Low-cost one-step fabrication of superhydrophobic surface on Al alloy

2011 ◽  
Vol 257 (18) ◽  
pp. 7928-7931 ◽  
Author(s):  
Youfa Zhang ◽  
Jie Wu ◽  
Xinquan Yu ◽  
Hao Wu
Keyword(s):  
Superhydrophobic Surface ◽  
Low Cost ◽  
Al Alloy ◽  
One Step

One-step electrodeposition fabrication of a superhydrophobic surface on an aluminum substrate with enhanced self-cleaning and anticorrosion properties

RSC Advances ◽  
2015 ◽  
Vol 5 (121) ◽  
pp. 100000-100010 ◽  
Author(s):  
Binbin Zhang ◽  
Yantao Li ◽  
Baorong Hou
Keyword(s):  
Superhydrophobic Surface ◽  
Low Cost ◽  
Aluminum Substrate ◽  
One Step ◽  
Self Cleaning ◽  
Anticorrosion Properties

Superhydrophobic surface was successfully fabricated via a facile, low-cost one-step electrodeposition approach on aluminum substrate with excellent anticorrosion and self-cleaning properties.

scholarly journals One-Step Preparation of Super-Hydrophobic Micro-Nano Dendrites on Al Alloy for Enhanced Corrosion Resistance

Metals ◽  
2018 ◽  
Vol 8 (11) ◽  
pp. 960 ◽  
Author(s):  
Xuewu Li ◽  
Tian Shi ◽  
Ben Li ◽  
Chuanwei Zhang ◽  
Bin Zhong ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Low Cost ◽  
Hydrophobic Surface ◽  
Al Alloys ◽  
Al Alloy ◽  
Ocean Engineering ◽  
Acid Modification ◽  
Sliding Angle ◽  
Corrosion Failure ◽  
One Step

Corrosion failure is a thorny issue that restricts the applications of Al alloys. As a research hotspot in functional realization, hydrophobic fabrication exactly offers an efficient method to settle metallic corrosions. This work has developed a facile and low-cost method to enhance corrosion resistance of Al alloys. The micro-nano dendrites have been firstly prepared on metallic substrate using one-step potentiostatic deposition. Then, wetting and electrochemical behaviors have been systematically investigated after stearic acid modification. Results show that the as-prepared surface possesses amplified and durable water repellence with an apparent contact angle (CA) of 154.2° and a sliding angle (SA) of 4.7°. Meanwhile, owing to the trapped air in dendrites, the newly-generated solid-air-liquid interfaces help to resist seawater penetration by reducing interfacial interactions on the super-hydrophobic surface as well as significantly enhance its corrosion resistance. This work sheds positive insights into extending the applications of Al alloys in many areas, especially for ocean engineering fields.

Dual Nickel/Palladium-Catalyzed Reductive Cross-Coupling Reactions Between Two Phenol Derivatives

2020 ◽  
Author(s):  
Baojian Xiong ◽  
Yue Li ◽  
Yin Wei ◽  
Søren Kramer ◽  
Zhong Lian
Keyword(s):  
Functional Group ◽  
Low Cost ◽  
Cross Coupling ◽  
Coupling Reactions ◽  
Phenol Derivatives ◽  
Cross Coupling Reactions ◽  
Palladium Catalyzed ◽  
One Step ◽  
Aryl Tosylates ◽  
Low Sensitivity

Cross-coupling between substrates that can be easily derived from phenols is highly attractive due to the abundance and low cost of phenols. Here, we report a dual nickel/palladium-catalyzed reductive cross-coupling between aryl tosylates and aryl triflates; both substrates can be accessed in just one step from readily available phenols. The reaction has a broad functional group tolerance and substrate scope (>60 examples). Furthermore, it displays low sensitivity to steric effects demonstrated by the synthesis of a 2,2’disubstituted biaryl and a fully substituted aryl product. The widespread presence of phenols in natural products and pharmaceuticals allow for straightforward late-stage functionalization, illustrated with examples such as Ezetimibe and tyrosine. NMR spectroscopy and DFT calculations indicate that the nickel catalyst is responsible for activating the aryl triflate, while the palladium catalyst preferentially reacts with the aryl tosylate.

Surface Modification of Poly(Vinylchloride) for Manufacturing Advanced Catheters

2020 ◽  
Vol 27 (10) ◽  
pp. 1616-1633 ◽  
Author(s):  
Oana Cristina Duta ◽  
Aurel Mihail Ţîţu ◽  
Alexandru Marin ◽  
Anton Ficai ◽  
Denisa Ficai ◽  
...  
Keyword(s):  
Surface Modification ◽  
Chemical Modification ◽  
Medical Devices ◽  
Low Cost ◽  
Physical And Mechanical Properties ◽  
Polymeric Materials ◽  
Modern Medicine ◽  
Structural Failure ◽  
Chemical Grafting ◽  
One Step

Polymeric materials, due to their excellent physicochemical properties and versatility found applicability in multiples areas, including biomaterials used in tissue regeneration, prosthetics (hip, artificial valves), medical devices, controlled drug delivery systems, etc. Medical devices and their applications are very important in modern medicine and the need to develop new materials with improved properties or to improve the existent materials is increasing every day. Numerous reasearches are activated in this domain in order to obtain materials/surfaces that does not have drawbacks such as structural failure, calcifications, infections or thrombosis. One of the most used material is poly(vinylchloride) (PVC) due to its unique properties, availability and low cost. The most common method used for obtaining tubular devices that meet the requirements of medical use is the surface modification of polymers without changing their physical and mechanical properties, in bulk. PVC is a hydrophobic polymer and therefore many research studies were conducted in order to increase the hydrophilicity of the surface by chemical modification in order to improve biocompatibility, to enhance wettability, reduce friction or to make lubricious or antimicrobial coatings. Surface modification of PVC can be achieved by several strategies, in only one step or, in some cases, in two or more steps by applying several techniques consecutively to obtain the desired modification / performances. The most common processes used for modifying the surface of PVC devices are: plasma treatment, corona discharge, chemical grafting, electric discharge, vapour deposition of metals, flame treatment, direct chemical modification (oxidation, hydrolysis, etc.) or even some physical modification of the roughness of the surface.

scholarly journals Superhydrophobicity and Durability in Recyclable Polymers Coating

2021 ◽  
Vol 13 (15) ◽  
pp. 8244
Author(s):  
Francesca Cirisano ◽  
Michele Ferrari
Keyword(s):  
Thermal Treatment ◽  
Superhydrophobic Surface ◽  
Low Cost ◽  
Spray Coating ◽  
Large Area ◽  
Average Roughness ◽  
Water Contact ◽  
Alkaline Environments ◽  
Fine Control ◽  
Recycle And Reuse

Highly hydrophobic and superhydrophobic materials obtained from recycled polymers represent an interesting challenge to recycle and reuse advanced performance materials after their first life. In this article, we present a simple and low-cost method to fabricate a superhydrophobic surface by employing polytetrafluoroethylene (PTFE) powder in polystyrene (PS) dispersion. With respect to the literature, the superhydrophobic surface (SHS) was prepared by utilizing a spray- coating technique at room temperature, a glass substrate without any further modification or thermal treatment, and which can be applied onto a large area and on to any type of material with some degree of fine control over the wettability properties. The prepared surface showed superhydrophobic behavior with a water contact angle (CA) of 170°; furthermore, the coating was characterized with different techniques, such as a 3D confocal profilometer, to measure the average roughness of the coating, and scanning electron microscopy (SEM) to characterize the surface morphology. In addition, the durability of SH coating was investigated by a long-water impact test (raining test), thermal treatment at high temperature, an abrasion test, and in acidic and alkaline environments. The present study may suggest an easy and scalable method to produce SHS PS/PTFE films that may find implementation in various fields.

scholarly journals Novel BiOBr by compositing low-cost biochar for efficient ciprofloxacin removal: the synergy of adsorption and photocatalysis on the degradation kinetics and mechanism insight

RSC Advances ◽  
2021 ◽  
Vol 11 (25) ◽  
pp. 15369-15379
Author(s):  
Wandi Song ◽  
Jianghua Zhao ◽  
Xiuhong Xie ◽  
Wang Liu ◽  
Shuxia Liu ◽  
...  
Keyword(s):  
Synergistic Effect ◽  
Solvothermal Method ◽  
Degradation Kinetics ◽  
Low Cost ◽  
Kinetics And Mechanism ◽  
One Step ◽  
Ciprofloxacin Removal

1. The C-loaded BiOBr was synthesized via a one-step solvothermal method. 2. C/BiOBr showed an obvious synergistic effect of adsorption and photocatalysis on the degradation of ciprofloxacin.

scholarly journals The electrochemical behavior of an aluminum alloy anode for rechargeable Al-ion batteries using an AlCl3–urea liquid electrolyte

RSC Advances ◽  
2017 ◽  
Vol 7 (51) ◽  
pp. 32288-32293 ◽  
Author(s):  
Chen Wang ◽  
Junfeng Li ◽  
Handong Jiao ◽  
Jiguo Tu ◽  
Shuqiang Jiao
Keyword(s):  
Aluminum Alloy ◽  
Electrochemical Behavior ◽  
Low Cost ◽  
Pyrolytic Graphite ◽  
Liquid Electrolyte ◽  
Al Alloy ◽  
Alloy Anode ◽  
Aluminum Alloy Anode

A novel Al-ion battery based on an Al alloy anode, pyrolytic graphite paper cathode, and low-cost AlCl3–urea liquid analogue electrolyte was successfully established. The present Al alloy/PG battery can afford a capacity as high as 105 mA h g−1.

EFFECT OF HYDROTHERMAL TIME ON THE GROWTH OF ZnO NANORODS

2020 ◽  
pp. 84-91
Author(s):  
Hanh
Keyword(s):  
Printed Circuit Board ◽  
Low Cost ◽  
Cell Structure ◽  
Zno Nanorods ◽  
Zinc Nitrate ◽  
Circuit Board ◽  
Nitrate Hexahydrate ◽  
Hydrothermal Time ◽  
One Step ◽  
Surface Morphologies

In this work, ZnO nanorods (NRs) were successfully grown on printed circuit board substrates (PCBs) by utilizing a one-step, seedless, low-cost hydrothermal method. It was shown that by implementing a galvanic cell structure in an aqueous solution of 80 mM of zinc nitrate hexahydrate and hexamethylenetetramine, ZnO NRs can directly grow on the PCBs substrate without the assistance of a seed layer. The effect of hydrothermal time on the surface morphologies, and the crystallinity of the as-grown ZnO nanorods (NRs) was also investigated. The as-grown ZnO NRs also exhibited a significant enhancement in vertical growth and their crystallinity with 5 hour growth.

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