Different types of dyes with chemical structure textile. The chemistry of reactive dyes and their application processes article pdf available in coloration technology 6 december 2014 with 8,191 reads how we measure reads. A free powerpoint ppt presentation displayed as a flash slide show on id. Fluorescence of 2n,ndimethylamino6propionylnaphthalene dyes badan and prodan is quenched by tryptophan in brij 58 micelles as well as in two cytochrome p450 proteins cyp102, cyp119 with badan covalently attached to a cysteine residue. Padma s vankar nature expresses itself in a wide spectrum of colours all around. Structure, preparation and chemistry of reactive dyes springerlink. Be careful to keep the dye powders and solutions off the desk tops. Structure, preparation and chemistry of reactive dyes. In the case of silk, the chemistry of silk parallels that of wool in some respects.
Every day materials we tend to use different kinds of materials like. Learn more about the properties, uses, and development of dyes in this article. Classification there are several ways for classification of dyes. Raja abstract dyes derived from natural materials such as plant leaves, roots, bark, insect secretions, and minerals were the only dyes available to mankind for the coloring of textiles until the discovery of the.
The dye molecule will be typically a monoazo structure containing additional groups such as hydroxyl, carboxyl or amino groups, which are capable of forming strong coordination complexes with transition metal ions. Fundamental processes of dye chemistry by hans eduard fierzdavid and louis blangey eidgenossische technische hochschule, zurich translated from the fifth austrian edition by paul w. Fading fading is caused by the chemical alteration of unstable dye. Contents title page introduction basis of colour natural dyes mauveine colour fastness dye classification azo dyes protein textile dyes cellulose textile dyes synthetic textile dyes fibrereactive dyes. Introduction the basis of this project is the chemistry behind fabric dyes what. However, reactive dye application is easier with wool. Chem of dyes ppt free download as powerpoint presentation. Fluorescence quenching of dimethylaminonaphthalene dyes. Ici launched a range of dyes based on this chemistry, called the procion dyes. Chemistry of dyes a dye is a colored substance that has an affinity to the substrate to which it is being applied. Contents title page introduction basis of colour natural dyes mauveine colour fastness dye classification azo dyes protein textile dyes cellulose textile dyes synthetic textile dyes fibrereactive dyes references. Dye a dye is a colored substance that has an affinity to the substrate to which it is being applied. The use of synthetic chemical dyes in various industrial processes, including paper and pulp manufacturing, plastics.
The chemistry of bonding of dyes to fibres is complex. These dyes attack the anionic sites present on the fabrics and get attached to them. The dye is generally applied in an aqueous solution, and requires a mordant to improve the fastness of the dye on the fiber. The book identifies plants with high dye content that are viable for. Chemistry of dyes 61 natural form or synthesized inside the polymer matrix as a waterinsoluble dye.
A dye is a colored compound, normally used in solution, which is capable of being fixed to a fabric. These are azo dyes and are characterized by the presence of acidic groups. These dyes contain organic basic groups such as nh2 or nr2. Chemistry investigatory project class 12 slideshare. The chemistry of reactive dyes and their application processes. The chemistry behind how they change the colour of hair can actually get pretty complicated, but this graphic tries to boil it down to the key classes of chemicals involved, and an overview of the process that produces the dye molecules. View and download powerpoint presentations on dyes ppt. Dyes are usually soluble in water whereas pigments are insoluble. Free chemistry powerpoint templates are made, while keeping in mind students who are required to give clear. Chemistry of inks, dyes and pigments article written and posted by. Pro chemical and dye has been a supplier of versatile fiber art supplies including. A dye is a coloured compound,normally used in solution,which is capable of being fixed to a fabric.
The dye is generally applied in an aqueous solution, and may require a mordant to improve the fastness of the dye on the fiber. Acid dyes, azoic dyes, basic dyes, direct dyes, cationic dyes, disperse dyes, neutral dyes, pigments, reactive dyes, solvent dyes and so on. Mar 07, 2017 acid dyes are typically soluble in water and possesses affinity for amphoteric fibers while lacking direct dyes affinity for cellulose fibers. Download the best free powerpoint templates to create modern presentations. Scribd is the worlds largest social reading and publishing site. Perkin transactions of the royal society of chemistry uk major journal reporting organic. Consequently, the dyes become chemically part of the fiber. Please practice handwashing and social distancing, and check out our resources for adapting to these times. Chemical bonding thus plays an important role in how and why dyes work. Dye, substance used to impart color to textiles, paper, leather, and other materials such that the coloring is not readily altered by washing, heat, light, or other factors to which the material is likely to be exposed. The idea is that placing a waterinsoluble dye within the polymer matrix would prevent colour removal upon exposure of the substrate to water. After protonating a part of the molecule, irradiation with uv light see photochromism, or introducing other kind of such change, the bond between the spiro carbon and the oxazine interrupts, the ring opens, the. Disadvantages for the biochemist resulting from dependence upon dyes marketed purely for the textile industry are mentioned. High quality dyes fiberactive dyes actually chemically covalent bond to the molecules of the fabric and can never be washed out.
Vittum eastman kodak company, rochester, new york published and distributed in the public interest with the consent of the attorneygeneral under license no. Handbook of natural colorantsthomas bechtold, rita mussak. Pdf classifications, properties and applications of. These are used to dye modified nylons, polyester, wool.
Ppt dyes in chemistry powerpoint presentation free to. Formation of nonemissive complexes between a dye molecule and tryptophan accounts for about 76% of the fluorescence intensity quenching in micelles, the. Unlike most organic compounds, dyes possess colour because they 1 absorb light in the visible spectrum 400700 nm, 2 have at least one chromophore. The chemistry of permanent hair dyes compound interest.
These dyes are made from synthetic resources such as. Nov 4, 20 explain how chemical reactions occur and ace that science presentation through free chemistry ppt background for use in educational and professional settings stay safe and healthy. Hair and food dyes hair dyeing is achieved with a synthetic dye applied with hydrogen peroxide that first bleaches the natural pigment melanin. Both dyes and pigments are colored, because they absorb only some wavelengths of visible light. Prior to then, attempts to react the dye and fibers involved harsh conditions that often resulted in degradation of the textile. Wikipedias story and this was the beginning of the chemical industry. Some dyes only stain the cloth, and wash out a little each time the cloth is laundered. Colorants impart color pigments insoluble colorants usually inorganic. You can use these chemistry ppt in your projects and presentations. Today, hair dyes are widely used, either to cover up grey hairs, or simply by those wanting to change their natural hair colour. Dyes alfa chemistry dyes are colored organic compounds that can dye fibers or other substrates to a certain color. Metal complex dye an overview sciencedirect topics.
Different types of dyes with chemical structure textile learner. Be sure to view the studio safety guidelines before using our products. Multi choice questions and their answers in color, dyes and. Dyes are colored organic compounds that are used to impart color to various substrates, including paper, leather, fur, hair, drugs, cosmetics, waxes, greases, plastics and textile materials. Ppt the chemistry of tie dye powerpoint presentation. The dye is generally applied in an aqueous solution, and require.
Thousands of ppt templates easy to edit with highquality slides, created by top designers around the world. The chemistry and manufacture of vat dyes by robert j. Download free chemistry powerpoint templates and themes. It involves direct bonding, hbonds and hydrophobic interac tions. General introduction to the chemistry of dyes some. Unlike most organic compounds, dyes possess colour because they 1 absorb light in the visible spectrum. Chapter 1 introduction reactive dyes definition fiber reactive dyes are colored organic compounds that are capable of forming a covalent bond between reactive groups of the dye molecule and nucleophilic groups on the polymer chains within the fiber 14. Chemistry and industry ii basic dyes these dyes contain basic groups like nh 2 group or nr 2 group therefore these are called basic dyes.
Different types of dyes with chemical structure different types of dyes with chemical structure. Chemistry of natural dyes indian academy of sciences. The dye molecules carry a chromophore, which absorb varying spectrums of light, allowing only certain spectrums to. March 15, 2009 i introduction vat dyes, which include indigo and anthraquinonebased dyes, are chemically complex dyes which are insoluble in water.
Dyeing is normally done in a special solution containing dyes and particular chemical material. Interestingly there has been a flow of activity in the recent past relating to the use of. The chemistry of tie dye project day thursday, october 19th a free powerpoint ppt presentation displayed as a flash slide show on id. The chemical structures of six common fabricswool, acrylic, polyester, nylon, cotton. Reactive dyes introduction to reactive dyes although. Each free presentation is unique, which is why there are so many uniquely designed presentation templates to express each persons creativity and style. Sources, chemistry and applications is an indepth guide to natural dyes, offering complete and practical coverage of the whole dyeing process from source selection to posttreatments.
Natural dyes from plants, animal less often and mineral resources, has long been used for dyeing of textile, leather, body, hair, for cosmetic purposes and craft as. Facets of the basic chemistry of the various types of reactive dyes relevant to their use in dye affinity chromatography are discussed and the wide variety of chromogens used in reactive dyes are. American chemical society ncw 2015 chemistry colors our world exploring the chemistry of dyes, pigments, and light your name your affiliation location or type. Dyes and pigments covers the scientific and technical aspects of the chemistry and physics of dyes, pigments and their intermediates. Ppt dyes in chemistry powerpoint presentation, free. Congo red, the first direct dye, was discovered in 1883 by paul bottinger, who was working as a dye chemist for the friedrich bayer company in ebersfeld, germany garg and nigam, 1981. Chemical structure ideal properties of dyes lightfast resist fading. Metalcomplex dyes also called premetallised dyes may be broadly divided into two classes. Whether it is an organic or inorganic reaction, it can be explained with free chemistry ppt backgrounds.
Sources, chemistry, application and sustainability issues sujata saxena and a. The dye must be fastor chemically stable so that the colour will not wash with soap and water, fade on exposure to sunlight etc. These are used to dye modified nylons, polyester, wool, cotton, leather, paper, etc. These are also azo dyes and are used to dye the fabrics directly by placing in aqueous solution of the dye. Lewis of the university of leeds and aatcc 2008 olney award winner shares his views on the developments in the field of textile chemistry and color with respect to reactive dyes, dyeing. Most dye materials are irritants to the skin, eyes, and respiratory system and may be toxic by inhalation and ingestion. Emphasis is placed on the properties of the colouring matters themselves rather than on their applications or the system in which they may be applied. It is an ionizing and aromatic organic compound, with chromophores as a major component. They must first be reduced to the leuco form in an. Ppt synthetic dyes powerpoint presentation, free download id. The dyes used in this experiment should be handled with the utmost care since they will dye the skin and clothing. Textile fibers, dyes, finishes, and processes a concise guide by howard l. It also outlines the latest developments in the area of functional dyes.
Find powerpoint presentations and slides using the power of, find free presentations research about dyes ppt. Golam mawla daffodil international university dept. While some dyes can react chemically with the substrates forming strong bonds in the process, others can be held by physical forces. General i article chemistry of natural dyes padma s vankar is at the facility for ecological and analytical testing in lit, kanpur. Each class of dye has a very unique chemistry, structure and particular way of bonding. Dyeing is the application of dyes or pigments on textile materials such as fibers, yarns, and fabrics with the goal of achieving color with desired color fastness.
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