Hydrophobic Surface Coating of Nanodiamonds by Polyglycerol‐Based Polymers with Alkyl Chains for Dispersing in an Organic Solvent

ChemNanoMat ◽  
2020 ◽  
Vol 6 (9) ◽  
pp. 1332-1336
Author(s):  
Wei Wang ◽  
Yajuan Zou ◽  
Alejandro López‐Moreno ◽  
Yujing Jiang ◽  
Feng Wen ◽  
...  
Keyword(s):  
Organic Solvent ◽  
Surface Coating ◽  
Hydrophobic Surface ◽  
Alkyl Chains

scholarly journals Front Cover: Hydrophobic Surface Coating of Nanodiamonds by Polyglycerol‐Based Polymers with Alkyl Chains for Dispersing in an Organic Solvent (ChemNanoMat 9/2020)

ChemNanoMat ◽  
2020 ◽  
Vol 6 (9) ◽  
pp. 1283-1283
Author(s):  
Wei Wang ◽  
Yajuan Zou ◽  
Alejandro López‐Moreno ◽  
Yujing Jiang ◽  
Feng Wen ◽  
...  
Keyword(s):  
Organic Solvent ◽  
Surface Coating ◽  
Hydrophobic Surface ◽  
Front Cover ◽  
Alkyl Chains

Microfluidic Device for Synthesis of Lipid Bi-Layers

2008 ◽  
Author(s):  
B. M. R. U. Banneyake ◽  
Debjyoti Banerjee
Keyword(s):  
Organic Solvent ◽  
Microfluidic Device ◽  
Single Channel ◽  
Hydrophobic Surface ◽  
Mirror Image ◽  
Buffer Solution ◽  
Pump System ◽  
Glass Substrates ◽  
Micro Channels ◽  
Cell Components

Lipid bi-layers are ubiquitous components of biological cells — and are found in variety of cell components ranging from cell membranes to membranes of organelles inside the cells. In biological membranes, lipid bi-layer membranes carry membrane proteins, which serve as single channel nanopores that are used to study transport of proteins and characterize the properties of proteins. However, lipid bi-layers have very short half lives, which are usually less than an hour. The lipid bi-layers are usually obtained by physico-chemical interactions between a lipid containing organic solvent, an aqueous buffer solution and a hydrophobic surface. We have developed a continuous flow through microfluidic device using pressure driven flow (by means of a tandem syringe pump system) for synthesis of lipid bi-layers. The microfluidic device consists of two glass substrates with micro-channels and microchambers microfabricated using photolithography and wet glass etching. The microchannels in each substrate is in the form of “+” shape and form a mirror image of each other. A Teflon sheet (∼200 microns thickness) is sandwiched between the glass substrates with a ∼200 microns diameter hole etched in the center to communicate with the two sets of microchannels. A lipid solution in an organic solvent (Pentane) and KCl buffer solution are alternately flown through the legs of the microchannel. The conductivity of the buffer is monitored using a current amplifier. The formation of the lipid bi-layer is confirmed by monitoring the resistivity and the impedance to high frequency electrical oscillations. The flow rate in the microfluidic device is optimized to obtain the lipid bi-layer.

Optimization of Super-Hydrophobic Property by Two-Step Surface Modification

2019 ◽  
Vol 19 (11) ◽  
pp. 7192-7197 ◽  
Author(s):  
Jaewoong Choi ◽  
Ji-Seon Kwon ◽  
Chang-Hyun Lee ◽  
Kang Bae ◽  
Sunyoung Sohn ◽  
...  
Keyword(s):  
Surface Modification ◽  
Lauric Acid ◽  
Surface Coating ◽  
Potassium Hydroxide ◽  
Treatment Process ◽  
Hydrophobic Surface ◽  
The Other ◽  
Hydrophobic Property ◽  
Water Contact ◽  
Acid Coating

The super-hydrophobic surface can be used in anti-pollution, self-cleaning, and anti-corrosive properties. Two-step surface treatment process on Al-coated glass was conducted by surface etching using potassium hydroxide (KOH) and surface coating using lauric acid for super-hydrophobic surface. The KOH-etched Al surface (1st etching) was changed to a hydrophilic property with a water contact angle (WCA) of 68° to 48°. On the other hand, the WCA of the etched Al surface was changed to about 153° with super-hydrophobic property when the lauric acid coating (2nd coating) was applied on the KOH-etched Al surface for 30 minutes. We found that the hydrophobicity of Al surface was related to the roughness by surface modification as well as the Al film thickness by sputtering method.

scholarly journals A cement paste–tail sealant interface modified with a silane coupling agent for enhancing waterproofing performance in a concrete lining system

RSC Advances ◽  
2019 ◽  
Vol 9 (13) ◽  
pp. 7165-7175 ◽  
Author(s):  
Fan Li ◽  
Yuyou Yang ◽  
Mingjiang Tao ◽  
Xiangqian Li
Keyword(s):  
Cement Paste ◽  
Coupling Agent ◽  
Surface Coating ◽  
Silane Coupling Agent ◽  
Hydrophobic Surface ◽  
Concrete Lining ◽  
Underground Structures ◽  
System P ◽  
Silane Coupling

Although hydrophobic surface coating of concrete is currently used to enhance waterproofing performance of underground structures, the chemical and mechanical incompatibility between them is a challenge to ensure long-term waterproofing properties.

Stable, Nanoscale Glycosphingolipid Films for Use in Sensing Applications

2004 ◽  
Vol 823 ◽  
Author(s):  
Rory Stine ◽  
Cara-Lynne Schengrund ◽  
Michael V. Pishko
Keyword(s):  
Surface Coating ◽  
Hydrophobic Surface ◽  
Gold Surface ◽  
Lipid Monolayers ◽  
Lipid Layer ◽  
Self Assembled Monolayer ◽  
Sensing Applications ◽  
Protein Resistant ◽  
Resistant Layer ◽  
Air Liquid Interface

AbstractWe have developed a means of producing thin, oriented lipid monolayers which are stable under repeated washing and which may be useful in biosensing or surface- coating applications. Phosphotidylcholine (PC) and the glycosphingolipid (GSL) GM1 were used as representative lipids for this process. Initially, a mixed self-assembled monolayer of octanethiol and hexadecanethiol was constructed on a clean gold surface. This hydrophobic surface was then brought into contact with a thin lipid layer that had been deposited at the air/liquid interface of a solution by evaporating a mixture of lipid in hexane on top of a layer of water. The lipid layer, now deposited on the gold surface, was then heated to cause intercalation of the fatty acid and alkanethiol chains, and cooled to form a highly stable film which withstood repeated rinsing and solution exposure. Presence and stability of the film was confirmed via ellipsometry, FTIR, and QCM, with an average overall thickness of ∼3.5 nm. These films may be potentially useful in biotoxin detection or as a protein resistant layer for the prevention of biofouling.

scholarly journals Effect of Hydrophobic Surface Coating on Flowability of Ceramic Tile Granule Powders

2019 ◽  
Vol 29 (7) ◽  
pp. 425-431
Author(s):  
Jin-Ho Kim ◽  
Ung-Soo Kim ◽  
Kyu-Sung Han ◽  
Kwang-Take Hwang
Keyword(s):  
Ceramic Tile ◽  
Surface Coating ◽  
Hydrophobic Surface
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