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Immobilization of cationic polyelectrolyte on polystyrene spheres and adsorption for model whitewater contaminants
Author(s) -
Xiao He,
He Beihai,
Li Junrong
Publication year - 2015
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.42509
Subject(s) - cationic polymerization , polyelectrolyte , adsorption , polymer chemistry , chemical engineering , polystyrene , chemistry , ammonium chloride , chain transfer , polymerization , langmuir , chloroacetyl chloride , freundlich equation , materials science , chloride , organic chemistry , radical polymerization , polymer , engineering
Polystyrene (PS) spheres with cationic polyelectrolyte brushes were prepared by reversible addition‐fragmentation chain transfer polymerization (RAFT) from cross‐linked PS spheres. These PS spheres were subsequently modified by reaction with chloroacetyl chloride and S,S‐Bis(α,α’‐dimethyl‐α”‐acetic acid) trithiocarbonate to serve as macro chain transfer agents (macro‐CTAs). Methacryloxyethyltrimethyl ammonium chloride (MAC) was then grafted from these macro‐CTAs of PS spheres to obtain cationic PS spheres. FT‐IR, 13 C‐NMR, SEM, element analysis, and TGA techniques were applied to investigate and optimize the structure of PS spheres. The cationic PS spheres loading 1.35 mmol/g poly‐MAC were used as absorbents for removal of polygalacturonic acid (PGA) and sodium ligninsulfonate (lignin‐Na). Adsorption capacity of cationic PS spheres could reach 3 mg PGA/g and 24 mg lignin‐Na/g, respectively. Moreover, adsorption isotherm data of PGA were described by Langmuir‐Freundlich model, whereas lignin‐Na conformed to Langmuir model. Kinetic studies suggested that dissolved substances (PGA and lignin‐Na) could diffuse into the pores of cationic PS spheres. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 42509.