Dyeing

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  • Nearly all textile materials are colored after fabrication and before final finishing. The coloration of fibers and fabrics through dyeing is an integral part of textile manufacturing. This book discusses in detail several emerging topics on textile dyeing. The pretreatment of textiles prior to dyeing is addressed by several authors. Menezes and Choudhari present chemical alternatives to traditional pretreatment, while Tavcer discusses enzyme pretreatment procedures.

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  • Basic blue 41 is a very stable dye using in wool weaving industry. Fenton reaction is often used to decompose stable substances in wastewater. In this study planed experiments method was used to investigate the effect of three factors, that are pH, H2O2 and Fe2+ concentration on COD reduction. The response surface was determined by program Modde 5.0, the optimal reaction conditions was: Fe2+ concentration is 120 mg/L, H2O2 concentration is 10 mM, pH is 4.

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  • Over the decades there have been several papers on the coloration of cotton-based textiles. The number of articles dealing with the processing of cotton, including preparation, dyeing, and finishing, may be in the thousands. An investigation of the possible causes of problems occurring in the coloration of textiles revealed that a comprehensive review of case studies and scientific analysis would be a welcome addition to the already rich pool of knowledge in this area.

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  • The dye-decolorizing peroxidase (DyP)-type peroxidase family is a unique heme peroxidase family. The primary and tertiary structures of this family are obviously different from those of other heme peroxidases. However, the details of the structure–function relationships of this family remain poorly understood.

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  • Isotherms, thermodynamics and kinetics of rhodamine B dye adsorption on natural diatomite. In this paper, Phu Yen diatomite was used as adsorbent for adsorption rhodamine B (RB) dye in aqueous solution. Analysis methods, including SEM, XRD, FT -IR, and N2 adsorption-desorption isotherms, were used to characterise the adsorbent.

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  • Nanosilica was synthesized via the hydrothermal technique, followed by the vacuum frying system at low temperature and pressure. Then, the achieved nanoparticles were used for removing of Crystal Violet dye (CV) from wastewater. The absorbent and absorption process were studied by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), Field Emission Scanning Electron Microscope (FE-SEM), X-ray Fluorescence (XRF).

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  • This study investigated the Photo-Fenton process in textile wastewater treatment by using textile synthesis wastewater made of Symafix Red Dye solution. The aim of the study was to investegate the factors that influent to the photo-Fenton process such as contact time, pH, H2O2 and Fe2+conectrations, and UVexposure in order to research the optimum values of this process.Treatment of textile wastewater was carried out at ambient temperature in a batch reactor.

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  • This paper presents the connection among three factors of the eco–friendly approach and products: natural textile materials, natural dyes and utilization of waste. The silk and wool materials were chosen as they are both protein fibers that have natural dyes affinity.

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  • In this paper we present the experimental setup of the Hanbury Brown - Twiss interferometer and the measurement results of the antibunching effect from single Rhodamine B dye molecules and single CdTe quantum dots in dilute solution. By fitting the second order correlation data, we derive a fluorescence lifetime of approximately 2 ns for Rhodamine B and 45 ns for CdTe quantum dots. Our results demonstrate an alternative way for determining the fluorescence lifetime using the antibunching effect.

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  • The electrodes after being sensitized with dye “N179” were combined with Pt counter electrodes and iodine-based electrolyte to make DSSC cells. I-V characteristics of the DSSC cells were recorded at room temperature. The open-circuit voltage (Voc), the short-current density (Jsc) and the photoelectric conversion efficiency η) of the DSSC cells were estimated. The results show that the graphene content added into TiO2 electrode films has affected on Voc, Jsc and η of cells in the nonlinear form. The efficiency reached a maximal value with a graphene concentration of 0.005 wt %.

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  • This study aims to synthesize the Cu+/bipyridyl-based complex using Sonogashira cross coupling. The structure of the ligand and the complex were investigated by nuclear magnetic resonance spectroscopy; by single crystal X-ray diffraction and by UV-VIS absorption spectroscopy. The obtained experimental results were in good agreement with the theoretical calculations. The complex is a potential candidate to be the photo sensitizer in dye-sensitized solar cells.

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  • The fluorescence enhancement or quenching is attributed to the increase or decrease of radiative recombination rates, respectively. The parameters of the energy transfer between fluorescent nanoparticles (dye molecules encapsulated in silica nanoparticles) and nano golds have been estimated. The results show that the interactions between nanoparticles depend on the size of both fluorophores (as donors) and gold nanoparticles (as acceptors).

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  • Most solar modules used in photovoltaics are currently produced from crystalline and polycrystalline silicon wafers, the representatives of so-called first generation of solar cells. This type of devices are among the most efficient but at the same time the most expensive since they require the highest purity silicon and involve a lot of stages of complicated processes in their manufacture.

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  • SOLAR CELLS – DYE-SENSITIZED DEVICES Edited by Leonid A. Kosyachenko .Solar Cells – Dye-Sensitized Devices Edited by Leonid A. Kosyachenko Most solar modules used in photovoltaics are currently produced from crystalline and polycrystalline silicon wafers, the representatives of so-called first generation of solar cells. This type of devices are among the most efficient but at the same time the most expensive since they require the highest purity silicon and involve a lot of stages of complicated processes in their manufacture.

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  • Photovoltaics have started replacing fossil fuels as major energy generation roadmaps, targeting higher efficiencies and/or lower costs are aggressively pursued to bring PV to cost parity with grid electricity. Third generation PV technologies may overcome the fundamental limitations of photon to electron conversion in single-junction devices and, thus, improve both their efficiency and cost. This book presents notable advances in these technologies, namely organic cells and nanostructures, dye-sensitized cells and multijunction III/V cells. ...

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  • Textile industry is a leading industry for most countries, such as China, Singapore, UK, Bangladesh, Italy, Turkey etc. But, environmental pollution is one of the main results of this industry. Parralel to usage of huge amounts of water ad chemicals, the textile dyeing and finishing industry is one of the major polluters among industrial sectors, in the scope of volume and the chemical composition of the discharged effluent (Pagga & Brown, 1986).

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  • Wet processing of textiles uses large quantities of water, and electrical and thermal energy. Most of these processes involve the use of chemicals as assisting, accelerating or retarding their rates and are carried out at elevated temperatures to transfer mass from processing liquid medium across the surface of textile material in a reasonable time. So, we can use some natural materials and some physical tools to reduce the chemicals, water, energy and pollution.

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  • Tham khảo tài liệu 'solar cells dye sensitized devices part 1', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả

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  • Tuyển tập các báo cáo nghiên cứu khoa học ngành toán học được đăng trên tạp chí toán học quốc tế đề tài: Increases in solar conversion efficiencies of the ZrO2 nanofiber-doped TiO2 photoelectrode for dye-sensitized solar cells

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  • Human genetics is the medical field with the most rapid progress. This book aims to provide an overview on some of the latest developments in several genetic diseases. It contains 14 chapters focused on various genetic disorders addressing epidemiology, etiology, molecular basis and novel treatment options for these diseases. The chapters were written by 41 collaborators, from 8 different countries in Europe, Asia, and America, with great expertise in their field. Chapters are heterogeneous, offering a welcomed personalized view on each particular subject....

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