دانلود رایگان مقاله لاتین پوشش فوق آبگریز مقاوم توسط سیلوکسان فلوئوردار از سایت الزویر
عنوان فارسی مقاله:
پوشش فوق آبگریز مقاوم توسط سیلوکسان فلوئوردار thiol-ene
عنوان انگلیسی مقاله:
Robust, self-healing, superhydrophobic coatings highlighted by a novel branched thiol-ene fluorinated siloxane nanocomposites
سال انتشار : 2016
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مقدمه انگلیسی مقاله:
1. Introduction
Superhydrophobic surface that displays contact angle (CA) above 150 and contact angle hysteresis (CAH) below 10 shows excellent water repellency [1e3]. The emerging applications such as self-cleaning [4], anti-icing [5], anti-bacterial [6], drag-reduction [7], water/oil separation [8], energy conversion and storage [9], have attracted much attention in both scientific and industrial areas. And the superhydrophobic and self-healing coatings that could repel toxic and corrosive liquids are highly desirable [10]. Two essential protocols of superhydrophobic surfaces, low surface energy and multiscale surface roughness, were first confirmed [11,12]. Recently, great progresses including etching [13,14], lithography [15], electrodeposition [16], physical/chemical vapor deposition [17,18], electrospinning [19], self-assembly [20], template synthesis [21], sol-gel process [22], and hot-pressing method [23] have been made in preparing superhydrophobic surfaces, however, some challenges still remain to overcome in technologies to coatings. The major issue that needs to be confronted is the durability [24,25].As a result of the fragility of the micro/nano-scopic roughness features that are necessary for superhydrophobicity, most superhydrophobic surfaces are low in mechanical robustness [26]. To improve the durability, several strategies have been developed, such as crosslinking [27,28], self-healing [29e31] or hierarchical roughening [21,30]. Beside, nanoparticles and fibers (e.g., SiO2, ZnO, TiO2 and CNT) are often applied to the superhydrophobic coating preparation, which drastically improve wear resistance and water repellency [22,32e35]. Typically, Lin's group used crosslinked Polydimethylsiloxane (PDMS) filled with fluorinated alkyl silane (FAS) functionalised silica nanoparticles and FAS to prepare highly durable superhydrophobic fabrics. After 28 000 cycles of Martindale abrasion with wool felt under 12 KPa, the water contact angle (WCA) still showed above 150 and the nanoscale roughness could still be observed [36]. They also reported a self-healing superamphiphobic fabric coating that was prepared from hydrolyzed fluoroalkyl silane (FAS) containing well-dispersed fluorinateddecyl polyhedral oligomeric silsequioxane (FD-POSS) [37].Another important challenge is a rapid, highly efficient fabrication [38e40]. It is a remarkable fact that sol-gel and click chemistry representing rapid, highly efficient methods have marked a major escalation in applications [41,42]. Recently, Li et al. presented a simple strategy for fabricating of superamphiphobic coatings using spray-deposition and UV photopolymerization of thiol-ene resins that contained hydrophobic silica nanoparticles and perfluorinated thiols. The WCA remained above 150 after 200 abrasion cycles with 2000 grit sandpaper under 0.25 KPa [40]. Herein, to fix these problems, a superhydrophobic fabric after being dip-coated with polydimethylsiloxane (PDMS), novel branched fluorinated siloxane (T-FAS) and hydrophobic fumed silica nanoparticles (SiO2 NPs) was reported. The novel branched TFAS was prepared by introducing (N-methyl-perfluorohexane-1- sulfonamide) ethyl acrylate (FSA) and g-methacryloxypropyltrimethoxysilane (MPS) into pentaerythritol tetra (3- mercaptopropionate) (PETMP) via thiol-ene click reaction. The branched T-FAS uses an average of two long fluoroalkyl chains as self-healing superhydrophobic arms and hydrolysable silane chains as durable bodies, respectively, being more reactive and flexible than FAS meanwhile practical than thiol-ene photopolymerization. When exposed to air, the rapidly hydrolysable T-FAS combines PDMS and SiO2 NPs into the IPN which displays remarkable durability against severe abrasion damages. Two other long perfluoroterminated chains via T-FAS overall connected to the networks can spontaneously reorient to new air interfaces for self-healing superhydrophobicity against chemically etching. Most notable among these should be the highly durable crosslinking IPN with self-healing properties.
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کلمات کلیدی:
Superhydrophobic surfaces for corrosion protection: a review of recent ... link.springer.com/article/10.1007/s11998-015-9744-6 by D Zhang - 2016 - Cited by 10 - Related articles Oct 19, 2015 - Journal of Coatings Technology and Research. January ... Superhydrophobic surface Corrosion protection Wetting Microstructures Self-healing. Entropy | Free Full-Text | Anti-Icing Superhydrophobic Surfaces ... - MDPI www.mdpi.com/1099-4300/18/4/132/htm by R Ramachandran - 2016 - Cited by 6 - Related articles Apr 12, 2016 - Although superhydrophobic surfaces are not always icephobic, the theoretical ... Entropic Molecular Interactions to Design Novel Icephobic Concrete ... This is why surface coatings that prevent ice buildup or reduce ice adhesion ..... snow crystal suggests an apparent synchronization between the branches ... Simple Strategy for Producing Superhydrophobic Nanocomposite ... pubs.acs.org/doi/abs/10.1021/am401826g by DS Facio - 2013 - Cited by 44 - Related articles Jul 15, 2013 - Numerous superhydrophobic materials have been developed in recent years .... superhydrophobic coatings highlighted by a novel branched ... Fabrication of Superhydrophobic Copper Surface on Various ... pubs.acs.org/doi/abs/10.1021/am5072892?src=recsys Nov 24, 2014 - The fabrication of as-prepared superhydrophobic surfaces was accomplished .... superhydrophobic coatings highlighted by a novel branched ... Branched Hydrocarbon Low Surface Energy Materials for ... pubs.acs.org/doi/full/10.1021/acsami.5b09784 by S Alexander - 2015 - Cited by 23 - Related articles Dec 7, 2015 - These branched chains are new low surface energy materials (LSEMs) which ..... It is known that superhydrophobic coatings formed of textured structures .... A novel deposition technique for fluorocarbon films and its applications for ..... The ramifications of oil spill accidents highlight the difficulty of achieving ...
