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1.
Molecules ; 27(11)2022 May 25.
Artigo em Inglês | MEDLINE | ID: mdl-35684344

RESUMO

Fouling is the accumulation of unwanted substances, such as proteins, organisms, and inorganic molecules, on marine infrastructure such as pylons, boats, or pipes due to exposure to their environment. As fouling accumulates, it can have many adverse effects, including increasing drag, reducing the maximum speed of a ship and increasing fuel consumption, weakening supports on oil rigs and reducing the functionality of many sensors. In this review, the history and recent progress of techniques and strategies that are employed to inhibit fouling are highlighted, including traditional biocide antifouling systems, biomimicry, micro-texture and natural components systems, superhydrophobic, hydrophilic or amphiphilic systems, hybrid systems and active cleaning systems. This review highlights important considerations, such as accounting for the effects that antifouling strategies have on the sensing mechanism employed by the sensors. Additionally, due to the specialised requirements of many sensors, often a bespoke and tailored solution is preferential to general coatings or paints. A description of how both fouling and antifouling techniques affect maritime sensors, specifically acoustic sensors, is given.


Assuntos
Incrustação Biológica , Desinfetantes , Incrustação Biológica/prevenção & controle , Interações Hidrofóbicas e Hidrofílicas , Pintura , Navios
2.
Sci Rep ; 12(1): 10638, 2022 Jun 23.
Artigo em Inglês | MEDLINE | ID: mdl-35739140

RESUMO

Undertaking the conservation of artworks informed by the results of molecular analyses has gained growing importance over the last decades, and today it can take advantage of state-of-the-art analytical techniques, such as mass spectrometry-based proteomics. Protein-based binders are among the most common organic materials used in artworks, having been used in their production for centuries. However, the applications of proteomics to these materials are still limited. In this work, a palaeoproteomic workflow was successfully tested on paint reconstructions, and subsequently applied to micro-samples from a 15th-century panel painting, attributed to the workshop of Sandro Botticelli. This method allowed the confident identification of the protein-based binders and their biological origin, as well as the discrimination of the binder used in the ground and paint layers of the painting. These results show that the approach is accurate, highly sensitive, and broadly applicable in the cultural heritage field, due to the limited amount of starting material required. Accordingly, a set of guidelines are suggested, covering the main steps of the data analysis and interpretation of protein sequencing results, optimised for artworks.


Assuntos
Pinturas , Espectrometria de Massas , Pintura/análise , Pinturas/história , Proteínas , Proteômica
3.
Proc Natl Acad Sci U S A ; 119(22): e2202842119, 2022 May 31.
Artigo em Inglês | MEDLINE | ID: mdl-35613050

RESUMO

SignificanceThe neurotransmitter dopamine controls normal behavior and dopaminergic dysfunction is prevalent in multiple brain diseases. To reach a detailed understanding of how dopamine release and signaling are regulated at the subcellular level, we developed a near infrared fluorescent dopamine nanosensor 'paint' (AndromeDA) to directly image dopamine release and its spatiotemporal characteristics. With AndromeDA, we can ascribe discrete DA release events to defined axonal varicosities, directly assess the heterogeneity of DA release events across such release sites, and determine the molecular components of the DA release machinery. AndromeDA thus provides a new method for gaining fundamental insights into the core mechanisms of dopamine release, which with greatly benefit our knowledge of dopamine biology and pathobiology.


Assuntos
Axônios , Dopamina , Neurônios Dopaminérgicos , Nanoestruturas , Neurotransmissores , Imagem Óptica , Animais , Axônios/metabolismo , Encéfalo/metabolismo , Dopamina/análise , Dopamina/metabolismo , Neurônios Dopaminérgicos/metabolismo , Corantes Fluorescentes/química , Camundongos , Neurotransmissores/análise , Neurotransmissores/metabolismo , Imagem Óptica/métodos , Pintura , Espectroscopia de Luz Próxima ao Infravermelho/métodos
4.
Forensic Sci Int ; 336: 111327, 2022 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-35635980

RESUMO

There is a considerable interest in developing new analytical tools to fight the illicit trafficking of heritage goods and particularly of easel paintings, whose high market values attract an ever-increasing volume of criminal activities. The objective is to combat the illicit traffic of smuggled or forged paintworks and to prevent the acquisition of fakes or looted artefacts in public collections. Authentication can be addressed using various investigation techniques, such as absolute dating, materials characterization, alteration phenomena, etc.; for paintings this remains a challenging task due to the complexity of the materials (paint layers, ground, varnish, canvas, etc.) and preferable use of non-destructive methods. This paper outlines results from concerted action on detecting forged works of art within the framework of a Coordinated Research Project of the International Atomic Energy Agency (IAEA) called Enhancing Nuclear Analytical Techniques to Meet the Needs of Forensic Sciences1. One of the main objectives is to foster the use of emerging Nuclear Analytical Techniques (NAT) using particle accelerators for authentication of paintings, with potential application to other forensics domains, by highlighting their ability to determine painting authenticity and to track restorations or anachronistic clues. The various materials comprising a test painting were investigated using an array of NAT. Binder, canvas and support were directly dated by 14C using Accelerator Mass Spectrometry (14C-AMS); binder and pigments' molecular composition was determined using Secondary Ion Mass Spectrometry with MeV ions (MeV-SIMS); paint layer composition and stratigraphy were accurately determined using Ion Beam Analysis (IBA) and differential Particle-Induced X-ray Emission (PIXE); and pigment spatial distributions were mapped using full-field PIXE. High resolution Optical Photothermal Infrared Spectroscopy (O-PTIR) molecular imaging was also exploited. Obtained results are presented and discussed. It is shown that the combination of the above-mentioned techniques allowed reconstructing the history of the test painting.


Assuntos
Pinturas , Íons , Espectrometria de Massas , Pintura/análise , Raios X
5.
Spectrochim Acta A Mol Biomol Spectrosc ; 279: 121414, 2022 Oct 15.
Artigo em Inglês | MEDLINE | ID: mdl-35640470

RESUMO

Many issues in the conservation of paintings from the early modern period are still unresolved due to lack of information on paints from the late 19th and early 20th centuries, in particular their production, formulations, and later degradation processes. The inconsistency of the names that paint manufacturers chose for their products furthermore compounds the challenges faced by conservators and chemists wishing to study them. This paper addresses a number of these issues through investigations of commercial tube oil paints from a paint box owned by the Norwegian painter Harriet Backer (1845-1932). Samples were analyzed using a multi-instrumental approach. Micro-attenuated total reflection Fourier transform infrared spectroscopy and micro-Raman spectroscopy - supported by micro-X-ray powder diffraction - allowed the identification of binders, pigments, and extenders. The data highlight the use of materials that were new at the time and not reported in the manufacturer's catalog. Furthermore, zinc stearate has been detected for the first time. Its detection and the absence of any zinc-based pigments confirms that zinc stearate was already used as dispersing agent in paint formulations at that time.


Assuntos
Pintura , Pinturas , Pintura/história , Pinturas/história , Espectroscopia de Infravermelho com Transformada de Fourier , Análise Espectral Raman/métodos , Difração de Raios X
6.
J Environ Manage ; 317: 115369, 2022 Sep 01.
Artigo em Inglês | MEDLINE | ID: mdl-35623130

RESUMO

Volatile organic compounds (VOCs) diffused from paint sludge are potential hazard contributing significantly to environmental pollution and exposure to them can cause severe health issues. In this paper, a diffusion-controlled model was firstly developed for characterizing the emission behaviors of cumulative VOCs from automotive solvent-based paint sludge based on the worst field management scenario. The presented model is characterized by two key parameters: the diffusion coefficient (Dm) and the initial emittable concentration (Cm,0), which can be simultaneously obtained by our proposed ER-history method. Four major components were detected including 1-butanol, butyl acetate and 1,2,4-trimethylbenzene and 1-ethyl-4-methylbenzene. In addition, the model was validated by using environmental data in a ventilated test chamber, proving that the model is reliable and convincing. However, relative deviations of 1-butanol and butyl acetate are larger than those of 1,2,4-trimethylbenzene and 1-ethyl-4-methylbenzene, indicating that the model is more accurate for predicting hydrophobic VOCs release than those of hydrophilic VOCs. Besides, an increase in Cm,0 and Dm tends to enhance VOCs cumulation release. Our studies provide new insight into experimental designs for rapid model parameters measurement and a sound basis for estimating VOCs cumulative release from paint sludge as well as for hazardous waste.


Assuntos
Poluentes Atmosféricos , Compostos Orgânicos Voláteis , 1-Butanol , Poluentes Atmosféricos/análise , Monitoramento Ambiental/métodos , Pintura , Esgotos , Solventes , Compostos Orgânicos Voláteis/análise
7.
Magn Reson Imaging ; 91: 32-36, 2022 09.
Artigo em Inglês | MEDLINE | ID: mdl-35568272

RESUMO

OBJECTIVE: This study investigates the magnetic resonance (MR) features of high-pressure injection injuries (HPII) caused by grease and paints to detect the presence of foreign material and associated complications. METHODS: Sixteen rat models with HPII were established by injecting industrial grease and marine paints (n = 8 each) into their thighs. All the rats underwent a 3.0 T MR scanning, including T1-weighted imaging (T1WI), T2-weighted imaging (T2WI), Fat-suppressed T2-weighted imaging (FST2WI), Susceptibility-weighted imaging (SWI), and Diffusion-weighted imaging (DWI). Follow-up MR scanning was performed from 1st to 4th weeks. RESULTS: Acute subcutaneous grease and paints appeared as different signal intensity characteristics (grease: T1WI ↑, T2WI =, FST2WI ↓, SWI ↓, DWI ↓; paints: T1WI ↑, T2WI ↑, FST2WI ↑↓, SWI ↓, DWI ↓). As time progressed, the signal intensity of HPII lesions caused by both grease and paints became inhomogeneous. Impurity components of the foreign material appeared as marked low signal intensity on SWI. The signal intensity on DWI significantly increased subsequently due to purulent fluids (confirmed surgically). CONCLUSIONS: HPII caused by grease and paints have a characteristic appearance on MR imaging. SWI can detect impurity components of the foreign material, while DWI is highly sensitive to abscesses and helpful in monitoring infections.


Assuntos
Imagem de Difusão por Ressonância Magnética , Imageamento por Ressonância Magnética , Animais , Imagem de Difusão por Ressonância Magnética/métodos , Injeções , Imageamento por Ressonância Magnética/métodos , Espectroscopia de Ressonância Magnética , Pintura , Ratos
8.
Environ Res ; 212(Pt C): 113451, 2022 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-35537495

RESUMO

Treatment of paint manufacturing industry wastewater by electrooxidation (EO) process in which peroxymonosulfate (PMS) and transition metals are added was investigated. In the EO/PMS process, graphite was the cathode while different anode materials (Ti/IrO2, Ti/RuO2, and Ti/SnO2) were used. The anode with the highest chemical oxygen demand (COD) and true color removal efficiency was selected. To determine the catalyst effect on the process, different transition metals (Fe2+, Cu2+, Zn2+) were added and Fe2+ was chosen as the catalyst which provided higher removal efficiency and lower cost. The central composite design was applied for the optimization of the process variables of the EO/PMS/Fe2+ process. Current density, PMS dose, Fe2+ dose, and reaction time were process variables whereas COD and true color removal efficiency were system responses. Under optimum conditions (200 A/m2 current density, 14 mM PMS dose, 2.5 mM Fe2+ dose, 60 min reaction time), the estimated COD and true color removal efficiency by the model were 74.89% and 99.86%, respectively. The experimentally obtained COD and true color removal efficiencies as a result of validation studies were 74.28% and 99.03%, respectively. Quenching experiments showed that hydroxyl and sulfate radicals were both involved in the process.


Assuntos
Águas Residuárias , Poluentes Químicos da Água , Indústria Manufatureira , Oxirredução , Pintura , Peróxidos
9.
MedUNAB ; 25(1): 86-86, 202205.
Artigo em Espanhol | LILACS | ID: biblio-1372317

RESUMO

Con la técnica de aerografía sobre madera, se crea la obra "Daltonismo Racional", composición planteada en orden cartesiano, iniciando en el plano izquierdo superior con el panel rojo de línea totalmente quebrada, en constante zigzag, seguido a la derecha por el panel verde con gráfico de cigarrillo humeante; luego, en el sector izquierdo debajo del panel rojo encontramos el panel verde con la botella de licor y, finalmente, en la zona derecha inferior hallamos el panel con el gráfico del monitor rojo y línea blanca horizontal. Respecto a sus dimensiones, corresponde a un políptico conformado por cuatro módulos cuadrados, de 36 cm x 36 cm x 7 cm de profundidad. Entre los módulos hay un espacio de 20 cm, lo cual permite la formación de una cruz, por los dos espacios cruzados perpendicularmente. La obra tiene un carácter contestatario, frente a la manera como se pretende financiar la salud pública, debido a que los impuestos generados por la venta y consumo de alcohol y cigarrillos, se destinan para la salud, lo que nos lleva a una paradoja: ¿es razonable pensar que a través del detrimento de la salud de las personas que consumen licores y cigarrillos, se intente solucionar los problemas de salud?, ¿no es acaso la prevención y el no consumo de estas sustancias, lo que nos permite cultivar un mejor estado de salud?


With the technique of airbrushing on wood, the work "Rational Daltonism" is created. This is laid out in Cartesian order, starting on the upper left plane with the red panel with a totally broken line, in constant zigzag, followed to the right by the green panel with a graphic of a smoking cigarette; then, in the left sector below the red panel we find the green panel with the liquor bottle and, finally, in the lower right area we find the panel with the red monitor graphic and horizontal white line. Regarding its dimensions, it corresponds to a polyptych made up of four square modules, 36 cm x 36 cm x 7 cm deep. Between the modules there is a space of 20 cm, which allows the formation of a cross, by the two spaces crossed perpendicularly. The work has an anti-establishment character, as opposed to the way in which public health is intended to be financed, because the taxes generated by the sale and consumption of alcohol and cigarettes are destined for health, which leads us to a paradox: Is it reasonable to think that there is an attempt to solve health problems through the health detriment of the people who consume liquor and cigarettes? Is not prevention and not consuming these substances what allows us to cultivate a better health condition?


Com a técnica de aerografia sobre madeira, é criada a obra Daltonismo Racional. Esta está disposta em ordem cartesiana, iniciando no plano superior esquerdo com o painel vermelho com uma linha totalmente quebrada, em constante ziguezague, seguido à direita pelo painel verde com o gráfico de um cigarro fumando; em seguida, no setor esquerdo abaixo do painel vermelho encontramos o painel verde com a garrafa de licor e, finalmente, na área inferior direita encontramos o painel com o gráfico do monitor vermelho e linha branca horizontal. Quanto às suas dimensões, corresponde a um políptico composto por quatro módulos quadrados, com 36 cm x 36 cm x 7 cm de profundidade. Entre os módulos existe um espaço de 20 cm, que permite a formação de uma cruz, pelos dois espaços cruzados perpendicularmente. La obra tiene un carácter contestatario, frente a la manera como se pretende financiar la salud pública, debido a que los impuestos generados por la venta y consumo de alcohol y cigarrillos, se destinan para la salud, lo que nos lleva a una paradoja: es razonable pensar que a través del detrimento de la salud de las personas que consumen licores y cigarrillos, se intente solucionar los problemas de salud?, no es acaso la prevención y el no consumo de estas sustancias, lo que nos permite cultivar un mejor Estado de saúde?


Assuntos
Defeitos da Visão Cromática , Pintura , Arte , Consumo de Bebidas Alcoólicas , Uso de Tabaco
10.
Environ Res ; 212(Pt B): 113307, 2022 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-35447155

RESUMO

Pb isotope ratios are used for apportioning the sources of Pb in the blood of children (ages 1-6) screened for high blood Pb levels (>5 µg/dL) surrounding urban areas of Kansas City, MO. We compared Pb isotope ratios measured in the child's blood with those of the most likely sources of Pb in that child's home environment. The environmental sources sampled consisted of topsoils, paints, occupational sources (e.g., oil rig workers' uniforms, mechanics' clothes), indoor air filters, dusts, and dietary sources (e.g., spices). Blood lead levels (BLL) ranged from 2.9 to 12.7 µg/dL in children from the five homes participating in this study. Measurements of 206Pb/204Pb, 207Pb/204Pb and 208Pb/204Pb isotope ratios were made by multi-collector ICP-MS. Comparison of the Pb isotope ratios in home environment samples versus those in the child's blood in each home allowed the identification of possible sources of a child's Pb exposure in three homes. In five homes investigated, children's blood Pb levels were most likely to be derived from dusts inside, and topsoil outside, the homes, or a mixture thereof. In one case, blood Pb was derived from turmeric spice and, in another, the Pb was derived from paint. It is not always possible to directly link high BLLs to the environmental sources collected when Pb isotope ratios of the environmental samples did not overlap with those of the blood.


Assuntos
Poeira , Chumbo , Criança , Pré-Escolar , Cidades , Poeira/análise , Exposição Ambiental/análise , Humanos , Lactente , Isótopos/análise , Pintura
12.
Sci Total Environ ; 826: 154169, 2022 Jun 20.
Artigo em Inglês | MEDLINE | ID: mdl-35231519

RESUMO

Graffiti spray paints are commonly used in contemporaneous mural paintings in public spaces, contributing to the transformation of sites and urban life. These outdoor artworks are now beginning to show different deterioration forms, such as physical-mechanical alteration (loss of material and cohesion, etc.) and chromatic changes. However, the deterioration has not been formally characterized, and the influence of the paint composition and underlying substrate are not known. In this study, three non-metallic (red, blue and black) alkyd graffiti spray paints and one metallic (silver) polyethylene graffiti spray paint were applied to two granite stones with different mineralogy and texture and exposed to a natural urban-marine environment near Vigo (NW Spain) for one decade (2010-2020). Physical changes were evaluated by stereomicroscopy, colour spectrophotometry, measurements of gloss, surface roughness and static contact angle, and peeling test. Mineralogical changes were determined by x-ray diffraction and molecular changes by Fourier transform infrared spectroscopy. Moreover, micromorphological and chemical characterization of the surfaces was conducted by scanning electron microscopy. Physical-mechanical changes, such as craquelure and paint loss, depended on the texture of the granite. More specifically, paint on the granite with the finest grain size showed most intense cracking and loss of material. Chemical changes, which were not related to the granite substrate, were most intense in the red and silver paint coatings. In the red paint, loss of binder was accompanied by an intense fading of the colour (due to titanium dioxide relative enrichment), while in the silver paint coating, chemical changes occurred in both the organic binder and aluminium particles, thus darkening the colour. Fewer chemical changes were observed in the blue and black paints. Physical and chemical changes detected in these paints were not correlated.


Assuntos
Pinturas , Prata , Pintura , Dióxido de Silício
14.
Talanta ; 243: 123360, 2022 Jun 01.
Artigo em Inglês | MEDLINE | ID: mdl-35290939

RESUMO

A novel fast and automatic methodology for the hierarchical classification and similarity matching of mid-infrared spectra of paint samples based on the principles of Soft Independent Modelling of Class Analogy (SIMCA) and on the definition and properties of the Mahalanobis distance is here proposed. This approach was tested in a so-called market study (i.e., targeting products largely accessible to the general public and conceived for a considerably wide range of usages) conducted across the surroundings of the city of Lille, in France, and has permitted not only to successfully achieve the chemical characterisation of most of the analysed samples but also to discover specific commonality patterns among specimens sharing the same chemical features.


Assuntos
Pintura
15.
Sci Rep ; 12(1): 4055, 2022 03 08.
Artigo em Inglês | MEDLINE | ID: mdl-35260577

RESUMO

The cultural use of pigments in human societies is associated with ritual activities and the creation of social memory. Neolithic Çatalhöyük (Turkey, 7100-5950 cal BC) provides a unique case study for the exploration of links between pigments in burials, demographic data and colourants in contemporary architectural contexts. This study presents the first combined analysis of funerary and architectural evidence of pigment use in Neolithic Anatolia and discusses the possible social processes underlying the observed statistical patterns. Results reveal that pigments were either applied directly to the deceased or included in the grave as a burial association. The most commonly used pigment was red ochre. Cinnabar was mainly applied to males and blue/green pigment was associated with females. A correlation was found between the number of buried individuals and the number of painted layers in the buildings. Mortuary practices seem to have followed specific selection processes independent of sex and age-at-death of the deceased. This study offers new insights about the social factors involved in pigment use in this community, and contributes to the interpretation of funerary practices in Neolithic Anatolia. Specifically, it suggests that visual expression, ritual performance and symbolic associations were elements of shared long-term socio-cultural practices.


Assuntos
Sepultamento , Práticas Mortuárias , Arqueologia , Comportamento Ritualístico , Feminino , História Antiga , Humanos , Masculino , Pintura , Turquia
16.
Mar Pollut Bull ; 178: 113547, 2022 May.
Artigo em Inglês | MEDLINE | ID: mdl-35339866

RESUMO

Marinas have been shown to contribute elevated concentrations of copper (Cu) to marine waters. The Cu can come primarily from antifouling paints which are designed to discourage biofouling of boat hulls. Legislation in Washington State, USA is being developed to limit or regulate the amount and rate of diffusion of Cu from antifouling paints. This study provides baseline data for Cu in five marinas of different configuration and size within Puget Sound, a large fjord estuary. Samples were collected over a year from multiple environmental media. We find strong evidence that Cu accumulates inside marinas to higher concentrations than outside marinas. Marinas that are more enclosed accumulated higher concentrations of Cu than more open marinas. Using a power analysis, we assessed the adequacy of the baseline dataset to measure progress as a result of future legislation towards the reduction of Cu to Puget Sound from marinas.


Assuntos
Incrustação Biológica , Poluentes Químicos da Água , Incrustação Biológica/prevenção & controle , Cobre/análise , Estuários , Pintura , Poluentes Químicos da Água/análise
18.
Appl Spectrosc ; 76(5): 531-540, 2022 May.
Artigo em Inglês | MEDLINE | ID: mdl-35188427

RESUMO

Temperature measurement of internal components of a jet engine is a crucial control parameter to ensure its component life and efficiency. Particularly for thermal analysis of internal components of jet engines, irreversible thermochromic paints (TPs) have been developed at Rolls-Royce plc to evaluate the surface temperature of engine components where it is otherwise impossible. Thermochromic paints change color with respect to an increased temperature whereby the resulting change in the TP color corresponds to the maximum temperature experienced by the surface of engine components during testing. To improve the reliability and reproducibility of the temperature measurement by TPs, this work explored the potential use of diffuse reflection Fourier transform infrared spectroscopy (DRIFTS) combined with partial least squares regression (PLSR) analysis. The outcome of the prediction of the raw and pre-processed datasets was compared and discussed. The major contributors to the prediction models were the change in the property of the surface M-OH bonds, the structural change of the inorganic pigments and fillers, and their solid-state reaction at a higher temperature. The result showed improved reliability of the prediction model after the combined pre-process treatments with reported RMSEC of 4.5 °C and RMSECV of 13.0 °C using three latent variables.


Assuntos
Pintura , Análise de Fourier , Análise dos Mínimos Quadrados , Reprodutibilidade dos Testes , Espectroscopia de Infravermelho com Transformada de Fourier/métodos , Temperatura
19.
Luminescence ; 37(4): 524-542, 2022 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-35102701

RESUMO

The article briefly reports the fundamental scientific principles and landmarks in the field of luminescence and further enlightens the importance of persistent phosphor that is now widely used in luminous paints. Its main focus is on phosphorescence that makes use of lanthanides that have gained paramount importance in various cross-sections of luminescent applications. Both inorganic and organic afterglow materials, synthesis and characterization along with skilled researchers' essential updates on emerging trends and efforts are elucidated at length. It exclusively reviews the red/green/blue organic/inorganic/hybrid phosphorescent materials and the latest advances in the development of novel long afterglow materials that can accelerate the green technology in the world of luminescence.


Assuntos
Elementos da Série dos Lantanídeos , Substâncias Luminescentes , Luminescência , Pintura
20.
Sensors (Basel) ; 22(3)2022 Jan 21.
Artigo em Inglês | MEDLINE | ID: mdl-35161558

RESUMO

Strain measurements are vital for monitoring the load-bearing capacity and safety of structures. A common approach is to affix strain gages onto structural surfaces. On the other hand, most aerospace, automotive, civil, and mechanical structures are painted and coated, often with many layers, prior to their deployment. There is an opportunity to design smart and multifunctional paints that can be directly pre-applied onto structural surfaces to serve as a sensing layer among their other layers of functional paints. Therefore, the objective of this study was to design a strain-sensitive paint that can be used for structural monitoring. Carbon nanotubes (CNT) were dispersed in paint by high-speed shear mixing, while paint thinner was employed for adjusting the formulation's viscosity and nanomaterial concentration. The study started with the design and fabrication of the CNT-based paint. Then, the nanocomposite paint's electromechanical properties and its sensitivity to applied strains were characterized. Third, the nanocomposite paint was spray-coated onto patterned substrates to form "Sensing Meshes" for distributed strain monitoring. An electrical resistance tomography (ERT) measurement strategy and algorithm were utilized for reconstructing the conductivity distribution of the Sensing Meshes, where the magnitude of conductivity (or resistivity) corresponded to the magnitude of strain, while strain directionality was determined based on the strut direction in the mesh.


Assuntos
Nanocompostos , Nanotubos de Carbono , Condutividade Elétrica , Pintura , Próteses e Implantes
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