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Dyeability of cellulose fibers using dyestuff from African rosewood ( Pterocarpus erinaceous )
Author(s) -
Popoola A. V.
Publication year - 2000
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/(sici)1097-4628(20000725)77:4<746::aid-app5>3.0.co;2-4
Subject(s) - absorbance , solvent , dyeing , chemistry , cellulose , polymer chemistry , methanol , amine gas treating , nuclear chemistry , materials science , chromatography , organic chemistry
Methanol extracted from the “heart wood” of the plant Pterocarpus erinaceous (African rosewood) gave a brick red dyestuff. Chromatographic separation of the dye produced a single homogenous component with an Rf value of 0.78, a yield of about 17.3% and a melting point of 86°C. IR spectrum of the purified dye showed the presence of an aromatic CC double bond band at 1620–1470 cm −1 and NH 2 absorption characteristic of an aromatic amine NH stretch at 3590–3400 cm −1 , while para‐disubstitution on aromatic nucleus was observed at 850–840 cm −1 . A wavelength of maximum absorbance, λ max , of 500 nm was recorded on a UV/visible scan for the solvent soluble dye. The dye, which was substantive to cotton, was applied quantitatively to it and reed fibers by exhaust dyeing technique from locally distilled alcohol. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 77: 746–751, 2000