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Dissolution of condensed tannin with phenol: Optimum reaction parameters and some flow properties
Author(s) -
Samil A.,
Alma M. H.,
Acemioğlu B.
Publication year - 2005
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/app.22441
Subject(s) - acacia mearnsii , phenol , tannin , dissolution , chemistry , catalysis , condensed tannin , phenols , wattle (construction) , nuclear chemistry , proanthocyanidin , organic chemistry , materials science , polyphenol , antioxidant , botany , food science , composite material , biology
Condensed tannins from the bark of black wattle ( Acacia mearnsii L.) were solubilized with phenol using HCl as a catalyst. The optimum reaction parameters (temperature, time, and acid concentration) of the dissolution were determined. The results showed a clear effect on the percentage of reacted phenol and residue tannin by temperature, time and, particularly, acid concentration. It was found that almost 77% of the phenol used could be reacted with the tannin, and about 90% of the tannin could be solubilized into phenol in the presence of HCl (as a catalyst) having a concentration of 5%. The optimum temperature, time, and acid concentration were 160°C, 90 min, and 4%–5%, respectively. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 98: 2450–2453, 2005