EXTRACTION, CHARACTERIZATION AND APPLICATION OF SELECTED NATURAL DYES AND MORDANTS ON LEATHER.

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dc.contributor.authorOGBOSO, OKWUCHI
dc.date.accessioned2014-03-13T08:26:43Z
dc.date.available2014-03-13T08:26:43Z
dc.date.issued2006-10
dc.descriptionA THESIS SUBMITTED TO THE POSTGRADUATE SCHOOL IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE AWARD OF THE DEGREE OF MASTER OF SCIENCE (M.Sc.) IN TEXTILE SCIENCE AND TECHNOLOGY DEPARTMENT OF TEXTILE SCIENCE AND TECHNOLOGY FALCULTY OF SCIENCE AHMADU BELLO UNIVERSITY ZARIA NIGERIA. OCTOBER, 2006en_US
dc.description.abstractExtracts were obtained from Savanna mahogany (Khaya senegalensis), Annatto (Bixa Orellea), Red Onion (Alluim cepa), Mango (Mangnifera indica), and Zobo (Hibiscus sabdariffa) in various solvents ranging from acetone, ethanol, methanol, water and chloroform. The results obtained showed that the extracts were found to possess different colour impacting chromophores and could be used for leather application. The shades of the colours can also be varied using plant mordants such as plantain and citrus peels. The extracts are toxic free as none had LD50 less or equal to 2 mg/kg. The least of the results obtained is that of zobo (Hibiscus sabdariffa) which showed LD50 of 177.5mg/kg. The extracts could also be used in food and beverage industries. Most of the extracts showed clear zones of inhibition of microbial activities which is a clear indication that they could conveniently be used in an environment infested by such microbes. Rub fastness, tensile strength, and percentage dye adsorption examination showed that the extracts of different solvents using plant mordants were good. The IR – spectra of the extracts confirmed the presence of colour imparting chromophores which are responsible for the individual colours of the extracts.en_US
dc.identifier.urihttp://hdl.handle.net/123456789/3865
dc.language.isoenen_US
dc.subjectEXTRACTIONen_US
dc.subjectCHARACTERIZATIONen_US
dc.subjectAPPLICATIONen_US
dc.subjectNATURAL DYESen_US
dc.subjectMORDANTSen_US
dc.subjectLEATHERen_US
dc.titleEXTRACTION, CHARACTERIZATION AND APPLICATION OF SELECTED NATURAL DYES AND MORDANTS ON LEATHER.en_US
dc.typeThesisen_US
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