Download or read book Sol Gel Nanotitania Coating for Improved Surface Properties of Metals written by Nayak Suryakanta and published by LAP Lambert Academic Publishing. This book was released on 2014 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sol-gel technique is one of the simplest techniques to prepare thin films and can provide almost single- or multi-component oxide coating on glass or metals surface. Coatings prepared by this technique have shown excellent chemical stability, oxidation control, and enhanced corrosion resistance for metal substrate. This book focuses on the advantages of nanostructured titanium dioxide coatings to many engineering applications and also explains the mechanisms of formation of the nanostructured titanium dioxide coatings including significant mechanical and physical properties. It also explains the structural properties of the nano-structured titania coatings. This book also illustrates the factors affecting particle size and morphology of titania coated samples.

Download or read book Sol TiO2 Enhanced Nanocomposite Silver Coatings by Electroplating written by Bo Hu and published by . This book was released on 2015 with total page 91 pages. Available in PDF, EPUB and Kindle. Book excerpt: Electroplating as a surface treatment technology can significantly improve the properties of working parts and components which has been widely applied in a variety of technical fields. Recently this surface treatment technology has been developed to synthesize nanocomposite coatings. The nanocomposite coatings show a significantly improved mechanical properties due to the second-phase dispersed nanoparticles in the coating matrix. However, it is hard to realize a good suspension of solid nano-sized particles in a plating solution and good dispersion of nano-sized particles in the composite coatings because of the large surface energy of nano-particles. The traditional methods such as magnetic agitation, air injection, and ultrasonic vibration are always difficult to fully prevent agglomeration of nano-sized particles as the surface effect. To achieve a good dispersion of the nanoparticles in composite coatings, sol-gel enhanced electroplating is developed at the University of Auckland and intensively investigated. The aim of this research is to study the electroplating of sol enhanced Ag/TiO2 composite coatings. In the present thesis, TiO2 solid particles and a transparent TiO2 sol was added into a traditional cyanide silver electroplating electrolyte in order to prepare two different types of composite coatings. The research was started with an electroplating of pure silver coatings from traditional cyanide bath. Then investigations were carried out on the solid powder enhanced composite coatings and sol-enhanced composite coatings focused on the effect of the powder and sol concentration. The microstructure, mechanical properties, electrical properties as well as colour difference of the composite coating were investigated in the research. Both of the sol and powder enhanced electroplating successfully added dispersed TiO2 nanoparticles into the Ag coating matrix and improved the mechanical properties compared to the pure silver coating. The sol enhanced nanocomposite coatings shows better dispersion and mechanical properties.

Download or read book Sol Gel Method written by Guadalupe Valverde Aguilar and published by BoD – Books on Demand. This book was released on 2019-02-13 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt: The sol-gel method is a powerful route of synthesis used worldwide. It produces bulk, nano- and mesostructured sol-gel materials, which can encapsulate metallic and magnetic nanoparticles, non-linear azochromophores, perovskites, organic dyes, biological molecules, etc.. This can have interesting applications for catalysis, photocatalysis; drug delivery for treatment of neurodegenerative diseases such as cancer, Parkinson's and Azheimer's. In this book, valuable contributions related to novel materials synthesized by the sol-gel route are provided. The effect of the sol-gel method to synthesize these materials with potential properties is described, and how the variation of the parameters during the synthesis influences their design and allows to adjust their properties according to the desired application is discussed.

Download or read book Nanocomposite Coatings Deposited by Sol Enhanced Electrochemical Methods written by Yuxin Wang and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Nano-composite coatings have wide applications for their superior mechanical and corrosion properties. Many efforts have been devoted to the development of different types of nano-composite coatings in the last decade. Various techniques are used to modify the coating microstructure at the nano scale in order to further improve the properties of coatings. We recently developed a novel method which combines sol-gel process and electrochemical deposition process to produce nano-composite coatings. This simple method can lead to a highly dispersed distribution of oxide nano-particles in the metal coating matrix, resulting in significantly improved mechanical properties. This Chapter introduces the principle of this innovative method, the basic theory behind the deposition process, and an overview of current results. It also describes the dopant technology that is derived from this novel technique. The future development potentials and industrial applications of these coatings are also discussed.

Download or read book Handbook of sol gel science and technology 1 Sol gel processing written by Sumio Sakka and published by Springer Science & Business Media. This book was released on 2005 with total page 716 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since Dr. Disiich of Germany prepared a glass lens by the sol-gel method around 1970, sol-gel science and technology has continued to develop. Since then this field has seen remarkable technical developments as well as a broadening of the applications of sol-gel science and technology. There is a growing need for a comprehensive reference that treats both the fundamentals and the applications, and this is the aim of "Handbook of Sol-Gel Science and Technology."The primary purpose of sol-gel science and technology is to produce materials, active and non-active including optical, electronic, chemical, sensor, bio- and structural materials. This means that sol-gel science and technology is related to all kinds of manufacturing industries. Thus Volume 1, "Sol-Gel Processing," is devoted to general aspects of processing. Newly developed materials such as organic-inorganic hybrids, photonic crystals, ferroelectric coatings, photocatalysts will be covered. Topics in this volume include: Volume 2, "Characterization of Sol-Gel Materials and Products, "highlights the important fact that useful materials are only produced when characterization is tied to processing. Furthermore, characterization is essential to the understanding of nanostructured materials, and sol-gel technology is a most important technology in this new field. Since nanomaterials display their functional property based on their nano- and micro-structure, "characterization" is very important. Topics found in Volume 2 include: Sol-gel technology is a versatile technology, making it possible to produce a wide variety of materials and to provide existing substances with novel properties. This technology was applied to producingnovel materials, for example organic-inorganic hybrids, which are quite difficult to make by other fabricating techniques, and it was also applied to producing materials based on high temperature superconducting oxides. "Applications of Sol-Gel Technology," (Volume 3), will cover applications such as:

Download or read book Handbook of Sol Gel Science and Technology written by Lisa Klein and published by Springer Nature. This book was released on 2018-05-31 with total page 3755 pages. Available in PDF, EPUB and Kindle. Book excerpt: This completely updated and expanded second edition stands as a comprehensive knowledgebase on both the fundamentals and applications of this important materials processing method. The diverse, international team of contributing authors of this reference clarify in extensive detail properties and applications of sol-gel science and technology as it pertains to the production of substances, active and non-active, including optical, electronic, chemical, sensor, bio- and structural materials. Essential to a wide range of manufacturing industries, the compilation divides into the three complementary sections: Sol-Gel Processing, devoted to general aspects of processing and recently developed materials such as organic-inorganic hybrids, photonic crystals, ferroelectric coatings, and photocatalysts; Characterization of Sol-Gel Materials and Products, presenting contributions that highlight the notion that useful materials are only produced when characterization is tied to processing, such as determination of structure by NMR, in-situ characterization of the sol-gel reaction process, determination of microstructure of oxide gels, characterization of porous structure of gels by the surface measurements, and characterization of organic-inorganic hybrid; and Applications of Sol-Gel Technology, covering applications such as the sol-gel method used in processing of bulk silica glasses, bulk porous gels prepared by sol-gel method, application of sol-gel method to fabrication of glass and ceramic fibers, reflective and antireflective coating films, application of sol-gel method to formation of photocatalytic coating films, and application of sol-gel method to bioactive coating films. The comprehensive scope and integrated treatment of topics make this reference volume ideal for R&D scientists and engineers across a wide range of disciplines and professional interests.

Download or read book Organic inorganic Hybrid Sol gel Coatings as Eco friendly Surface Pretreatment for Corrosion Protection of Aluminum Alloy written by Mahshid Niknahad and published by . This book was released on 2016 with total page 183 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pretreatments are thin, adherent, and protective layers deposited directly on cleaned metal surfaces to enhance the performance of the multi-coat finishing system on metal and alloy substrates. Regulatory and environmental considerations dictate that industries replace the extant toxic and hazardous chromate-based pretreatments used for aluminum alloys with more sustainable ones. Two new families of organic-inorganic hybrid (OIH) pretreatments for aluminum alloys have been developed using customized silane-type sol-gel precursors--Epoxy-silane and Bis-ureasil--as primary components. Two series of sol-gel compositions varying in concentrations of silane precursor, organic corrosion inhibitor, and nano-silica particles have been prepared and used to deposit OIH pretreatments on aluminum alloy substrates (AA-2024-T3). The corrosion resistance performance of these OIH pretreatments has been studied by electrochemical impedance spectroscopy (EIS), direct current (DC) polarization resistance, and neutral salt spray test and compared with the resistance performance conventional hexavalent chromium-based pretreatment, as a benchmark and industry standard for Al alloys. This research specifically investigates the effects of key components of sol-gel compositions on the corrosion performance of the OIH pretreatments on Al-2024-T3. Using the Box-Behnken Design of Experiment (DoE) methodology and Minitab software for analysis, the key factors affecting corrosion performance have been identified and sol-gel compositions optimized. This study revealed that for both families of OIH pretreatments, the film deposited in the sol-gel bath containing 25% by weight of precursor provided the best performance. Furthermore, incorporation of nano-silica particles to an optimum level of 5% by weight led to a remarkable improvement of the corrosion-resistance performance of the pretreatments for both families. This study has also very clearly shown that the use of the organic corrosion inhibitor mercaptobenzthiazole is effective in enhancing the corrosion-resistance performance of both families of pretreatments when used at the optimum level of 3% by weight. A comparison of the corrosion-resistance performance of the two families of OIH pretreatments with chromate conversion coating (control) showed that pretreatments based on epoxy-silane precursor when used at optimum compositions clearly outperform chromate conversion coatings used as a control in this study. Furthermore, OIH based on a bis-ureasil precursor, while showing a slightly lower performance than its epoxy-silane counterpart, is comparable or slightly superior to the commercial conversion coating when used at optimum compositions.

Download or read book Sol Gel Films written by Maritza Paez and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Aluminum alloys used in aeronautical industry are susceptible to corrosion. The solution to this problem is base chromate materials, which have been heavily regulated and restricted. The development of alternatives begins in the 1970s and the 2000s, where some potential methodologies were established. The sol-gel process is one of these methods, in which thin oxide layers are deposited on the metal substrate. An important aspect is the fact of possible combinations among types of oxides and the incorporation of an organic compound to improve the performance of the films; moreover, this allows the addition of inhibitors and nanomaterials, making this method an interesting and versatile way to obtain a coating. In this chapter, we will describe the importance of the use of coating synthesized via sol-gel in the corrosion protection of metal surfaces. The advantages and disadvantages of using modified sol-gel polymer films and hybrid system coatings will also be discussed, as well as the methodologies for the chemical characterization and the feasibility of evaluating the mechanical properties of the coatings.

Download or read book Development of Hydrophobic Inorganic organic Hybrid Sol gel Coatings on Aluminium Using Nano particles written by Ruchi Grover Wankhede and published by . This book was released on 2014 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt: Water-based inorganic-organic hybrid sol-gel coatings were developed on aluminium. The coatings were based upon epoxy-silane, glycidoxypropyltrimethoxysilane (GPTMS) and methyltrimethoxysilane (MTMS) as inorganic silane precursors crosslinked with the organic polymer, hexamethylmethoxymelamine (HMMM). The aim of the present work was to modify the hybrid sol-gel coating to obtain hydrophobic properties which could be achieved by either lowering the surface energy or increasing the surface roughness of the coatings. Lowering of surface energy was achieved by incorporating various fluoro-alkylsilanes (FASs) with two different chain lengths, of 3 and 17 fluorine atoms. The subsequent water contact angles achieved were 100° and 110° respectively for FAS modification. As a result, a commercial fluoro emulsion (FE) which was a water based six carbon atom perfluoro polymer, was employed as co-precursor. A substantial improvement in hydrophobicity was achieved with FE modification resulting in contact angle of 118°. Further, the surface roughness of the fluorinated sol-gel coating was enhanced by incorporating various nano-particles with different size, surface area and surface chemistry, namely nano-Zinc Oxide (ZnO), hexadecyltrimethoxysilane (HDTMS) modified nano-silica, dichlorodimethylsilane (DDS) modified nano-silica and hexamethyldisilazane (HMDZ) modified nano-silica. Out of these HMDZ nano-silica modification resulted in maximum hydrophobicity with contact angle of 125° and sliding angle of 25° on aluminium surface. Furthermore an independent study was carried out on application of as developed composite coatings on chemically and mechanically roughened aluminium surfaces. It was found that contact angle increases up to 130° using techniques like chemical etching, plasma etching, sand blasting and grinding etc. The as developed nano-composite coatings when applied on other non-metallic substrate such as glass, cotton, cardboard, paper, concrete and wood, it showed excellent hydrophobicity with a contact angle of > 135°. Furthermore, all the substrates showed a sliding angle of about 15°.The as developed coatings were characterised for their chemical and morphological structures, using techniques including FTIR, XPS, SEM and AFM. The wetting properties were analysed using contact angle goniometry. The performance of the as developed coatings was evaluated by determining corrosion resistance, hardness, adhesion and scratch resistance properties. Finally, the role of nano-particles distribution was studied in detail. It was found that maximum hydrophobic properties were achieved at optimum concentration of nano-particles.

Download or read book Sol Gel Preparation and Characterization of Metal Silica and Metal Oxide Silica Nanocomposites written by G. Piccaluga and published by Trans Tech Publications Ltd. This book was released on 2000-02-21 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt: Materials with nanometer size particles exhibit unique chemical and physical properties. In particular, nanocomposite materials, composed of nanometric metal and metal oxide particles embedded in vitreous matrices, present a variety of interesting magnetic, electric and catalytic properties, that are strongly size-dependent. Among the different preparation methods which can be used to obtain this kind of materials, the sol-gel process is particularly interesting because it is affected by several parameters which allow a versatile control of the structural, textural and chemical properties of the final products. The present volume focusses on the preparation of metal-silica and metal oxide-silica (Me=Ni, Fe, Zn) nanocomposites by the sol-gel method and the characterization of their structural and magnetic properties.

Download or read book Sol gel derived Coatings for Corrosion Protection of Metal Surfaces written by Xiankui Hu and published by . This book was released on 2003 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Chemistry Materials and Properties of Surface Coatings written by Güngör Gündüz and published by DEStech Publications, Inc. This book was released on 2015-05-14 with total page 765 pages. Available in PDF, EPUB and Kindle. Book excerpt: Scientific reference covers all surface coatings, paint types, components and formulationsSolvent-, water-based, polymeric, metallic, anti-corrosion, powder and advanced active coatingsChemical equations, molecular configurations and polymer chains linked to key structure/property relationsTechnical details on specialized coatings for marine, automotive and aerospace This professional reference is a unified account of the chemistry and materials science of virtually all major resins, paints, polymeric and inorganic coatings. It offers uniform analyses of the chemical formulations and molecular structures of widely used solvent- and water-based paints and coatings, including discussions of binders, pigments and fillers. In the context of a scientific analysis of structure-property relations the book addresses adhesion, shelf-life, durability, volatility, hardness, mechanical, optical and other engineered qualities. Emerging active coatings such as conductive, self-cleaning, self-healing paints/coatings, plus eco-friendly powder coatings, are included.

Download or read book Investigation of Nanostructured Titanium Oxide from Surface Sol gel Processing for Biomaterial Applications written by Maria Athena C. Advincula and published by . This book was released on 2004 with total page 476 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Sol Gel Technology for Thin Films Fibers Preforms Electronics and Specialty Shapes written by Lisa C. Klein and published by William Andrew. This book was released on 1988 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt: Annotation Provides background and fundamentals and evaluates present technology. Main topics are thin films in optical, mechanical, and electrical applications; fibers in refractories, composite reinforcement, and thermal insulation; and special applications such as preforms, microballoons, and electronics. Articles are grouped under chemistry and phase transformations; coatings, thin films, and surface treatment; continuous, discontinuous, and woven fibers; monoliths, shapes, and preforms; and special applications. Annotation(c) 2003 Book News, Inc., Portland, OR (booknews.com)

Download or read book Handbook of Sol gel Science and Technology written by Lisa C. Klein and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book TiO2 Nanoparticles written by Aiguo Wu and published by John Wiley & Sons. This book was released on 2020-06-02 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt: A unique book that summarizes the properties, toxicology, and biomedical applications of TiO2-based nanoparticles Nanotechnology is becoming increasingly important for products used in our daily lives. Nanometer-sized titanium dioxide (TiO2) are widely used in industry for different purposes, such as painting, sunscreen, printing, cosmetics, biomedicine, and so on. This book summarizes the advances of TiO2 based nanobiotechnology and nanomedicine, covering materials properties, toxicological research, and biomedical application, such as antibacter, biosensing, and cancer theranostics. It uniquely integrates the TiO2 applications from physical properties, toxicology to various biomedical applications, and includes black TiO2 based cancer theranostics. Beginning with a comprehensive introduction to the properties and applications of nanoparticles, TiO2 Nanoparticles: Applications in Nanobiotechnology, Theranostics and Nanomedicine offers chapters on: Toxicity of TiO2 Nanoparticles; Antibacterial Applications of TiO2 Nanoparticles; Surface Enhanced Raman Spectrum of TiO2 Nanoparticle for Biosensing (TiO2 Nanoparticle Served as SERS Sensing Substrate); TiO2 as Inorganic Photosensitizer for Photodynamic Therapy; Cancer Theranostics of Black TiO2 Nanoparticles; and Neurodegenerative Disease Diagnostics and Therapy of TiO2-Based Nanoparticles. This title: -Blends the physical properties, toxicology of TiO2 nanoparticles to the many biomedical applications -Includes black TiO2 based cancer theranostics in its coverage -Appeals to a broad audience of researchers in academia and industry working on nanomaterials-based biosensing, drug delivery, nanomedicine TiO2 Nanoparticles: Applications in Nanobiotechnology, Theranostics and Nanomedicine is an ideal book for medicinal chemists, analytical chemists, biochemists, materials scientists, toxicologists, and those in the pharmaceutical industry.

Download or read book Titanium Dioxide TiO2 and Its Applications written by Francesco Parrino and published by Elsevier. This book was released on 2020-11-29 with total page 735 pages. Available in PDF, EPUB and Kindle. Book excerpt: Scientific interest in TiO2-based materials has exponentially grown in the last few decades. Titanium Dioxide (TiO2) and Its Applications introduces the main physicochemical properties of TiO2 which are the basis of its applications in various fields. While the basic principles of the TiO2 properties have been the subject of various previous publications, this book is mainly devoted to TiO2 applications. The book includes contributions written by experts from a wide range of disciplines in order to address titanium dioxide's utilization in energy, consumer, materials, devices, and catalytic applications. The various applications identified include: photocatalysis, catalysis, optics, electronics, energy storage and production, ceramics, pigments, cosmetics, sensors, and heat transfer. Titanium Dioxide (TiO2) and Its Applications is suitable for a wide readership in the disciplines of materials science, chemistry, and engineering in both academia and industry. Includes a wide range of current and emerging applications of titanium dioxide in the fields of energy, consumer applications, materials, and devices Provides a brief overview of titanium dioxide and its properties, as well as techniques to design, deposit, and study the material Discusses the relevant properties, preparation methods, and other apposite considerations in each application-focused chapter