Facile Fabrication of Amorphous Colloidal Array Patterns with Good Mechanical Stability via an Infiltration-Driven Mayer Rod Coating Method

2022 ◽  
Author(s):  
Ting Lü ◽  
Jujun Chen ◽  
Dongming Qi ◽  
Hongting Zhao
Keyword(s):  
Mechanical Stability ◽  
Coating Method ◽  
Facile Fabrication

scholarly journals Facile fabrication of ultra-light and highly resilient PU/RGO foams for microwave absorption

RSC Advances ◽  
2017 ◽  
Vol 7 (66) ◽  
pp. 41321-41329 ◽  
Author(s):  
Chunmei Zhang ◽  
Hua Li ◽  
Zhangzhi Zhuo ◽  
Roberto Dugnani ◽  
Chongyang Sun ◽  
...  
Keyword(s):  
Microwave Absorption ◽  
Dip Coating ◽  
Composite Foams ◽  
Coating Method ◽  
Facile Fabrication ◽  
Absorption Performance ◽  
Microwave Absorbing ◽  
Dip Coating Method ◽  
Microwave Absorption Performance

Ultra-light and highly resilient PU/RGO foams are fabricated by a simple dip-coating method. The composite foams exhibit excellent microwave absorption performance and can be used as good microwave absorbing commercial cladding materials.

Fabrication of Multilayered Polymer Composite Fibers for Enhanced Functionalities

2021 ◽  
Author(s):  
Weiheng Xu ◽  
Dharneedar Ravichandran ◽  
Sayli Jambhulkar ◽  
Yuxiang Zhu ◽  
Kenan Song
Keyword(s):  
Mechanical Stability ◽  
Thermoplastic Polyurethane ◽  
Hot Isostatic Pressing ◽  
Air Pressure ◽  
Gauge Factor ◽  
Piezoresistive Sensor ◽  
Macro Scale ◽  
Facile Fabrication ◽  
Surface Morphologies ◽  
Hierarchal Structure

Abstract Carbon nanoparticles-based polymer composites have wide applications across different fields for their unique functional properties, durability, and chemical stability. When combining nanoparticle morphologies with micro- or macro-scale morphologies, the hierarchal structure often would greatly enhance the composites’ functionalities. Here in this work, a thermoplastic polyurethane (TPU) and graphene nanoplatelets (GnPs) based multilayered fiber is fabricated through the combination of dry-jet-wet spinning, based on an in-house designed spinneret which accommodates three layers spinning solution, and hot isostatic pressing (HIP), at 220 °C. The multilayered spinneret enables the spinnability of a high GnPs loaded spinning dope, highly elastic, with great mechanical strength, elongation, and flexibility. The HIP process resulted in superior electrical properties as well as a newly emerged fourth hollow layer. Together, such a scalable fabrication method promotes a piezoresistive sensor that is sensitive to uniaxial strain and radial air pressure. The hollow fiber is characterized based on surface morphologies, layer formation, percolation threshold, piezoresistive gauge factor, mechanical stability and reversibility, and air-pressure sensitivity and reversibility. Such facile fabrication methods and unique structures have combined the mechanically robust outer shell with a highly conductive middle sensing layer for a new sensor with great potentials in wearable, robotics, biomedical, and other areas.

scholarly journals Development of a Stable TiO2Nanocomposite Self-Cleaning Coating for Outdoor Applications

2016 ◽  
Vol 2016 ◽  
pp. 1-8 ◽  
Author(s):  
F. Madidi ◽  
G. Momen ◽  
M. Farzaneh
Keyword(s):  
Mechanical Stability ◽  
Low Cost ◽  
Spray Coating ◽  
Dielectric Behavior ◽  
Superhydrophobic Coatings ◽  
Angle Measurements ◽  
Coating Method ◽  
Specific Frequency ◽  
Self Cleaning ◽  
The Stability

A convenient and low-cost approach for the elaboration of a stable superhydrophobic coating is reported, involving the use of TiO2nanoparticles via the spray coating method. This method can be used for preparing self-cleaning superhydrophobic coatings on large areas for different kinds of substrates. The synergistic effect of the micro/nanobinary scale roughness was produced by a multilayer RTV SR/TiO2composite. The influence of the nanofiller concentration in a specific frequency range (40 Hz to 2 MHz) on the dielectric behavior was analyzed as well. It was found that the real relative permittivity (εr′) increases as the nanofiller concentration increases. Superhydrophobic behavior is analyzed by contact angle measurements, scanning electron microscopy (SEM), and profilometer. The stability of the developed coating also has been evaluated in terms of immersion in various aqueous solutions, heating, adhesion, and exposure to UV irradiation, and the results showed good stability against these factors. The coating retained its superhydrophobicity after several days of immersion in solutions of different pH levels (2, 4, 6, and 12) and different conductivities. In addition, they also exhibited exceptional stability against UV radiation and heating, as well as good mechanical stability.

Facile fabrication of a superhydrophobic fabric with mechanical stability and easy-repairability

2012 ◽  
Vol 380 (1) ◽  
pp. 182-186 ◽  
Author(s):  
Xiaotao Zhu ◽  
Zhaozhu Zhang ◽  
Jin Yang ◽  
Xianghui Xu ◽  
Xuehu Men ◽  
...  
Keyword(s):  
Mechanical Stability ◽  
Facile Fabrication

scholarly journals Fabrication of durable superhydrophobic/oleophilic cotton fabric for highly efficient oil/water separation

2020 ◽  
Author(s):  
M. E. Mohamed ◽  
B. A. Abd-El-Nabey
Keyword(s):  
Cotton Fabric ◽  
Mechanical Stability ◽  
Separation Efficiency ◽  
Silicone Oil ◽  
Absorption Capacity ◽  
Water Contact ◽  
Water Separation ◽  
Coating Method ◽  
Oil Water Separation ◽  
Oil Water

Abstract In the present work, dopamine is self-polymerized on cotton fabric by a simple deep-coating method and followed by modification with an ethanolic solution of palmitic acid: a superhydrophobic/oleophilic cotton fabric was obtained. The as-prepared cotton fabric exhibits a superhydrophobic character with a water contact angle of 157o. The absorption capacity of as-prepared superhydrophobic/oleophilic cotton fabric in n-hexane, petroleum ether, and silicone oil was determined. The results show that silicone oil has the highest absorption capacity while n-hexane has the lowest value. The absorption capacity is nearly constant even after ten cycles, indicating the efficient recyclability of the as-prepared superhydrophobic/oleophilic cotton fabric for oil separation. The as-prepared superhydrophobic/oleophilic cotton fabric shows excellent separation efficiency, high flux rate, and excellent chemical and mechanical stability.

scholarly journals Zeolitic-imidazole framework thin film-based flexible resistive switching memory

RSC Advances ◽  
2017 ◽  
Vol 7 (34) ◽  
pp. 21045-21049 ◽  
Author(s):  
Myung-Joo Park ◽  
Jang-Sik Lee
Keyword(s):  
Thin Film ◽  
Resistive Switching ◽  
Mechanical Stability ◽  
Memory Device ◽  
Dip Coating ◽  
Resistive Switching Memory ◽  
Coating Method ◽  
Dip Coating Method ◽  
Switching Memory

A flexible resistive switching memory device based on ZIF-8 is fabricated using a dip coating method. The device shows reliable resistive switching with mechanical stability.

An improved design for an Scanning Tunnelling Microscope (STM) for use in a Transmission Electron Microscope (TEM)

1991 ◽  
Vol 49 ◽  
pp. 384-385
Author(s):  
W.K. Lo ◽  
J.C.H. Spence
Keyword(s):  
Electron Microscope ◽  
Transmission Electron Microscope ◽  
Mechanical Stability ◽  
Scanning Tunnelling Microscope ◽  
Reflection Mode ◽  
Specimen Holder ◽  
Transmission Electron ◽  
Scanning Tunnelling ◽  
Improved Design

An improved design for a combination Scanning Tunnelling Microscope/TEM specimen holder is presented. It is based on earlier versions which have been used to test the usefulness of such a device. As with the earlier versions, this holder is meant to replace the standard double-tilt specimen holder of an unmodified Philips 400T TEM. It allows the sample to be imaged simultaneously by both the STM and the TEM when the TEM is operated in the reflection mode (see figure 1).The resolution of a STM is determined by its tip radii as well as its stability. This places strict limitations on the mechanical stability of the tip with respect to the sample. In this STM the piezoelectric tube scanner is rigidly mounted inside the endcap of the STM holder. The tip coarse approach to the sample (z-direction) is provided by an Inchworm which is located outside the TEM vacuum.

Experiments with a scanning tunneling microscope (STM) mounted in a scanning electron microscope (SEM)

1986 ◽  
Vol 44 ◽  
pp. 636-639
Author(s):  
Oliver C. Wells ◽  
Mark E. Welland
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Mechanical Stability ◽  
Tunneling Current ◽  
Feedback System ◽  
Scanning Tunneling ◽  
Surface Profiling ◽  
Close Proximity ◽  
Metal Tip ◽  
Scanning Electron

Scanning tunneling microscopes (STM) exist in two versions. In both of these, a pointed metal tip is scanned in close proximity to the specimen surface by means of three piezos. The distance of the tip from the sample is controlled by a feedback system to give a constant tunneling current between the tip and the sample. In the low-end STM, the system has a mechanical stability and a noise level to give a vertical resolution of between 0.1 nm and 1.0 nm. The atomic resolution STM can show individual atoms on the surface of the specimen.A low-end STM has been put into the specimen chamber of a scanning electron microscope (SEM). The first objective was to investigate technological problems such as surface profiling. The second objective was for exploratory studies. This second objective has already been achieved by showing that the STM can be used to study trapping sites in SiO2.

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