in this study to evaluate two solvents: chloroform (CF) and tetrahydrofuran (THF). These solvents are tested for casting polymeric membranes from polysulfone (PSF) to separate every single component from a binary gas mixture of CO2/CH4. In addition, the effect of gas pressure was conducted from 1 to 10 bar on the behavior of the permeability and selectivity. The results refer to the fact that the maximum permeability of CO2 and CH4 for THF is 62.32 and 2.06 barrer at 1 and 2 bars, respectively. Further, the maximum permeability of CF is 57.59 and 2.12 barrer at 1 and 2 bars, respectively. The outcome selectivity values are 48 and 36 for THF and CF at 1 bar, accordingly. Furthermore, the study declares that with the increase in pressure, the permeability and selectivity values drop for CF and THF. The performance for polysulfone (PSF) membrane that is manufactured with THF is superior to that of CF relative to the Robeson upper bound. Therefore, through the results, it can be deduced that the solvent during in-situ synthesis has a significant influence on the gas separation of a binary mixture of CO2/CH4.

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Electrostatic potential dispersing pyrimidine-5-carbonitrile acceptor for high efficiency and long lifetime thermally activated delayed fluorescence organic light-emitting diodes

Journal of Materials Chemistry C ◽

10.1039/c9tc04304g ◽

2019 ◽

Vol 7 (40) ◽

pp. 12695-12703 ◽

Cited By ~ 2

Author(s):

Ji Seon Jang ◽

Ha Lim Lee ◽

Kyung Hyung Lee ◽

Jun Yeob Lee

Keyword(s):

Electrostatic Potential ◽

High Efficiency ◽

Delayed Fluorescence ◽

Organic Light Emitting Diodes ◽

Thermally Activated Delayed Fluorescence ◽

Light Emitting ◽

Thermally Activated ◽

Organic Light ◽

Long Lifetime ◽

Acceptor Moiety

Pyrimidine-5-carbonitrile was developed as an electrostatic potential managing and strong acceptor moiety of thermally activated delayed fluorescent (TADF) emitters for high efficiency and long lifetime in devices.

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Study on Mechanical Automation with Design of Rapid Milk Detector Based on Freezing Point

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.703.282 ◽

2013 ◽

Vol 703 ◽

pp. 282-286

Author(s):

Ren Cai Zhang ◽

Xiang Yu ◽

Xing Ju Liu ◽

Jin Hai Zhai ◽

Zhen Wu Ning

Keyword(s):

Integrated Circuit ◽

Temperature Sensor ◽

High Efficiency ◽

Freezing Point ◽

Electronic Control ◽

Freezing Point Depression ◽

Electronic Control System ◽

Freezing Curve ◽

Rack Mechanism

An efficient automated milk detector based on freezing point depression is designed. This detector shares characters of high efficiency and good stability with accuracy and automation. Its main parts include temperature sensor of IC (Integrated Circuit), pinion-rack mechanism and crank-rocker mechanism and electronic control system. Monitoring in-situ change of milk freezing curve and developing efficiency of sampling can be available by means of pinion-rack mechanism and IC temperature sensor mechatronics design. As a result, adulterating status of milk can be discriminated in a rapid and accurate and automated way. The detector may be employed to detect liquid foods other than milk as well.

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Separation of phenols from oils using deep eutectic solvents and ionic liquids

Pure and Applied Chemistry ◽

10.1515/pac-2019-1119 ◽

2020 ◽

Vol 92 (10) ◽

pp. 1717-1731

Author(s):

Yucui Hou ◽

Zhi Feng ◽

Jaime Ruben Sossa Cuellar ◽

Weize Wu

Keyword(s):

Ionic Liquids ◽

Phenolic Compounds ◽

High Efficiency ◽

Deep Eutectic Solvents ◽

Environmentally Benign ◽

Organic Chemical ◽

Environmental Friendliness ◽

Oil Mixtures ◽

Organic Chemical Industry

AbstractPhenolic compounds are important basic materials for the organic chemical industry, such as pesticides, medicines and preservatives. Phenolic compounds can be obtained from biomass, coal and petroleum via pyrolysis and liquefaction, but they are mixtures in oil. The traditional methods to separate phenols from oil using alkaline washing are not environmentally benign. To solve the problems, deep eutectic solvents (DESs) and ionic liquids (ILs) have been developed to separate phenols from oil, which shows high efficiency and environmental friendliness. In this article, we summarized the properties of DESs and ILs and the applications of DESs and ILs in the separation of phenols and oil. There are two ways in which DESs and ILs are used in these applications: (1) DESs formed in situ using different hydrogen bonding acceptors including quaternary ammonium salts, zwitterions, imidazoles and amides; (2) DESs and ILs used as extractants. The effect of water on the separation, mass transfer dynamics in the separation process, removal of neutral oil entrained in DESs, phase diagrams of phenol + oil + extractant during extraction, are also discussed. In the last, we analyze general trends for the separation and evaluate the problematic or challenging aspects in the separation of phenols from oil mixtures.

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Preliminary Positron Lifetime Results on Free Volumes in Cyclodextrins

Materials Science Forum ◽

10.4028/www.scientific.net/msf.666.99 ◽

2010 ◽

Vol 666 ◽

pp. 99-102 ◽

Cited By ~ 3

Author(s):

Maria Fatima Ferreira Marques ◽

A.M.G. Moreira Da Silva ◽

P.M. Gordo ◽

Z. Kajcsos

Keyword(s):

Positron Annihilation ◽

Free Volume ◽

Positron Lifetime ◽

Positron Annihilation Lifetime Spectroscopy ◽

Positron Source ◽

Lifetime Component ◽

Positron Annihilation Lifetime ◽

Long Lifetime

Positron annihilation lifetime spectroscopy was used to study the free-volume parameters in various pure -, - and -cyclodextrins samples and, in the case of β-cyclodextrin, with inclusion of S-carvone and thymoquinone. The results clearly indicate the presence of long lifetime components related to Ps-formation. The data show that the addition of S-carvone to β-cyclodextrin results in a decrease of o-Ps lifetime that we ascribe to a reduction of free volume holes from 81.8 to 63.7 Å3. The long lifetime component disappears when thymoquinone is added to -cyclodextrin, indicating this substance acts as an o-Ps quencher. For all samples studied, a decrease in the long lifetime component values was observed with increasing source in situ time, a result that might be attributed to the irradiation of the sample by the 22Na positron source.

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