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Surface chemical modification of polypropylene fiber waste by H 2 SO 4 : Mechanistic investigation and application as cation‐exchange adsorbent
Author(s) -
Matos Jamerson Peixoto,
Sansiviero Maria Terezinha Caruzo,
Lago Rochel Montero
Publication year - 2009
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.30633
Subject(s) - adsorption , polypropylene , sulfuric acid , cationic polymerization , ion exchange , sulfonic acid , methylene blue , fiber , materials science , polymer chemistry , chemical engineering , molecule , nuclear chemistry , chemistry , inorganic chemistry , organic chemistry , composite material , catalysis , ion , photocatalysis , engineering
In this work, polypropylene (PP) fiber waste was modified by the reaction with concentrated H 2 SO 4 . IR, TG, Raman, CHN, acid titration, SEM, and XRD suggested that sulfuric acid at about 105°C reacts with PP to produce mainly surface sulfonic groups. The kinetic experiments showed that these SO 3 H groups decompose to form SO 2 gas leading to an aromatization of the polymer to form amorphous and graphitic carbon. Adsorption isotherms of the cationic model molecule methylene blue showed that the modified PP fibers have a great potential as ion‐exchange adsorbent. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2010