Nepenthes pitcher inspired isotropic/anisotropic polymer solid–liquid composite interface: preparation, function, and application

2021 ◽  
Author(s):  
Pu Guo ◽  
Zubin Wang ◽  
Xiao Han ◽  
Liping Heng
Keyword(s):  
Recent Advances ◽  
Composite Interface ◽  
Solid Liquid ◽  
Composite Interfaces

This review summarizes recent advances in isotropic/anisotropic polymer solid–liquid composite interfaces, focusing on their preparation, functions, and applications.

scholarly journals Recent Advances in Valorization Methods of Inorganic/Organic Solid, Liquid, and Gas Wastes

2012 ◽  
Vol 2012 ◽  
pp. 1-2
Author(s):  
Licínio M. Gando-Ferreira ◽  
Faïçal Larachi ◽  
Santiago Esplugas
Keyword(s):  
Recent Advances ◽  
Organic Solid ◽  
Solid Liquid

scholarly journals Performance and Fracture Analysis of Composite Interfaces for Semi-Flexible Pavement

Coatings ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 1231
Author(s):  
Kuanghuai Wu ◽  
Xiaoyu Liu ◽  
Xu Cai ◽  
Wenke Huang ◽  
Jinlou Yu ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Digital Image Analysis ◽  
Flexible Pavement ◽  
Interfacial Water ◽  
Damage Resistance ◽  
Pavement Materials ◽  
Modified Asphalt ◽  
Composite Interface ◽  
Pavement Engineering ◽  
Composite Interfaces

Semi-flexible pavement is widely used in pavement engineering due to its excellent rutting resistance; however, it mainly fails due to cracking. Therefore, it is important to understand the properties of the aggregate–mortar–asphalt interfacial transition zone, to better understand the cracking mechanism of the semi-flexible pavement. In this work, we used pull-off tests and digital image analysis technology to compare and analyze the interfacial tensile strength and granite–bitumen–mortar interactions in three types of asphalt (70# matrix asphalt, PG76-22 modified asphalt and S-HV modified asphalt) at different curing ages. The analysis results showed that, for the three different bitumen materials, with settled mortar, the peak interfacial tensile strength values all occurred at approximately 14 d of curing. In addition, the order of the tensile strength followed the order of asphalt penetration degree; the order of the interfacial water damage resistance from weak to strong was 70# asphalt cementation specimen, PG76-22 modified asphalt cementation specimen, and S-HV modified asphalt cementation specimen. The results of this analysis highlight the original contributions of the optimum curing time for the composite interface of semi-flexible pavement materials prepared with different asphalts to reach optimum crack resistance.

scholarly journals Different Lingual Retainer Composites and the Microleakage between Enamel-Composite and Wire-Composite Interfaces

2008 ◽  
Vol 78 (5) ◽  
pp. 941-946 ◽  
Author(s):  
Tancan Uysal ◽  
Mustafa Ulker ◽  
Asli Baysal ◽  
Serdar Usumez
Keyword(s):  
Stainless Steel ◽  
Statistical Analysis ◽  
Steel Wire ◽  
Composite Interface ◽  
Study Support ◽  
Mandibular Canine ◽  
Lingual Retainer ◽  
Flowable Composites ◽  
Composite Interfaces ◽  
Nail Varnish

Abstract Objective: To assess microleakage of enamel-composite and wire-composite interfaces when retainer wires were bonded with two orthodontic and a flowable composites. Materials and Methods: Forty-five freshly extracted human mandibular canine teeth were used in this study. Teeth were separated into three groups of 15 teeth each. Round stainless-steel wire of 0.36-in. diameter in three groups was bonded to enamel by Transbond XT (3M Unitek), Transbond LR (3M Unitek), and Venus Flow (Heraeus Kulzer) composites. Specimens were further sealed with nail varnish, stained with 0.5% basic fuchsine for 24 hours, sectioned and examined under a stereomicroscope, and scored for microleakage for the enamel-composite and wire-composite interfaces from mesial and distal margins. Statistical analysis was performed by Kruskal-Wallis and Mann-Whitney U-tests. Results: Little or no microleakage was determined at the mesial and distal sides for three composites in two different interfaces, and these findings were not statistically significant (P > .05). No statistically significant differences were observed among all composite groups for the microleakage with either of the interfaces. Venus Flow in the enamel-composite interface and Transbond LR in the wire-composite interface exhibited no microleakage. Conclusion: The presence of wire in the mesial portion of the lingual retainer did not increase the microleakage at the enamel-composite and wire-composite interfaces in all groups. The microleakage results in this study support the use of all these composites in routine orthodontic practice.

scholarly journals Towards optimization of patterned superhydrophobic surfaces

2007 ◽  
Vol 4 (15) ◽  
pp. 643-648 ◽  
Author(s):  
Bharat Bhushan ◽  
Michael Nosonovsky ◽  
Yong Chae Jung
Keyword(s):  
Contact Angle ◽  
Contact Angle Hysteresis ◽  
Hydrophobic Surface ◽  
Dimensional Parameter ◽  
Wetting Properties ◽  
Spacing Factor ◽  
Composite Interface ◽  
Experimental Values ◽  
Solid Liquid Interface ◽  
Solid Liquid

Experimental and theoretical study of wetting properties of patterned Si surfaces with cylindrical flat-top pillars of various sizes and pitch distances is presented. The values of the contact angle (CA), contact angle hysteresis (CAH) and tilt angle (TA) are measured and compared with the theoretical values. Transition from the composite solid–liquid–air to the homogeneous solid–liquid interface is investigated. It is found that the wetting behaviour of a patterned hydrophobic surface depends upon a simple non-dimensional parameter, the spacing factor, equal to the pillar diameter divided by the pitch. The spacing factor controls the CA, CAH and TA in the composite interface regime, as well as destabilization and transition to the homogeneous interface. We show that the assumption that the CAH is a consequence of the adhesion hysteresis and surface roughness leads to the theoretical values of the CAH that are in a reasonably good agreement with the experimental values. By decreasing the spacing factor, the values of CA=170°, CAH=5° and TA=3° are achieved. However, with further decreasing of the spacing factor, the composite interface destabilizes.

A Lattice Boltzmann Approach for Directional Transporting of Droplets Using Heterogeneous Surface Roughness

2013 ◽  
Author(s):  
Jung Shin Lee ◽  
Joon Sang Lee
Keyword(s):  
Surface Roughness ◽  
Projection Method ◽  
Lattice Boltzmann ◽  
Immiscible Fluids ◽  
Droplet Breakup ◽  
Heterogeneous Surface ◽  
Textured Surface ◽  
Composite Interface ◽  
Droplet Movement ◽  
Solid Liquid

Fluid droplet on a surface with roughness has been simulated to investigate the hydrophobicity of surface and also measure the increase in contact angle (CA). Surface roughness increases the area of solid-liquid interface and this increase in composite interface makes the water to repel solid surface, thus causing an increase of the CA. Recently heterogeneous structure surface, which is pillar or rib structures with gradually changing pitches in certain direction, has gained lot of interest from researchers because wetting characteristics of those structures allow droplet movement without external forces. In this paper, droplet movement for heterogeneous surface cases are simulated with the computational fluid dynamics (CFD) modeling, known as Lattice Boltzmann method (LBM). First part of the study concentrates on droplet transportation. Half of the surface is more-hydrophobic region, textured with microscopic pillars and the other part of surface is less-hydrophobic, textured or smooth surface. Second part of the study concentrates on droplet breakup. More-hydrophobic textured band is located at center of less-hydrophobic textured surface. To see the effect of surface structure only, we choose same chemical property for all surfaces. Water droplets are spatially placed on border line of the different textures of surface. The simulations are carried out using projection method of LBM. Projection method has been used to in this study to be able to model the large density difference between air and water. Two phase immiscible fluids flow consisting of air and water (density ratio of air to water = 1:1000) is built in 3D space by using Projection method. This method can calculate solid-liquid-gas composite interface.

scholarly journals To the Question on the Use of Multivariate Analysis and 2D Visualisation of Synchrotron ATR-FTIR Chemical Imaging Spectral Data in the Diagnostics of Biomimetic Sound Dentin/Dental Composite Interface

Diagnostics ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 1294
Author(s):  
Pavel Seredin ◽  
Dmitry Goloshchapov ◽  
Vladimir Kashkarov ◽  
Yuri Ippolitov ◽  
Ivan Ippolitov ◽  
...  
Keyword(s):  
Cluster Analysis ◽  
Spectral Data ◽  
Short Communication ◽  
Hierarchical Cluster ◽  
Chemical Imaging ◽  
Dental Composite ◽  
Ftir Microspectroscopy ◽  
Powerful Approach ◽  
Composite Interface ◽  
Composite Interfaces

In this short communication, we provide information on the use of the hierarchical cluster analysis of synchrotron ATR-FTIR 2D chemical imaging spectral data as a useful and powerful approach to the microspectroscopic diagnostics of molecular composition in the hybrid sound dentin/dental composite interfaces and materials, including ones developed with the use of biomimetic strategies. The described diagnostic approach can be successfully transferred to the analysis and visualisation of 2D spectral data, collected using laboratory Raman and FTIR microspectroscopy techniques.

Recent Advances in High Dispersion Spectroscopy of Globular Cluster Stars

1988 ◽  
Vol 132 ◽  
pp. 525-530
Author(s):  
Raffaele G. Gratton
Keyword(s):  
Globular Cluster ◽  
Globular Clusters ◽  
High Dispersion ◽  
Photographic Material ◽  
Recent Advances ◽  
Metal Abundances ◽  
Ccd Detectors ◽  
Major Progress

The use CCD detectors has allowed a major progress in abundance derivations for globular cluster stars in the last years. Abundances deduced from high dispersion spectra now correlates well with other abundance indicators. I discuss some problems concerning the derivation of accurate metal abundances for globular clusters using high dispersion spectra from both the old photographic and the most recent CCD data. The discrepant low abundances found by Cohen (1980), from photographic material for M71 giants, are found to be due to the use of too high microturbulences.

Atom-probe analysis of the solid-liquid interface

1995 ◽  
Vol 53 ◽  
pp. 676-677
Author(s):  
J.A. Panitz
Keyword(s):  
Molecular Level ◽  
Selective Adsorption ◽  
Electronic Devices ◽  
Atom Probe ◽  
Chemical Agent ◽  
Hostile Environment ◽  
Solid Interface ◽  
Solid Liquid Interface ◽  
Solid Liquid ◽  
Chemically Selective

The first few atomic layers of a solid can form a barrier between its interior and an often hostile environment. Although adsorption at the vacuum-solid interface has been studied in great detail, little is known about adsorption at the liquid-solid interface. Adsorption at a liquid-solid interface is of intrinsic interest, and is of technological importance because it provides a way to coat a surface with monolayer or multilayer structures. A pinhole free monolayer (with a reasonable dielectric constant) could lead to the development of nanoscale capacitors with unique characteristics and lithographic resists that surpass the resolution of their conventional counterparts. Chemically selective adsorption is of particular interest because it can be used to passivate a surface from external modification or change the wear and the lubrication properties of a surface to reflect new and useful properties. Immunochemical adsorption could be used to fabricate novel molecular electronic devices or to construct small, “smart”, unobtrusive sensors with the potential to detect a wide variety of preselected species at the molecular level. These might include a particular carcinogen in the environment, a specific type of explosive, a chemical agent, a virus, or even a tumor in the human body.

Chelation-assisted transition metal-catalysed C–H chalcogenylations

2020 ◽  
Vol 7 (8) ◽  
pp. 1022-1060 ◽  
Author(s):  
Wenbo Ma ◽  
Nikolaos Kaplaneris ◽  
Xinyue Fang ◽  
Linghui Gu ◽  
Ruhuai Mei ◽  
...  
Keyword(s):  
Transition Metal ◽  
Recent Advances ◽  
Site Selectivity ◽  
Transition Metal Catalyzed ◽  
Metal Catalyzed

This review summarizes recent advances in C–S and C–Se formations via transition metal-catalyzed C–H functionalization utilizing directing groups to control the site-selectivity.

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