Suppressing Self-Discharge of Vanadium Diboride by Zwitterionicity of the Polydopamine Coating Layer

2019 ◽  
Vol 11 (5) ◽  
pp. 5123-5128 ◽  
Author(s):  
Fanqi Wang ◽  
Meifen Wu ◽  
Tao Zhang ◽  
Zhaoyin Wen
Keyword(s):  
Coating Layer ◽  
Vanadium Diboride

A method for measuring the in-plane compressive strength and the compression behavior of coating layers

TAPPI Journal ◽  
2011 ◽  
Vol 10 (7) ◽  
pp. 29-34
Author(s):  
TEEMU PUHAKKA ◽  
ISKO KAJANTO ◽  
NINA PYKÄLÄINEN
Keyword(s):  
Tensile Strength ◽  
Compressive Strength ◽  
Calcium Carbonate ◽  
Coating Layer ◽  
Test Methods ◽  
Coating Films ◽  
Precipitated Calcium Carbonate ◽  
Coating Color ◽  
Mineral Coatings ◽  
Styrene Butadiene

Cracking at the fold is a quality defect sometimes observed in coated paper and board. Although tensile and compressive stresses occur during folding, test methods to measure the compressive strength of a coating have not been available. Our objective was to develop a method to measure the compressive strength of a coating layer and to investigate how different mineral coatings behave under compression. We used the short-span compressive strength test (SCT) to measure the in-plane compressive strength of a free coating layer. Unsupported free coating films were prepared for the measurements. Results indicate that the SCT method was suitable for measuring the in-plane compressive strength of a coating layer. Coating color formulations containing different kaolin and calcium carbonate minerals were used to study the effect of pigment particles’ shape on the compressive and tensile strengths of coatings. Latices having two different glass transition temperatures were used. Results showed that pigment particle shape influenced the strength of a coating layer. Platy clay gave better strength than spherical or needle-shaped carbonate pigments. Compressive and tensile strength decreased as a function of the amount of calcium carbonate in the coating color, particularly with precipitated calcium carbonate. We also assessed the influence of styrene-butadiene binder on the compressive strength of the coating layer, which increased with the binder level. The compressive strength of the coating layer was about three times the tensile strength.

Impact of high temperature and soft nip calendering on the pore structure of the coating layer

2002 ◽  
Vol 17 (2) ◽  
pp. 147-152 ◽  
Author(s):  
Magnus Wikström ◽  
Mikael Bouveng ◽  
Mikael Rigdahl ◽  
Anthony G. Hiorns
Keyword(s):  
High Temperature ◽  
Pore Structure ◽  
Coating Layer

A MICROMETER THICK COATING LAYER SLOWING THE WEATHERING RATE OF GLACIAL POLISH

2017 ◽  
Author(s):  
Shalev Siman-Tov ◽  
◽  
Greg M. Stock ◽  
Emily E. Brodsky ◽  
Joseph Clancy White
Keyword(s):  
Coating Layer ◽  
Weathering Rate ◽  
Thick Coating

SILICATE CHEMICAL WEATHERING BENEATH GLACIERS RECORDED BY THE COATING LAYER OF GLACIAL POLISH

2018 ◽  
Author(s):  
Terrence Blackburn ◽  
◽  
Shalev Siman-Tov ◽  
Emily E. Brodsky ◽  
Greg M. Stock ◽  
...  
Keyword(s):  
Chemical Weathering ◽  
Coating Layer

Study of Novel Fe-Based Amorphous/Nanocrystalline Soft Magnetic Powder Cores with NiCuZnFe2O4 Coating Layer

2021 ◽  
Author(s):  
Chaohan Zhang ◽  
Pingjun Tao ◽  
Kunsen Zhu ◽  
Yugan Chen ◽  
Weijan Zhang ◽  
...  
Keyword(s):  
Coating Layer ◽  
Magnetic Powder ◽  
Soft Magnetic

scholarly journals Mechanically Sustainable Starch-Based Flame-Retardant Coatings on Polyurethane Foams

Polymers ◽  
2021 ◽  
Vol 13 (8) ◽  
pp. 1286
Author(s):  
Kyung-Who Choi ◽  
Jun-Woo Kim ◽  
Tae-Soon Kwon ◽  
Seok-Won Kang ◽  
Jung-Il Song ◽  
...  
Keyword(s):  
Heat Release ◽  
Flame Retardant ◽  
Coating Layer ◽  
Real Life ◽  
Polyurethane Foams ◽  
Layer By Layer ◽  
Toxic Substances ◽  
Cone Calorimetry ◽  
Coating Agent ◽  
Cone Calorimeter Test

The use of halogen-based materials has been regulated since toxic substances are released during combustion. In this study, polyurethane foam was coated with cationic starch (CS) and montmorillonite (MMT) nano-clay using a spray-assisted layer-by-layer (LbL) assembly to develop an eco-friendly, high-performance flame-retardant coating agent. The thickness of the CS/MMT coating layer was confirmed to have increased uniformly as the layers were stacked. Likewise, a cone calorimetry test confirmed that the heat release rate and total heat release of the coated foam decreased by about 1/2, and a flame test showed improved fire retardancy based on the analysis of combustion speed, flame size, and residues of the LbL-coated foam. More importantly, an additional cone calorimeter test was performed after conducting more than 1000 compressions to assess the durability of the flame-retardant coating layer when applied in real life, confirming the durability of the LbL coating by the lasting flame retardancy.

scholarly journals Assessment of Mini-Tablets Coating Uniformity as a Function of Fluid Bed Coater Inlet Conditions

Pharmaceutics ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 746
Author(s):  
Magdalena Turk ◽  
Rok Šibanc ◽  
Rok Dreu ◽  
Maja Frankiewicz ◽  
Małgorzata Sznitowska
Keyword(s):  
Coating Layer ◽  
Spectrophotometric Analysis ◽  
Material Distribution ◽  
Spray Chamber ◽  
Colorimetric Analysis ◽  
Swirl Generator ◽  
Coating Uniformity ◽  
Fluid Bed ◽  
Inlet Conditions

This study concerned the quality of mini-tablets’ coating uniformity obtained by either the bottom spray chamber with a classical Wurster distributor (CW) or a swirl distributor (SW). Mini-tablets with a diameter of 2.0, 2.5, and 3.0 mm were coated with hypromellose using two different inlet air distributors as well as inlet airflow rates (130 and 156 m3/h). Tartrazine was used as a colorant in the coating layer and the coating uniformity was assessed by spectrophotometric analysis of solutions obtained after disintegration of the mini-tablets (n = 100). Higher uniformity of coating material distribution among the mini-tablets was observed in the case of SW distributor, even for the biggest mini-tablets (d = 3.0 mm), with an RSD no larger than 5.0%. Additionally, coating thickness was evaluated by colorimetric analysis (n = 1000), using a scanner method, and expressed as a hue value. A high correlation (R = 0.993) between inter-tablet variability of hue and UV-Vis results was obtained. Mini-tablets were successfully coated in a fluid bed system using both a classical Wurster distributor as well as a swirl generator. However, regardless of the mini-tablets’ diameter, better film uniformity was achieved in the case of a distributor with a swirl generator.

scholarly journals Efficient Lipid Bilayer Formation by Dipping Lipid-Loaded Microperforated Sheet in Aqueous Solution

Micromachines ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 53
Author(s):  
Nobuo Misawa ◽  
Satoshi Fujii ◽  
Koki Kamiya ◽  
Toshihisa Osaki ◽  
Shoji Takeuchi
Keyword(s):  
Aqueous Solution ◽  
Membrane Protein ◽  
Organic Solvent ◽  
Lipid Membrane ◽  
Coating Layer ◽  
Bilayer Lipid Membrane ◽  
Contact Method ◽  
Electrical Measurements ◽  
Droplet Interface Bilayer ◽  
Perforated Sheet

This paper describes a method for a bilayer lipid membrane (BLM) formation using a perforated sheet along with an open chamber. Microscopic observation of the formed membrane showed a typical droplet interface bilayer. We proved that the formed membrane was a BLM based on electrical measurements of the membrane protein α-hemolysin, which produces nanopores in BLMs. Unlike the conventional approach for BLM formation based on the droplet contact method, this method provides aqueous surfaces with no organic solvent coating layer. Hence, this method is suitable for producing BLMs that facilitate the direct addition of chemicals into the aqueous phase.

Enhancement of thermoelectric performance in non-toxic CuInTe2/SnTe coated grain nanocomposite

2021 ◽  
Author(s):  
Junphil Hwang ◽  
Minju Lee ◽  
Byung-Kyu Yu ◽  
Mi-Kyung Han ◽  
Woochul Kim ◽  
...  
Keyword(s):  
Grain Boundaries ◽  
Coating Layer ◽  
Thermoelectric Performance

Thermoelectric coated grain nanocomposites CuInTe2/SnTe with eco-friendly elements was synthesized. The nanocomposite contains a coating layer of CuInTe2 and SnO2 at the grain boundaries of the SnTe matrix. The coating...

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