Highly penetrant organic solvent-resistant layer-by-layer assembled ultra-thin barrier coating for confined microchannel devices

2021 ◽  
pp. 109537
Author(s):  
Sunghwan Hong ◽  
Seong Soo Yoo ◽  
Gwan Hyun Choi ◽  
Jun Hyuk Lee ◽  
Yong-Woo Choi ◽  
...  
Keyword(s):  
Organic Solvent ◽  
Layer By Layer ◽  
Barrier Coating ◽  
Resistant Layer ◽  
Microchannel Devices ◽  
Thin Barrier

Multi-Layered Thermal Barrier Coating for Land-Based Gas Turbines

1997 ◽  
Author(s):  
M. Tamura ◽  
M. Takahashi ◽  
J. Ishii ◽  
K. Suzuki ◽  
M. Sato ◽  
...  
Keyword(s):  
Gas Turbines ◽  
Thermal Cycle ◽  
Thermal Barrier ◽  
Barrier Coatings ◽  
Oxidation Layer ◽  
High Durability ◽  
Barrier Coating ◽  
Oxidation Resistant ◽  
Resistant Layer ◽  
Coating Stress

Abstract Multi-layered thermal barrier coatings (TBC) having different functions were proposed for the hot section components of land-based gas turbines. This paper describes the multi-layered TBC with an oxidation resistant layer. A conventional duplex TBC and a triplex TBC, in which an aluminized layer was added to the conventional duplex TBC to increase oxidation resistance, was prepared. It was confirmed by a burner rig test that the triplex TBC with the aluminized layer is resistant to oxidation and shows high durability in a thermal cycle test, compared with the conventional duplex TBC. The spalling in the thermal cycle test of each TBC specimen occurred at the same position and when the thickness of the oxidation layer was 11-13 μm. The mechanism of spalling of the coating in the thermal cycle test was discussed in terms of stress in the coating. Stress in the direction of spalling occurs by an uneven interface between the bond coat and top coat, and increases with growth of the oxidation layer. It is thought that the high durability of the triplex TBC in the thermal cycle test is derived from suppressing the growth of the oxidation layer and decreasing the stress due to the addition of the aluminized layer.

scholarly journals Crosslinked Carbon Nano Dots Membranes for Organic Solvent Nanofiltration

2021 ◽  
Author(s):  
Mahsa Abbaszadeh ◽  
Andrew Atkinson ◽  
Kevin Trinh ◽  
Santanu Kundu
Keyword(s):  
Molecular Weight ◽  
Organic Solvent ◽  
Organic Solvents ◽  
Active Layer ◽  
Uv Light ◽  
Layer By Layer ◽  
Facile Synthesis ◽  
Long Duration ◽  
Synthesis Strategy ◽  
Organic Solvent Nanofiltration

We report a facile synthesis strategy of a membrane active layer consisting of crosslinked carbon nano dots through a layer-by-layer process and the application of these membranes in organic solvent nanofiltration. The synthesized membrane is stable in organic solvents for a long duration, displays tight molecular weight cut off, and fluoresces under UV light, allowing one to capture mechanical failure.

scholarly journals Reducing Water Vapor Permeability of Poly(lactic acid) Film and Bottle through Layer-by-Layer Deposition of Green-Processed Cellulose Nanocrystals and Chitosan

2015 ◽  
Vol 2015 ◽  
pp. 1-6 ◽  
Author(s):  
Katalin Halász ◽  
Yanin Hosakun ◽  
Levente Csóka
Keyword(s):  
Lactic Acid ◽  
Cellulose Nanocrystals ◽  
Self Assembly ◽  
Water Vapor Permeability ◽  
Barrier Properties ◽  
Poly Lactic Acid ◽  
Vapor Permeability ◽  
Layer By Layer ◽  
Barrier Coating ◽  
Assembly Technique

Layer-by-layer electrostatic self-assembly technique was applied to improve the barrier properties of poly(lactic acid) (PLA) films and bottles. The LbL process was carried out by the alternate adsorption of chitosan (CH) (polycation) and cellulose nanocrystals (CNC) produced via ultrasonic treatment. Four bilayers (on each side) of chitosan and cellulose nanocrystals caused 29 and 26% improvement in barrier properties in case of films and bottles, respectively. According to the results the LbL process with CH and CNC offered a transparent “green” barrier coating on PLA substrates.

scholarly journals Organic Solvent-Based Graphene Oxide Liquid Crystals: A Facile Route toward the Next Generation of Self-Assembled Layer-by-Layer Multifunctional 3D Architectures

ACS Nano ◽  
2013 ◽  
Vol 7 (5) ◽  
pp. 3981-3990 ◽  
Author(s):  
Rouhollah Jalili ◽  
Seyed Hamed Aboutalebi ◽  
Dorna Esrafilzadeh ◽  
Konstantin Konstantinov ◽  
Simon E. Moulton ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Liquid Crystals ◽  
Organic Solvent ◽  
Layer By Layer ◽  
Next Generation ◽  
Self Assembled ◽  
Self Assembled Layer ◽  
Facile Route

A Novel Synthesis of Bioactive Catechols by Layer-by-Layer Immobilized Tyrosinase in an Organic Solvent Medium

ChemCatChem ◽  
2011 ◽  
Vol 4 (1) ◽  
pp. 89-99 ◽  
Author(s):  
Melissa Guazzaroni ◽  
Marina Pasqualini ◽  
Giorgia Botta ◽  
Raffaele Saladino
Keyword(s):  
Organic Solvent ◽  
Layer By Layer ◽  
Solvent Medium ◽  
Novel Synthesis

scholarly journals Crosslinked Carbon Nano Dots Membranes for Organic Solvent Nanofiltration

2021 ◽  
Author(s):  
Mahsa Abbaszadeh ◽  
Andrew Atkinson ◽  
Kevin Trinh ◽  
Santanu Kundu
Keyword(s):  
Molecular Weight ◽  
Organic Solvent ◽  
Organic Solvents ◽  
Active Layer ◽  
Uv Light ◽  
Layer By Layer ◽  
Facile Synthesis ◽  
Long Duration ◽  
Synthesis Strategy ◽  
Organic Solvent Nanofiltration

We report a facile synthesis strategy of a membrane active layer consisting of crosslinked carbon nano dots through a layer-by-layer process and the application of these membranes in organic solvent nanofiltration. The synthesized membrane is stable in organic solvents for a long duration, displays tight molecular weight cut off, and fluoresces under UV light, allowing one to capture mechanical failure.

Slippery Liquid-Infused Porous Surfaces (SLIPS) Using Layer-by-Layer Polyelectrolyte Assembly in Organic Solvent

Langmuir ◽  
2018 ◽  
Vol 34 (16) ◽  
pp. 4722-4731 ◽  
Author(s):  
Geyunjian H. Zhu ◽  
Szu-Hao Cho ◽  
Huan Zhang ◽  
Mengmeng Zhao ◽  
Nicole S. Zacharia
Keyword(s):  
Organic Solvent ◽  
Layer By Layer ◽  
Porous Surfaces

Modification of the Curing Characteristics of the Photocurable Resin FA1260T for 3D Microfabrication Using Microstereolithography

2006 ◽  
Vol 326-328 ◽  
pp. 107-110 ◽  
Author(s):  
Sung Hoon Kim ◽  
Dae Jun Jung ◽  
Jae Young Joo ◽  
Sung Ho Jeong
Keyword(s):  
Organic Solvent ◽  
Liquid Surface ◽  
Laser Light ◽  
Three Dimensional ◽  
Layer By Layer ◽  
Critical Factors ◽  
Abrupt Increase ◽  
Curing Characteristics ◽  
Visible Laser

The curing characteristics of a photocurable resin are critical factors that often decide the ultimate resolution and structural sharpness of a final product fabricated by microstereolithography (μ-STL). In this study, we investigated the curing characteristics of the FA1260T photopolymer under a visible laser light of 442nm wavelength. Modification of the curing property of the FA1260T is attempted to reduce the cure depth (Dc) by adding a radical quencher to the resin. Also, an organic solvent was used to reduce the resin viscosity for an improvement of the flatness of the liquid surface during layer-by-layer curing. As a result, the minimum Dc has been reduced over a factor of 3 with no abrupt increase. Samples of three dimensional microstructures fabricated using the modified FA1260T are presented.

scholarly journals Preparation and Thermal Shock Resistance of Gd2O3 Doped La2Ce2O7 Thermal Barrier Coatings

Coatings ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 1186
Author(s):  
Lihua Gao ◽  
Fang Jia ◽  
Xiaoliang Lu
Keyword(s):  
Thermal Shock ◽  
Thermal Barrier Coating ◽  
Thermal Shock Resistance ◽  
Atmospheric Plasma ◽  
Ceramic Layer ◽  
Thermal Barrier ◽  
Spray Parameters ◽  
Layer By Layer ◽  
Barrier Coating ◽  
Shock Resistance

As one of the promising thermal barrier coating (TBC) candidates, stoichiometric (La0.8Gd0.2)2Ce2O7 (LGC) coatings were prepared by atmospheric plasma spraying (APS), using (La0.8Gd0.2)2Ce2.5O8 as a spray powder and optimized spray parameters. It was found that spray distance and spray power both play an important role in the phase composition and microstructure of the coating. The LGC coating exhibited lower thermal conductivities than that of La2Ce2O7 (LC) coating, which is ~0.67 W/m·K at 1200 °C. Double-ceramic-layer (DCL) optimum (La0.8Gd0.2)2Ce2O7/YSZ (LGC/YSZ) thermal barrier coating was prepared and its thermal shock behavior was investigated. The LGC/YSZ DCL TBCs had better thermal shock resistance ability than that of LC/YSZ TBCs, which was around 109 cycles at 1100 °C. However, the failure mode was similar to that of LC/YSZ DCL TBCs, which was still layer-by-layer spallation in the top ceramic layer due to the sintering of the ceramic coating.

Microstructural characterization of CoPtCr/Cr thin film disks by cross-section TEM and elongated probe micro-diffraction

1991 ◽  
Vol 49 ◽  
pp. 762-763
Author(s):  
M.A. Parker ◽  
K.E. Johnson ◽  
C. Hwang ◽  
A. Bermea
Keyword(s):  
Magnetic Recording ◽  
Electron Probe ◽  
Microstructural Characterization ◽  
Crystallographic Structure ◽  
Recording Media ◽  
Layer By Layer ◽  
Cross Sectional ◽  
New Techniques ◽  
Polished Side

We have reported the dependence of the magnetic and recording properties of CoPtCr recording media on the thickness of the Cr underlayer. It was inferred from XRD data that grain-to-grain epitaxy of the Cr with the CoPtCr was responsible for the interaction observed between these layers. However, no cross-sectional TEM (XTEM) work was performed to confirm this inference. In this paper, we report the application of new techniques for preparing XTEM specimens from actual magnetic recording disks, and for layer-by-layer micro-diffraction with an electron probe elongated parallel to the surface of the deposited structure which elucidate the effect of the crystallographic structure of the Cr on that of the CoPtCr.XTEM specimens were prepared from magnetic recording disks by modifying a technique used to prepare semiconductor specimens. After 3mm disks were prepared per the standard XTEM procedure, these disks were then lapped using a tripod polishing device. A grid with a single 1mmx2mm hole was then glued with M-bond 610 to the polished side of the disk.

Sign in / Sign up

Export Citation Format

Share Document