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Reza Jafari

Bio: Reza Jafari is an academic researcher from Université du Québec. The author has contributed to research in topics: Contact angle & Coating. The author has an hindex of 20, co-authored 50 publications receiving 1496 citations. Previous affiliations of Reza Jafari include Hydro-Québec & Pierre-and-Marie-Curie University.


Papers
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Journal ArticleDOI
TL;DR: In this article, a review of recent advances in the application of super-hydrophobic surfaces to act as corrosion barriers is provided, which can offer great resistance to corrosion due to the possibility of minimizing the contact area between liquids and a surface.
Abstract: This review provides an overview of recent advances in the application of superhydrophobic surfaces to act as corrosion barriers. The adverse consequences of corrosion are a serious and widespread problem resulting in industrial plant shutdowns, waste of valuable resources, reduction in efficiency, loss or contamination of products, and damage to the environment. Superhydrophobic surfaces, inspired by nature, can be considered as an alternative means for improving the protection of metals against corrosion. Due to the possibility of minimizing the contact area between liquids and a surface, superhydrophobic surfaces can offer great resistance to corrosion. Artificial superhydrophobic surfaces have been developed with the potential of being applied in numerous settings including self-cleaning, anti-icing, oil-water separation, and especially anti-corrosion applications. In this paper, we review the concept of superhydrophobicity through presentation of different theoretical models. The fabrication and application of superhydrophobic surfaces are presented, and we then discuss the use of superhydrophobic coatings as barriers against the corrosion of metals.

359 citations

Journal ArticleDOI
TL;DR: In this paper, a superhydrophobic and ice-phobic surface was investigated on aluminum alloy substrate, where anodizing was used to create a micro-nanostructured aluminum oxide underlayer on the alloy substrate.

194 citations

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TL;DR: A brief introduction to the concept of superhydrophobicity and plasma is presented, then plasma-based techniques are divided into three main categories and studied as to their applications in development of super-hydrophobic surfaces as discussed by the authors.
Abstract: Superhydrophobic surfaces, originally inspired by nature, have gained a lot of interest in the past few decades. Superhydrophobicity is a term attributed to the low adhesion of water droplets on a surface, leading to water contact angles higher than 150°. Due to their vast variety of possible applications, ranging from biotechnology and textile industry to power network management and anti-fouling surfaces, many methods have been utilized to develop superhydrophobic surfaces. Among these methods, plasma technology has proved to be a very promising approach. Plasma technology takes advantage of highly reactive plasma species to modify the functionality of various substrates. It is one of the most common surface treatment technologies which is widely being used for surface activation, cleaning, adhesion improvement, anti-corrosion coatings and biomedical coatings. In this paper, recent advances in the applications of plasma technology in the development of superhydrophobic surfaces are discussed. At first, a brief introduction to the concept of superhydrophobicity and plasma is presented, then plasma-based techniques are divided into three main categories and studied as to their applications in development of superhydrophobic surfaces.

118 citations

Journal ArticleDOI
TL;DR: In this paper, the authors presented a view on ice repellency of superhydrophobic surfaces in terms of contact angle hysteresis, surface roughness and icing condition.

110 citations

Journal ArticleDOI
TL;DR: In this article, the influence of processing parameters on the quality of final parts and the precision of final product dimensions in both thermoplastic polymers and rubber materials is discussed and compared.
Abstract: Micro injection molding is in great demand due to its efficiency and applicability for industry. Polymer surfaces having micro-nanostructures can be produced using injection molding. However, it is not as straightforward as scaling-up of conventional injection molding. The paper is organized based on three main technical areas: mold inserts, processing parameters, and demolding. An accurate set of processing parameters is required to achieve precise micro injection molding. This review provides a comparative description of the influence of processing parameters on the quality of final parts and the precision of final product dimensions in both thermoplastic polymers and rubber materials. It also highlights the key parameters to attain a high quality micro-nanostructured polymer and addresses the contradictory effects of these parameters on the final result. Moreover, since the produced part should be properly demolded to possess a high quality textured polymer, various demolding techniques are assessed in this review as well.

107 citations


Cited by
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Journal ArticleDOI
TL;DR: Different strategies to achieve ice repellency on various hydrophilic and hydrophobic surfaces are reviewed with a focus on the recent development of superhydrophobic and lubricant-infused surfaces.
Abstract: Ice repellency can be achieved on various hydrophilic and hydrophobic surfaces, although a surface that repels ice under all environmental scenarios remains elusive. Different strategies are reviewed with a focus on the recent development of superhydrophobic and lubricant-infused surfaces.

979 citations

Journal ArticleDOI
10 Mar 2014-ACS Nano
TL;DR: Effectively trapping air in surface textures of superhydrophobic surfaces weakens the interaction of the surfaces with liquid water, which enables timely removal of impacting and condensed water droplets before freezing occurs.
Abstract: Undesired ice accumulation leads to severe economic issues and, in some cases, loss of lives. Although research on anti-icing has been carried out for decades, environmentally harmless, economical, and efficient strategies for anti-icing remain to be developed. Recent researches have provided new insights into the icing phenomenon and shed light on some promising bio-inspired anti-icing strategies. The present review critically categorizes and discusses recent developments. Effectively trapping air in surface textures of superhydrophobic surfaces weakens the interaction of the surfaces with liquid water, which enables timely removal of impacting and condensed water droplets before freezing occurs. When ice already forms, ice adhesion can be significantly reduced if liquid is trapped in surface textures as a lubricating layer. As such, ice could be shed off by an action of wind or its gravity. In addition, bio-inspired anti-icing strategies via trapping or introducing other media, such as phase change mate...

715 citations

Journal ArticleDOI
15 Jul 2013
TL;DR: The aim of this paper is to review the recent progresses in preparing manmade superhydrophobic surfaces and to describe the methods and techniques used to fabricate these surfaces.
Abstract: The interest in superhydrophobic surfaces has grown exponentially over recent decades. Since the lotus leaf dual hierarchical structure was discovered, researchers have investigated the foundations of self-cleaning behavior. Generally, surface micro/nanostructuring combined with low surface energy of materials leads to extreme anti-wetting properties. The great number of papers on this subject attests the efforts of scientists in mimicking nature to generate superhydrophobicity. Besides the thirst for knowledge, scientists have been driven by the many possible industrial applications of superhydrophobic materials in several fields. Many methods and techniques have been developed to fabricate superhydrophobic surfaces, and the aim of this paper is to review the recent progresses in preparing manmade superhydrophobic surfaces.

603 citations

Journal ArticleDOI
TL;DR: The objective of the present review is to show examples of polymer/metal composites designed to have antimicrobial activities, with a special focus on copper and silver metal nanoparticles and their mechanisms.
Abstract: Metals, such as copper and silver, can be extremely toxic to bacteria at exceptionally low concentrations. Because of this biocidal activity, metals have been widely used as antimicrobial agents in a multitude of applications related with agriculture, healthcare, and the industry in general. Unlike other antimicrobial agents, metals are stable under conditions currently found in the industry allowing their use as additives. Today these metal based additives are found as: particles, ions absorbed/exchanged in different carriers, salts, hybrid structures, etc. One recent route to further extend the antimicrobial applications of these metals is by their incorporation as nanoparticles into polymer matrices. These polymer/metal nanocomposites can be prepared by several routes such as in situ synthesis of the nanoparticle within a hydrogel or direct addition of the metal nanofiller into a thermoplastic matrix. The objective of the present review is to show examples of polymer/metal composites designed to have antimicrobial activities, with a special focus on copper and silver metal nanoparticles and their mechanisms.

556 citations

Journal ArticleDOI
TL;DR: This review is an exhaustive representation of the electrochemical processes reported in the literature to produce superhydrophobic surfaces using low-cost, reproducible and fast methods.
Abstract: This review is an exhaustive representation of the electrochemical processes reported in the literature to produce superhydrophobic surfaces. Due to the intensive demand in the elaboration of superhydrophobic materials using low-cost, reproducible and fast methods, the use of strategies based on electrochemical processes have exponentially grown these last five years. These strategies are separated in two parts: the oxidation processes, such as oxidation of metals in solution, the anodization of metals or the electrodeposition of conducting polymers, and the reduction processed such as the electrodeposition of metals or the galvanic deposition. One of the main advantages of the electrochemical processes is the relative easiness to produce various surface morphologies and a precise control of the structures at a micro- or a nanoscale.

371 citations