Дисертації з теми "Cool coating"
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Sjödin, Isak. "Cool Roof Coatings on Industrial Buildings : An Energy Study of Reflective Coatings." Thesis, Umeå universitet, Institutionen för tillämpad fysik och elektronik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-157503.
Повний текст джерелаRosati, Andrea. "Smart coatings for energy saving buildings." Doctoral thesis, Università degli studi di Trento, 2022. https://hdl.handle.net/11572/355462.
Повний текст джерелаSzczurek, Eddy. "New approach to the analysis of ribbing in coil coating." Valenciennes, 2007. http://ged.univ-valenciennes.fr/nuxeo/site/esupversions/77201d13-7d32-45e8-9211-ec08a6b6c52e.
Повний текст джерелаL’enduction par rouleaux déformables est utilisée pour appliquer une épaisseur de liquide sur une bande en mouvement. Pendant l’application un défaut nommé “cordage” apparaît et se caractérise par des rides de peinture. L’épaisseur humide appliquée sur la bande est réglée par différents passages entre les rouleaux. L’épaisseur finale et la stabilité de l’application sont modifiées par les vitesses de rouleaux et les efforts de serrages. Le revêtement d’élastomère est utilisé pour appliquer des films plus minces et limiter le cordage. Dans cette étude, l’écoulement dans un contact déformable est présenté. Le but de ce travail est l’optimisation de l’application pour des conditions industrielles par la maîtrise des paramètres de contact à l’interface bande / rouleau. L’originalité de cette étude est la prise en compte des revêtements d’élastomère et de l’environnement industriel. Un test spécifique de compression est développé pour analyser le comportement de l’élastomère face aux sollicitations industrielles. Des modifications du module d’Young et du temps de relaxation sont observées en fonction de l’environnement. A partir de ces résultats des séries de Prony sont identifiées et seront utilisées pour modéliser le comportement viscoélastique de l’élastomère dans la simulation. Une modélisation éléments finis du procédé est réalisée via une architecture de simulation solide-fluide. La première simulation permet d’évaluer la pression dans le contact et la seconde permet d’obtenir l’épaisseur humide et la position de la surface libre. De plus, une étude expérimentale sur une tête d’enduction est réalisée pour corréler les résultats numériques et le procédé industriel
Adhami, Siavash. "The development of water-based primers for coil coating applications." Thesis, University of Surrey, 2017. http://epubs.surrey.ac.uk/813181/.
Повний текст джерелаFoster, Gary Marc. "Mechanical properties of coil coatings under controlled humidity." Thesis, University of Exeter, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.559098.
Повний текст джерелаGowenlock, Cathren. "Near infrared curing of high performance coil coatings." Thesis, Swansea University, 2014. https://cronfa.swan.ac.uk/Record/cronfa42537.
Повний текст джерелаSarma, Sreedhara. "Fluid Mechanics of High Speed Deformable Roll coating. An experimental and theoretical study of film thickness and stability in high speed deformable roll coating flow with Newtonian and non-Newtonian liquids." Thesis, University of Bradford, 2015. http://hdl.handle.net/10454/14842.
Повний текст джерелаZhang, Ying. "A spectroscopic study of the degradation of polyurethane coil coatings." Thesis, Queen Mary, University of London, 2012. http://qmro.qmul.ac.uk/xmlui/handle/123456789/3145.
Повний текст джерелаPowers, Catherine N. "A process for evaluating the benefits of near-infrared reflective roof coatings used on asphalt shingle roofs." Thesis, Georgia Institute of Technology, 2015. http://hdl.handle.net/1853/54478.
Повний текст джерелаHeinrich, Lydia Alexandra. "Biosourced Coating Systems for Metallic Substrates." Thesis, Lyon, 2017. http://www.theses.fr/2017LYSE1004.
Повний текст джерелаMoving away from petroleum and towards biobased materials not only leads to greater sustainability and lower dependence on diminishing fossil resources, but can also catalyse the discovery of new properties. Aliphatic polyesters based on renewable resources have already started to replace traditional products. Within the Sorago project, a fully biobased resin for interior coil coatings has recently been proposed on the market (Estetic® Bio Air, Arcelor Mittal). In order to extend the possible use of the biobased product to exterior applications, an improvement of its resistance to humidity and UV radiation is crucial. This presents two challenges: The limited availability of monomers which provide rigidity in the resin structure and the relationship between the resin composition and its weatherability. Vanillin was chosen as a possible extension to the range of rigid, biobased monomers for polyesterification reactions. The transformation of its aldehyde and its reactivity was studied in terms of catalytic activation and through a series of copolymerisations which revealed the influence of the reaction conditions on the composition of the product. A structure-property relationship concerning the coating glass transition temperature and visco-elastic behaviour of the coating was furthermore established for a series of renewable monomers and contrasted with petroleum based equivalents. Series of prototypes with a wide variety of properties were then subjected to accelerated weathering tests. Their degradation was followed directly by gloss retention and different mechanisms were revealed using FTIR, µ-hardness and film thickness measurements. While the performance of the biobased coating was subpar, no evidence linking its degradation to the presence of renewable monomers was found, suggesting that the creation of a sufficiently durable and renewable exterior coating will be possible
Aguiar, Fábio Eliseu Cardoso de [UNESP]. "Estudo eletroquímico da corrosão em chapas de aço galvanizado e fosfatizado por coil-coating." Universidade Estadual Paulista (UNESP), 2003. http://hdl.handle.net/11449/97123.
Повний текст джерелаFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
Neste trabalho estudou-se o comportamento eletroquímico e as características microestruturais de chapas de aço eletrozincado e zincado sem e com revestimentos de fosfatos, oriundos de diferentes banhos fosfatizantes, aplicados pelo processo industrial coil-coating utilizado pela TEKNO S.A. Este trabalho também traz contribuições referentes ao estudo da chapa revestida com Galvalumeâ que é um revestimento composto de uma liga constituída de 55% de alumínio, 43% de zinco e 2% de outros constituintes, entre eles o Silício. Com o estudo desse material pode-se comprovar e determinar qual revestimento com e/ou sem fosfatos tem maior resistência à corrosão. A análise metalográfica superficial das chapas e revestimentos foi realizada por Microscopia Óptica, Microscopia Eletrônica de Varredura e EDS. Ensaios normalizados de rugosidade e de dureza Vickers também foram realizados. A resistência à corrosão proporcionada pelos diferentes revestimentos de zinco e fosfatos foi avaliada por ensaios eletroquímicos como potencial vs tempo em circuito aberto e em corrente controlada, polarização potenciodinâmica, voltametria cíclica e espectroscopia de impedância eletroquímica em solução de cloreto de sódio 3,5% e pH ~ 8,1, equivalente à água marinha. Todo este trabalho teve como objetivo principal, comparar quanto à resistência a corrosão, três diferentes banhos fosfatizantes aplicados nas chapas zincadas, com o intuito de propor ajustes no processo vigente da TEKNO que forneceu todo suporte necessário para realização deste estudo.
In this work it was studied the electrochemical behavior and the microstructure characteristics of zinc coated steel plates with and without phosphate coatings originating from different baths applied for the coil-coating industrial process used by TEKNO S.A. This work also brings referring contributions to the study of Galvalumeâ coating, that is a coating composed of 55% of aluminum, 43% of zinc and 2% of other constituent league, among them the silicon. With this material study it was possible to estimate and determinate which coating has larger resistance to the corrosion. The surface metallographic analysis of all the coatings were accomplished by Optical Microscopy, Scanning Electron Microscopy and Energy Dispersive Spectrography techniques. Normalized methods of rugosity and hardness Vickers were also accomplished. The corrosion resistance for the different coatings was evaluated by electrochemical techniques as potential x time in open circuit , potenciodynamic polarization curves, cyclic voltammetric curves, galvanostatic curves and Electrochemical Impedance Spectroscopy in sodium chloride solution of 3,5% to the pH ~ 8,1 equivalent to the sea water. The main objective, in this work, was to compare the corrosion resistance of three different phosphates baths applied in the galvanized steel sheets, in order improve the effective process of TEKNO that supplied every necessary support for accomplishment of this study.
Aguiar, Fábio Eliseu Cardoso de. "Estudo eletroquímico da corrosão em chapas de aço galvanizado e fosfatizado por coil-coating /." Guaratinguetá : [s.n.], 2003. http://hdl.handle.net/11449/97123.
Повний текст джерелаBanca: Tomaz Manabu Hashimoto
Banca: Maria Auxiliadora Silva de Oliveira
Resumo: Neste trabalho estudou-se o comportamento eletroquímico e as características microestruturais de chapas de aço eletrozincado e zincado sem e com revestimentos de fosfatos, oriundos de diferentes banhos fosfatizantes, aplicados pelo processo industrial coil-coating utilizado pela TEKNO S.A. Este trabalho também traz contribuições referentes ao estudo da chapa revestida com Galvalumeâ que é um revestimento composto de uma liga constituída de 55% de alumínio, 43% de zinco e 2% de outros constituintes, entre eles o Silício. Com o estudo desse material pode-se comprovar e determinar qual revestimento com e/ou sem fosfatos tem maior resistência à corrosão. A análise metalográfica superficial das chapas e revestimentos foi realizada por Microscopia Óptica, Microscopia Eletrônica de Varredura e EDS. Ensaios normalizados de rugosidade e de dureza Vickers também foram realizados. A resistência à corrosão proporcionada pelos diferentes revestimentos de zinco e fosfatos foi avaliada por ensaios eletroquímicos como potencial vs tempo em circuito aberto e em corrente controlada, polarização potenciodinâmica, voltametria cíclica e espectroscopia de impedância eletroquímica em solução de cloreto de sódio 3,5% e pH ~ 8,1, equivalente à água marinha. Todo este trabalho teve como objetivo principal, comparar quanto à resistência a corrosão, três diferentes banhos fosfatizantes aplicados nas chapas zincadas, com o intuito de propor ajustes no processo vigente da TEKNO que forneceu todo suporte necessário para realização deste estudo.
Abstract: In this work it was studied the electrochemical behavior and the microstructure characteristics of zinc coated steel plates with and without phosphate coatings originating from different baths applied for the coil-coating industrial process used by TEKNO S.A. This work also brings referring contributions to the study of Galvalumeâ coating, that is a coating composed of 55% of aluminum, 43% of zinc and 2% of other constituent league, among them the silicon. With this material study it was possible to estimate and determinate which coating has larger resistance to the corrosion. The surface metallographic analysis of all the coatings were accomplished by Optical Microscopy, Scanning Electron Microscopy and Energy Dispersive Spectrography techniques. Normalized methods of rugosity and hardness Vickers were also accomplished. The corrosion resistance for the different coatings was evaluated by electrochemical techniques as potential x time in open circuit , potenciodynamic polarization curves, cyclic voltammetric curves, galvanostatic curves and Electrochemical Impedance Spectroscopy in sodium chloride solution of 3,5% to the pH ~ 8,1 equivalent to the sea water. The main objective, in this work, was to compare the corrosion resistance of three different phosphates baths applied in the galvanized steel sheets, in order improve the effective process of TEKNO that supplied every necessary support for accomplishment of this study.
Mestre
Fatome, Emilie. "Formulations de nanocomposites hautes performances pour revêtements coil-coating : optimisation des interactions nanocharges-matrice." Lyon, INSA, 2007. http://theses.insa-lyon.fr/publication/2007ISAL0027/these.pdf.
Повний текст джерелаThe objective of this work consists in optimizing formulations of coil-coating comprising nanofillers with the aim of improving the properties of coatings surface robustness without degrading other properties such as brightness or flexibility. We thus selected two families of nanofillers: lamellate clays and fumed silica for their mechanical performances and their economic attraction. We highlighted the importance of cation treatment and dispersion mode for lamellate clays dispersion improvment. However, a part of aggregates is broken, but without involving effects on the mechanical properties: nanofillers intrinsically harder should be used; it is the case of silicas. We then identified strong interactions between silica and melamine, leading to a strong gel. A surface treatment of adapted silica makes possible to reduce these interactions, which results in a quasi-Newtonian rheology due to a good dispersion of the fillers and significantly improved mechanical properties. To summarize, the interactions developed between nanofillers and organic matrix must be selected in an optimal way since they control not only the rheological behaviour of the formulations, but also the state of dispersion of the nanofillers in the cross linked film as well as various properties, in particular mechanical ones
Giannakopoulos, Ioannis. "The mechanical properties of polyester-based coil coatings : correlations with chemical structure." Thesis, Imperial College London, 2012. http://hdl.handle.net/10044/1/10011.
Повний текст джерелаWysoglad, Janek [Verfasser], and Jochen [Akademischer Betreuer] Gutmann. "Einflüsse der Schichtstrukturen von Coil-Coating-Beschichtungssystemen und deren Eigenschaftsprofile / Janek Wysoglad ; Betreuer: Jochen Gutmann." Duisburg, 2021. http://d-nb.info/1238016723/34.
Повний текст джерелаWerle, Ana Paula. "Vida útil de revestimento frio e autolimpante." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/3/3146/tde-02052016-163421/.
Повний текст джерелаConsidering aspects related to the indoor thermal comfort in buildings and reducing energy demand for cooling, the use of cool coatings (have high reflectance and emittance of solar radiation) can be a reasonable alternative to achieve these conditions. However, its durability is the critical path. This study aims to measure the durability of multifunctional coating that combines cool and self-cleaning properties. To attain this goal a single-layer cement coating was formulated, with and without pigment added, both with high initial reflectance and emissivity. To maintain these properties over time a coating of TiO2 in crystalline form of anatase was applied to the coating in two ways: in the first way, the particles were mixed to the cementitious layer, and in the second, they were applied superficially as a post-treatment layer. The exposure to UV radiation provides the photoactivation of anatase, activating the oxidation of organic matter and altering the contact angle between water and surface, facilitating the drag of dirt when wet making it self-cleaning. The performance of cool properties and the permanence of TiO2 particles on the surface were evaluated at 6 and 12 months of natural exposure in Ubatuba, Pirassununga and São Paulo. After aging the determinant influence of the sites\' exposure characteristics in the materials performances was observed. A small tendency of improved performance with TiO2 added to the cement layer was verified. In addition, it was noted that these coatings presented higher durability in comparison to the post-treatment layer due to the leaching process, which exposes encapsulated particles in the cementitious mix, providing longer interaction with UV radiation and the organic matter to be degraded. On the other hand leaching caused the partial removal of anatase in the post-treated surfaces. Despite better performance of the TiO2 added coating, the exposure time was insufficient to affirm this behavior because the results are too close to each other.
Niknafs, Ali. "Synthesis and characterisation of a novel hydroxylated polyester resin system for coil coatings." Thesis, University of Leeds, 2011. http://etheses.whiterose.ac.uk/6774/.
Повний текст джерелаJankus, Daniel James. "Antimicrobial Properties of Graphite and Coal-Derived Graphene Oxides as an Advanced Coating for Titanium Implants." Thesis, Virginia Tech, 2021. http://hdl.handle.net/10919/103151.
Повний текст джерелаMaster of Science
Any time a patient receives implantation surgery, there is a chance of microbes entering the body. These are typically naturally occurring skin flora, harmless but opportunistic. On the surface of implants within the body, these bacteria can form colonies called biofilms, leading to severe and potentially deadly infections, called prosthetic joint infection (PJI). PJI often requires multiple surgeries to remedy, but rates of reinfection are relatively high. As with any surgery, patients are given antibiotic drugs, but implants to not receive blood flow as the body normally would, reducing the effectiveness of antibiotics. Once biofilms are formed, the bacteria become even hardier and resistant even to powerful antibiotics. Graphene oxide (GO) is a carbon material known to have good biocompatibility (i.e., non-toxic) while providing antimicrobial properties. The focus of this study is on the development and characterization of a robust coating for titanium alloy implants to promote bone healing while reducing microbial biofilm colonization on the implant's surface. The novelty of this study is the use of proprietary coal-derived graphene oxide (c-GO) in a biomedical application. c-GO has been demonstrated to have a different chemical makeup than graphite-derived GO, which may improve its efficacy as an antimicrobial coating. As an alternative to powerful antimicrobial drugs, it was hypothesized that a coating of graphene-oxide would provide a defensive, passively antimicrobial layer to a titanium implant. While GO is typically quite expensive, the newly developed one-pot process provides an economical and environmentally friendly method of producing GO from coal (c-GO). The result is a coating that is inexpensive and capable of halving the biofilm formation of MRSA on titanium-alloy surgical screws in addition to providing improved bone cell adhesion and hard tissue compatibility.
Lewis, Oliver David. "A study of the influence of nanofiller additives on the performance of waterbourne primer coatings." Thesis, Loughborough University, 2008. https://dspace.lboro.ac.uk/2134/4646.
Повний текст джерелаJohansson, Katarina. "Fatty acid methyl esters as reactive diluents in solvent-borne thermally cured coil-coatings." Licentiate thesis, Stockholm, Chemical Science and Engineering, KTH, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4094.
Повний текст джерелаJohansson, Katarina. "Thermally cured coil-coatings utilizing novel resins and fatty acid methyl esters as reactive diluents." Doctoral thesis, KTH, Fiber- och polymerteknik, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4857.
Повний текст джерелаQC 20100817
Roy, Nirmita. "Electrical, Optical and Thermal Investigations of Cobalt Oxide-Antimony Doped Tin Oxide (CoO-ATO) Thin Films and Nanofiber Membranes." Scholar Commons, 2017. https://scholarcommons.usf.edu/etd/7441.
Повний текст джерелаDing, Haohao. "Tribologie du Ti-6AI-4V et d'un revêtement DLC en fretting : applications au contact tige/col dans les prothèses de hanches modulaires." Thesis, Lyon, 2018. http://www.theses.fr/2018LYSEC029/document.
Повний текст джерелаThe use of modular neck adapter when placing a total hip prosthesis introduces a new interface, between the femoral stem and the neck adapter, which is propitious to fretting damage during walking. Ti–6Al–4V alloy has been widely used in neck adapters and femoral stems. However, the Ti–6Al–4V / Ti–6Al–4V contacts present high friction and severe adhesive wear under fretting conditions. Diamond-like carbon (DLC) coatings have been widely used as protective coatings for metallic parts. Thus, they can be introduced into Ti–6Al–4V neck adapter / Ti–6Al–4V femoral stem contacts.The objective of this thesis is to investigate the tribological behaviors of DLC coating and Ti–6Al–4V alloy under fretting conditions for application to neck adapter / femoral stem contact. Fretting tests are conducted with a cylinder / flat contact under different values of displacement amplitude (±20 µm, ±40 µm, and ±70 µm) and normal force (between 200 N and 1 200 N). Furthermore, the effects of different DLC coatings (DLC A and DLC B), different surface roughness (smooth and rough), different coating positions (coating on the flat, on the cylinder, and on both surfaces), different environments (laboratory air and calf serum) are analyzed. Besides, the origin of low friction of Ti–6Al–4V / DLC coating contact is explored. The mechanical properties of tribofilm formed on the rubbed Ti–6Al–4V surface is studied.For fretting tests without coating (Ti–6Al–4V / Ti–6Al–4V contact) under laboratory air condition, the friction coefficient is high, between 0.8 and 1.2. The wear volume increases with the displacement amplitude. For fretting tests with coating, Ti–6Al–4V can be well protected under relatively low load conditions. The friction coefficient is low (around 0.2) and the wear volume is small. Under high load conditions, the coating is almost totally removed. The friction and wear volume are similar to tests without coating. The harder coating (DLC A) has better tribological property than DLC B. The coating on the smooth surface exhibits better fretting performance than on the rough surface. Coating on a cylindrical surface shows better tribological performance than on a flat surface. The DLC coating is damaged more severely when it slides against a DLC coating than against the uncoated Ti–6Al–4V alloy. The coating performs better under the serum condition than under the laboratory air condition. A tribofilm is formed on the rubbed Ti–6Al–4V surface when sliding against a DLC coating under low load conditions. The tribofilm shows higher hardness, higher Young’s modulus, higher compression modulus, higher yield strength than the Ti–6Al–4V alloy. A tribological model is proposed for tribofilm formation and explanation of origin of low friction, by in-depth analysis of contact surfaces, on mechanical and chemical points of view
Zhang, Wanrui. "Advanced spectroscopic studies into the degradation of polyester melamine coil coatings before and after exposure to natural and accelerated weathering tests." Thesis, Queen Mary, University of London, 2009. http://qmro.qmul.ac.uk/xmlui/handle/123456789/1751.
Повний текст джерелаSaglia, Pietro. "New frontiers and environmental sustainability of refrigeration systems." Doctoral thesis, Università degli studi di Padova, 2018. http://hdl.handle.net/11577/3426241.
Повний текст джерелаIl processo di asciugatura dei vestiti ha un elevato impatto nel consumo elettrico domestico. Di conseguenza, c'è un forte interesse nel miglioramento dell'efficienza energetica delle asciugatrici domestiche al fine di ridurre il loro consumo di energia. La tecnologia tradizionale di questi elettrodomestici utilizza resistenze elettriche per riscaldare l'aria prima dell'ingresso nel cesto. Da alcuni anni, i sistemi a pompa di calore sono stati identificati come la tecnologia più adatta per realizzare asciugatrici domestiche più efficienti. Nel caso di questo tipo di elettrodomestico, il miglioramento dell'efficienza del singolo componente, del singolo processo o del funzionamento generale ha un ruolo fondamentale. In particolare, lo studio si è focalizzato sullo scambio di massa all'evaporatore al fine di incrementare il tasso di condensazione, facilitando la rimozione dell'acqua dall'aria di processo. Le caratteristiche della superficie alettata dell'evaporatore influenzano lo scambio di calore, lo scambio di massa e le perdite di carico dell'aria. In un'asciugatrice, la scelta della superficie che consente di ottenere una più rapida deumidificazione è fondamentale. A questo scopo, un'indagine sperimentale è stato intrapreso al fine di valutare l'impatto di diversi rivestimenti superficiali sull'efficienza dell'evaporatore durante il processo di deumidificazione. Gli studi in letteratura inerenti all'impatto di trattamenti della superficie alettata nei processi di deumidificazione sono limitati. Inoltre, dati sperimentali in condizioni di elevata umidità assoluta non sono disponibili in letteratura. Una galleria aerodinamica è stata progettata e costruita all' ITC-CNR di Padova per le indagini sperimentali. I primi test sono stati effettuati per caratterizzare il comportamento dello scambiatore di calore in assenza di deumidificazione. Successivamente, sono state condotte prove in deumidificazione per confrontare i risultati sperimentali con un modello di deumidificazione. Buone previsioni sono state ottenute utilizzando un modello di differenza media efficace entalpica (LMED) per prove con umidità assoluta di ingresso fino a 30 gv/kga; per valori maggiori, la differenza relativa tra i risultati sperimentali e quelli del modello aumenta. Ciò è dovuto da un'invalidazione di un'ipotesi del modello che pone il fattore di Lewis pari a uno; per tali prove è stato calcolato un fattore di Lewis pari a 0.5. Perciò, è stato considerato un modello alternativo, basato su una modifica del precedente (m-LMED). Questo modello include il valore del fattore di Lewis nel calcolo del coefficiente di scambio termico totale. Per i test con umidità assoluta di ingresso maggiore di 30 gv/kga sono state trovate differenze relative inferiori al 10% tra i risultati sperimentali e quelli del modello m-LMED. La maggior parte dell'attività sperimentale ha interessato lo studio dell'impatto dei trattamenti della superficie alettata sull'efficienza dello scambiatore in deumidificazione. Le prove sperimentali sono state caratterizzate da elevati valori di umidità assoluta di ingresso, maggiori di 40 gv/kga. Tre campioni aventi caratteristiche diverse delle alette sono stati analizzati. Il primo è caratterizzato dalla superficie in alluminio non trattato, il secondo da un rivestimento idrofilico ed un terzo da uno idrofobico. Sono stati effettuati confronti in termini di potenza termica scambiata, di tasso di condensazione e di peso dell'acqua ritenuta. Le prove in deumidificazione sono state condotte in condizioni stazionarie a diverse portate volumetriche dell'aria. Il campione idrofobico ha evidenziato i più bassi valori di potenza termica scambiata e di tasso di condensazione, ma i più elevati valori di peso dell'acqua ritenuta. D'altra parte, il campione non trattato ed il campione idrofilico hanno manifestato valori simili in tutte e tre le categorie di confronto, non evidenziando particolari differenze nel loro funzionamento in deumidificazione.
Mende, Torsten. "Clinchen von beschichteten Feinblechen unter besonderer Berücksichtigung des Einsatzes von Wirkmedien." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2007. http://nbn-resolving.de/urn:nbn:de:swb:14-1168595350502-25793.
Повний текст джерелаMende, Torsten. "Clinchen von beschichteten Feinblechen unter besonderer Berücksichtigung des Einsatzes von Wirkmedien." Doctoral thesis, Technische Universität Dresden, 2006. https://tud.qucosa.de/id/qucosa%3A25003.
Повний текст джерелаWeijland, Elin, and Therese Rindberg. "Färgkomponenter som avgår vid bandlackering." Thesis, Linköping University, Department of Physics, Chemistry and Biology, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-20786.
Повний текст джерелаPå SSAB i Borlänge har man upptäckt att avgaser från färgen förorenar ugnarna vid härdning. Avgaserna består av lösningsmedel och andra flyktiga föreningar som sedan förkolnas och faller ner på lackerade plåtband. För att komma runt det här problemet har SSAB tillsammans med Akzo Nobel Industrial Finishes AB, i Gamleby, tillverkat en färg som inte ska ge ifrån sig något lösningsmedel och på så sätt minska bildandet av föroreningar i ugnarna. Färgen heter NOVA GreenCoat och innehåller rapsmetylester, RME, som är ett reaktivt lösningsmedel och ska binda till bindemedlet i färgen och på så sätt hindras från att avgå vid härdning.
Syftet har varit att undersöka om en viss metod fungerar bra för att samla upp avgaser vid härdning. Avgaserna analyserades med GC-MS och härdningen studerades med FTIR. Arbetet har utförts både i Borlänge och i Gamleby.
Metoden för uppsamling av avgaserna visade sig fungera, dock inte särskilt effektivt. Den skulle därför behöva optimeras.
Härdningen kunde till viss del följas med hjälp av FTIR. Förändring i IR-spektrumet syntes för hydroxyltoppen vid cirka 3500 cm-1. En skillnad kunde ses för en topp vid 2858 cm-1 som uppkom i det ohärdade materialet innehållande RME, men den försvann under härdning. Toppen ökade med ökad mängd RME och syntes inte alls för de prover som inte innehöll RME.
Samtliga gjorda analyser indikerade att RME avgick vid härdning. Vid analys med GC-MS kunde de föreningar som avgick från RME identifieras som: metyl-14-metyl pentadekanoat och/eller metyl hexadekanoat, olika former av metyl oktadekanoat samt olika former av metyl eikosanoat. Andra föreningar från klarlacken som avgick var lösningsmedel x och y samt i två av proverna hexametoximetylmelamin, HMMM.
Problems with exhaust gases from paint that contaminates the ovens have been discovered at SSAB in Borlänge. The exhaust gases contain solvents and other volatiles that vaporize from the paint and later on carbonize and fall down on the next coming sheets. SSAB and Akzo Nobel Industrial Finishes AB have developed a paint that is not supposed to vaporize any solvents and therefore reduce the contaminations of the ovens. The paint is called NOVA GreenCoat and contains rapeseed methyl ester, RME. RME is a reactive solvent that is supposed to react with the binder in the paint and therefore be prevented from leaving during thermal cure.
The purpose was to investigate whether a specific method worked well, for collecting the exhaust gases during thermal cure, or not. The collected exhaust gases were analyzed by using GC-MS and the cure was studied with FTIR. The work was executed both in Borlänge and Gamleby.
The method for collecting the exhaust gases worked, unfortunately it wasn’t particularly effective. It therefore needs to be optimized.
The cure could partially be studied by using FTIR. Changes in the IR-spectrum could be followed by looking at the hydroxyl peak at approximately 3500 cm-1. A certain difference was observed for a peak at 2858 cm-1 that appeared in the uncured material containing RME. The peak disappeared during cure. It increased with increased amount of RME and could not be observed at all for the samples that did not contain RME.
All the analyzed samples indicated that RME vaporize during cure. When analyzed with GC-MS the volatiles that vaporize from RME were identified as: hexadecanoic acid methyl ester and/or penta decanoic acid methyl-14-methyl ester, different forms of octadecanoic acid methyl ester and different forms of eicosanoic acid methyl ester. Other volatiles that vaporize from NOVA GreenCoat were solvent x and solvent y and for two of the samples hexa metoxy methyl melamine, HMMM, was also found.
Asmatulu, Ramazan. "Advanced Chemical-Mechanical Dewatering of Fine Particles." Diss., Virginia Tech, 2001. http://hdl.handle.net/10919/26604.
Повний текст джерелаPh. D.
LOC, NGUYEN HUU, and 阮有祿. "Improving Oven Temperature Control For Coil Coating Process." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/16480478636729285133.
Повний текст джерела國立高雄應用科技大學
精密模具與機械產研碩士外國專班
99
Coil coating process is a method in which an organic coating material is applied on rolled metal strip in a continuous process. The output of the coil coating industry is a coated metal strip. This has numerous applications in various industries such as outdoor or indoor material for building or home appliances like roof or furniture... The important part of this process is drying and curing the layers of wet organic paint, this is performed by curing ovens. There are some kinds of different curing methods, so that there are also some kinds of oven types. However, the most popular oven is type of convection oven which has advantages of curing complex surfaces and cheaper cost. In this study, typical convection oven for CCL (Coil Coating Line) is shown to express how to dry and cure wet paint layers. The oven includes an Incinerator which dissipates exhausted solvent out of oven into open air after deodorization with firing and heat recuperation to increase effectiveness of using energy.
Huang-KaiWang and 王煌凱. "The study of photoelectrochemical water splitting using n-GaN with NiOx & CoOx nanoparticles coating as the photoelectrodes." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/8fkhfq.
Повний текст джерела國立成功大學
光電科學與工程學系
107
Hydrogen generated by photoelectrochemical solar water splitting process has a great potential to provide the energy consumption. Gallium nitride (GaN) is the materials appropriate for solar water splitting system because its energy band position straddles the redox potential of water. However, n-type GaN (n-GaN) as photoanode has photo-corrosion event in the long-term experiment. In this research, we discuss the characteristics and photoelectrochemical (PEC) properties of Nickel Oxide (NiOx) and Cobalt Oxide (Co3O4) nanoparticles on n-GaN substrate by spin coating process. The various weight ratio of NiOx (1:5 and 3:2) and Co3O4 (1:1 and 1:5) were utilized in this study. These catalysts were covered on n-GaN to prevent photo-corrosion and decrease the solar water splitting reaction overpotential. Interestingly, NiOx nanoparticles can not only avoid the corrosion phenomenon on n-GaN surface, but also enhance photocurrent density while working electrode applied bias of 1V in two-electrode system. In stability test, the hydrogen evolution rate of NiO 3:2 was more rapid than the pristine n-GaN after 5 hours. This result indicates that NiOx nanoparticles covered on n-GaN can enhance lifetime and hydrogen production in PEC cells.
"An assessment of the Pietermaritzburg Waste Minimisation Club and the waste minimisation opportunities on a coil coating plant." Thesis, 2002. http://hdl.handle.net/10413/3266.
Повний текст джерелаThesis (M.Sc.)- University of Natal, Pietermaritzburg, 2002.
Dick and 謝孟峰. "Preparation and Characterization of Electrochemical Co3O4/CoO coating on stainless steel as Negative Electrodes for Thin-Film Lithium Ion Batteries." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/2a2952.
Повний текст джерела國立中興大學
材料工程學研究所
93
The electrolytic deposition of Co3O4 /CoO thin film on stainless steel was conducted in Co(NO3)2 aqueous solution to be used as a negative electrode in lithium ion thin film batteries. The cathode polarization curves includes 3 major electrochemical reactors: 1. O2 + 4H+ + 4e- → 2H2O (0 V ~ 0. 06V vs. Ag/AgCl ) 2. O2 + 2H2O+2e- → 4 OH- (0.06 V ~ -0.7 V vs. Ag/AgCl ) 3. 2H2O + 2e- → H2 + 2OH- (-0.7 V ~ -2.5 V vs. Ag/AgCl ) The coated specimen or the coating film carried out at 3rd step was subjected to annealing treatments and further characterized by XRD, TGA/DTA, SEM/EDS, AFM and RAMAN Spectroscopy. The as-coating film was Co(OH)2, condensed into CoO partially oxidized into Co3O4 at 200℃-400℃ with the particle size from 10 nm to 20nm, and obviously crystallized at 600℃-1000℃on the coated specimen. The Co3O4/CoO coated specimen annealed at 400℃ for 5hrs was further characterized by CV analysis and charged-discharged tests in LiPF6 and LiClO4 electrolytes respectively using Li metal as the reference and auxiliary electrode. During the first discharging, two electrochemical reactions occurred :The 1st , Co3O4+2Li++2e-→ 3Co+Li2O and the 2nd ,CoO+2Li++2e- → Co+ Li2O. However, only the reverse of the 2nd was found for the 1st charging. Also, the reversibility in LiPF6 was worse than that in LiClO4, since LiF was formed. The capacity of Co3O4/CoO coated specimen was still found 500 mAh/g after 50 charged-discharged cycles test in LiClO4 electrolyte
Rohr, Valentin. "Development of novel protective high temperature coatings on heat exchanger steels and their corrosion resistance in simulated coal firing environment." Phd thesis, 2005. http://oatao.univ-toulouse.fr/7419/1/rohr.pdf.
Повний текст джерела