Record Details     « New Search       Brief Record Full Record MARC Record     Bibliographic Data Control Number 278876 Date and Time of Latest Transaction 20180522074311.AM General Information 180522s |||||||||b ||00||| Cataloging Source STII-DOST Language Code eng Local Call Number Fil(S) TS1300 S42 v.7 2007 Main Entry - Personal Name Leaño, Jr., Julius L.0 Title Statement aExtraction and characterization of achuete (Bixa orellana) dye powder and its application to cotton and silk by Julius L. Leaño, Jr. Physical Description 9-17 graph,illus, pics, table 6 refs Summary, Etc.      Dyes from achuete seeds were extracted using ethanol at different liquor ratios (LR) and agitation time. The powders obtained were oven-dried at 60oC and were characterized using UV-Vis spectrophotometry and FT-IR spectroscopy. The Ámax of the aqueous alkaline dye solution is 451nm and is stable to prolonged heating. The FT-IR spectrum suggests the presence of bixin and norbixin pigments in the powder. Adsorption curves (isotherms) reveal rapid dye absorption during the first 30 minutes and slows down after 60 minutes for all the mordanted fabrics. Different concentrations of the aqueous alkaline dye powder solution were applied to alum and copper sulfate mordanted cotton and silk materials under varied dyeing time. Color yield was found dependent on the mordant used whereas the colorfastness (CF) to laundering was not affected by the dyeing time. CF to laundering rating is 3.5 for cotton and 4.0 for silk. (Author's abstract)04 Subject Added Entry - Topical Term Science and technology04   achuete04   FT-IR04   dyeing           Physical Location           Digital Copy Not Available          Add to Book Cart  |   Download MARC