Recent Patents on Preparation Methods and Mechanical Stability of Superhydrophobic Surface

2021 ◽  
Vol 15 ◽  
Author(s):  
Zhaolong Li ◽  
Yingtao Liu
Keyword(s):  
Superhydrophobic Surface ◽  
Mechanical Stability ◽  
Sol Gel ◽  
Mechanical Action ◽  
Superhydrophobic Surfaces ◽  
Research Progress ◽  
Step Method ◽  
Preparation Methods ◽  
Advantages And Disadvantages ◽  
Application Fields

Background: Superhydrophobic surfaces have unique wettability and have shown broad application prospects in many fields, such as self-cleaning and lubrication drag reduction. However, the superhydrophobic surfaces are severely restricted by their poor mechanical stability in practical application, and the mechanical stability of the superhydrophobic surface is always affected by different preparation methods. Therefore, people pay more attention to the preparation methods of superhydrophobic surfaces. Objective: The study aims to improve the mechanical stability of the superhydrophobic surface and expand the application fields of the superhydrophobic surfaces; preparation methods of the superhydrophobic surface have been continuously improved. Methods: This paper reviews various representative patents and papers on preparation methods of the superhydrophobic surface at home and abroad. Results: In this review, the basic methods of preparing superhydrophobic surfaces were introduced, and three typical methods were summarized, such as etching method, coating method, and sol-gel method, then their advantages and disadvantages were discussed. In combination with the latest research progress, it is proposed that the use of environmentally friendly low surface energy modifiers and the use of the one-step method to prepare superhydrophobic surfaces are the future development trends. Aiming at the problem of the mechanical stability of superhydrophobic surfaces, the instability mechanism and stability evaluation methods of superhydrophobic surfaces under mechanical action are reviewed, and three basic methods to improve the mechanical stability of superhydrophobic surfaces are proposed. Conclusion: The optimization of the preparation method of the superhydrophobic surface is beneficial to improve the mechanical stability of the superhydrophobic surface and expand the application prospect of the superhydrophobic surfaces in various fields. More patents and papers on the superhydrophobic surface will be invented later.

Progress in fabrication and applications of micro/nanostructured superhydrophobic surfaces

2021 ◽  
pp. 1-22
Author(s):  
Qing Wang ◽  
Shuangshuang Xu ◽  
Xiaoting Xing ◽  
Ning Wang
Keyword(s):  
Mechanical Stability ◽  
Sol Gel ◽  
Superhydrophobic Surfaces ◽  
Research Progress ◽  
Electrochemical Technique ◽  
Energy Materials ◽  
Electrospinning Technique ◽  
Water Separation ◽  
Functional Applications ◽  
Oil Water Separation

Natural biological surfaces such as lotus leaves and water striders have micro- and nanostructures and low-surface-energy materials, possessing excellent superhydrophobicity. It has become an important research topic to construct bionic superhydrophobic surfaces and explore their functional applications. This paper reviews the research progress on the fabrication and applications of superhydrophobic surfaces with micro/nanostructures. The techniques used for fabricating superhydrophobic surfaces, including the template method, nano-imprinting technique, laser-treatment, plasma treatment, electrospinning technique, solution-chemical etching method, electrochemical technique, phase separation method and sol–gel process, were introduced. Also, the diverse functional applications of superhydrophobic surfaces such as self-cleaning, anti-icing, oil–water separation, anti-corrosion and drag reduction were summarised. It is believed that green fabrication will become the future development direction of superhydrophobic surfaces. Further exploration for the superhydrophobic surfaces with mechanical stability and durability will be expected to expand the application prospect and commercial value of superhydrophobic surfaces.

Ultrafine W-Cu Composite Powder Research Progress

2012 ◽  
Vol 535-537 ◽  
pp. 86-89 ◽  
Author(s):  
Jian Xin Gao ◽  
Yun Gang Li ◽  
Ying Tian ◽  
Yang Jiao
Keyword(s):  
Composite Powder ◽  
Sol Gel ◽  
Research Progress ◽  
Precipitation Method ◽  
Market Demand ◽  
Powder Preparation ◽  
Preparation Methods ◽  
Advantages And Disadvantages ◽  
Homogeneous Precipitation Method ◽  
Co Reduction

With the increased market demand of W-Cu composite materials, the research of ultrafine W-Cu composite powder is gradually in-depth, and some achievements have been made. This article describes some ultrafine W-Cu composite powder preparation methods in recent years, such as the mechanical alloying, oxide co-reduction, mechanical thermal chemical method, homogeneous precipitation method, spray drying, sol-gel method, etc. We simply analyzed the advantages and disadvantages of each method.

scholarly journals One-step fabrication of soft calcium superhydrophobic surfaces by a simple electrodeposition process

RSC Advances ◽  
2022 ◽  
Vol 12 (1) ◽  
pp. 297-308
Author(s):  
Zhi Chen ◽  
Yongbo Hu ◽  
Xu He ◽  
Yihao Xu ◽  
Xuesong Liu ◽  
...  
Keyword(s):  
Formation Process ◽  
Superhydrophobic Surface ◽  
Surface Preparation ◽  
Superhydrophobic Surfaces ◽  
Water Droplets ◽  
Step Method ◽  
Electrodeposition Process ◽  
Pressing Force ◽  
One Step

We investigated a one-step method for calcium superhydrophobic surface preparation and researched the formation process of loose, flower-like microstructures. Also, we found that the pressing force strongly impacts the dynamics of water droplets.

Research Progress of Preparation Technology of Nano Copper Powder for 3D Printing

2018 ◽  
Vol 777 ◽  
pp. 150-157
Author(s):  
Jing Min Shi ◽  
Jian Wei Wang ◽  
Wei Xiao
Keyword(s):  
3D Printing ◽  
Copper Powder ◽  
Physical Vapor Deposition ◽  
Sol Gel ◽  
Radiation Chemistry ◽  
Research Progress ◽  
Chemical Methods ◽  
Advantages And Disadvantages ◽  
Explosion Method ◽  
Physical And Chemical

Nanocopper has become one of the research hotspots of metal powder for 3D printing, due to its excellent properties. In this paper, technical methods, process flow and research progress were systematically introduced of nanocopper powder for 3D printing. Preparation of nano-copper powder for 3D printing are mainly physical and chemical methods. Physical methods include atomization method, physical vapor deposition method, grinding method, electric explosion method. Chemical methods include sol-gel method, radiation chemistry, plasma, microemulsion, hydrothermal, liquid reduction and so on. The advantages and disadvantages of these methods were compared in detail, and the future development direction of nano-copper powder for 3D printing was look forward to.

The Preparation Approaches of Polymer/graphene Nanocomposites and their Appilcation Research Progress as Electrochemical Sensors

2017 ◽  
Vol 20 (4) ◽  
pp. 205-221 ◽  
Author(s):  
Weifeng Chen ◽  
Shaona Chen ◽  
Weimin Hu ◽  
Dejiang Li ◽  
Zhongxu Dai
Keyword(s):  
Electrochemical Sensors ◽  
Synergetic Effect ◽  
Research Progress ◽  
Honeycomb Lattice ◽  
Electrochemical Performances ◽  
Preparation Methods ◽  
Graphene Nanocomposites ◽  
Advantages And Disadvantages ◽  
Solution Blending

Graphene, a two-dimensional sheet of sp2-hybridized carbon atoms packed into a honeycomb lattice, can be combined with various polymers through different methods and techniques. Polymer/graphene nanocomposites are expected to not only preserve the fa-vorable properties of graphene and polymers, but also greatly enhance the intrinsic properties due to the synergetic effect between them. In this review, the preparation approaches of graphene/polymer nanocomposites, including melt blending, solution blending, in-situ polymeri-zation and in-situ synthesis, were presented comprehensively in order to study the relationship between these approaches and the final characteristics and performances. Each approach had different influences on the final properties of the nanocomposites. The advantages and disadvantages of the preparation methods were discussed respectively. Additionally, the application researches of the polymer/graphene nanocomposites as electrochemical sensors, were introduced in detail. With regard to some important or novel sensors, the mechanisms were proposed for reference. Finally, conclusions were given and the issues waiting to be settled for further development were pointed out. The current review demonstrates that polymer/graphene nanocomposites exhibit superior electrochemical performances and will be applied practically in the field of sensor devices.

scholarly journals Research Progress Review of Preparation and Applications of Fluorescent Hydrogels

2020 ◽  
Vol 2020 ◽  
pp. 1-17
Author(s):  
Weiwei Su ◽  
Ran Wang ◽  
Cheng Qian ◽  
Xuetong Li ◽  
Qi Tong ◽  
...  
Keyword(s):  
Drug Delivery ◽  
Optical Properties ◽  
Self Assembly ◽  
Research Progress ◽  
Preparation Methods ◽  
Reference Information ◽  
Imaging Probes ◽  
Bio Imaging ◽  
Application Fields

The fluorescent gel with good flexibility and biocompatibility has attracted more and more attention due to its excellent optical properties. In this paper, the research progresses in preparation methods and applications of fluorescent gels are reviewed. In addition, the preparation methods of self-assembly and polymerization of fluorescent gel are also introduced. In this paper, it should be noted that some outstanding research about the fluorescent gels used in sensors, bio-imaging probes, drug delivery, and other application fields is summarized. This work provides useful reference information for further exploration and study of fluorescent hydrogels.

A Two-Step Method to Prepare Stable Superhydrophobic Surface on Steel Substrates

2012 ◽  
Vol 463-464 ◽  
pp. 349-353 ◽  
Author(s):  
Feng Guo ◽  
Xun Jia Su ◽  
Gen Liang Hou ◽  
Zhao Hui Liu ◽  
Hai Peng Jia
Keyword(s):  
Contact Angle ◽  
Superhydrophobic Surface ◽  
Low Cost ◽  
Superhydrophobic Surfaces ◽  
Step Method ◽  
Water Contact ◽  
Lotus Leaf ◽  
Nanoscale Particles ◽  
Steel Substrates

Superhydrophobic surfaces have been a hot topic during the last decade owing to their great potential in widely application. In this work, we report on a facile and low-cost two-step method to fabricate superhydrophobic surface on steel substrates. The as-obtained surface shows an interesting hierarchical structure composed of microscale flowerlike cluster and nanoscale particles, which is similar to that of a lotus leaf. After further modification with stearic acid, the resultant surface exhibits remarkable superhydrophobic properties. The water contact angle is as high as 155°. Moreover, the superhydrophobic properties are long-term stable.

Research Progress on Preparation of SiC/Al for Electronic Packaging by Liquid Infiltration

2021 ◽  
Vol 1035 ◽  
pp. 906-917
Author(s):  
Meng Qin Chen ◽  
Yue Long Bai ◽  
Zhi Feng Zhang
Keyword(s):  
Electronic Packaging ◽  
Volume Fraction ◽  
High Volume ◽  
Development Trend ◽  
Research Progress ◽  
Preparation Methods ◽  
Advantages And Disadvantages ◽  
Liquid Infiltration ◽  
Al Composite ◽  
The Development Trend

High volume fraction SiC/Al composite material, with its excellent thermal properties and flexible preparation process, has been widely used in the field of electronic packaging. In the paprer, the development of SiC/Al materials for electronic packaging and their preparation methods are reviewed. The preparation processes for preparing SiC/Al by liquid infiltration are mainly introduced. The advantages and disadvantages of several important processes are analyzed. Finally, the development trend of SiC/Al for electronic packaging prepared by liquid infiltration is prospected.

scholarly journals Research status of damage identification algorithm based on deep learning

2021 ◽  
Vol 233 ◽  
pp. 04039
Author(s):  
Zhu Denghui ◽  
Song Lizhong ◽  
Feng yuan ◽  
Yang Quanshun
Keyword(s):  
Deep Learning ◽  
Target Detection ◽  
Damage Identification ◽  
Rapid Development ◽  
Research Progress ◽  
Data Sets ◽  
Identification Algorithm ◽  
Advantages And Disadvantages ◽  
Detection Technology ◽  
Application Fields

One of the core tasks of computer vision is target detection. With the rapid development of deep learning, target detection technology based on deep learning has become the mainstream algorithm in this field. As one of the main application fields, damage identification has achieved important development in the past decade. This paper systematically summarizes the research progress of damage identification algorithm based on deep learning, analyzes the advantages and disadvantages of each algorithm and its detection results on voc2007, voc2012 and coco data sets. Finally, the main contents of this paper are summarized, and the research prospect of deep learning based damage identification algorithm is prospect.

Research Progress of the Counter Electrode in Dye-Sensitized Solar Cells

2010 ◽  
Vol 451 ◽  
pp. 63-78 ◽  
Author(s):  
Ying Tong Tang ◽  
Xu Pan ◽  
Song Yuan Dai ◽  
Chang Neng Zhang ◽  
Huan Jun Tian
Keyword(s):  
Counter Electrode ◽  
Dye Sensitized Solar Cells ◽  
Precious Metals ◽  
Research Progress ◽  
Counter Electrodes ◽  
Preparation Methods ◽  
Advantages And Disadvantages ◽  
Dye Sensitized ◽  
Different Types ◽  
Sensitized Solar Cells

This review covers recent research on counter electrodes using platinum (Pt), carbon and conducting polymers as catalysts for the reduction of triiodide in the dye-sensitized solar cell. Different types of counter electrode preparation methods and their advantages and disadvantages are compared. The inadequacy of the counter electrode with the precious metals and the advantages of the non-metallic-type counter electrode are pointed out. Especially, recent research on the Pt counter electrode in our group is discussed concerning with the reaction mechanism of the triiodide (I3-)/ iodide (I-) redox couple on the Pt counter electrode.

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