Premium
Study on superabsorbent composite. XV. Effects of ion‐exchanged attapulgite on water absorbency of superabsorbent composites
Author(s) -
Zhang Junping,
Chen Hao,
Wang Aiqin
Publication year - 2007
Publication title -
polymer composites
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.577
H-Index - 82
eISSN - 1548-0569
pISSN - 0272-8397
DOI - 10.1002/pc.20384
Subject(s) - ammonium persulfate , distilled water , composite number , materials science , aqueous solution , superabsorbent polymer , composite material , acrylamide , ion exchange , polymerization , chemical engineering , ion , chemistry , copolymer , polymer , organic chemistry , chromatography , engineering
A series of superabsorbent composite, polyacrylamide/attapulgite, from acrylamide (AM) and ion‐exchanged attapulgite (APT) was prepared by aqueous polymerization, using N,N′ ‐methylenebisacrylamide (MBA) as a crosslinker and ammonium persulfate (APS) as an initiator. The effects of ion‐exchanged APT on water absorbency of superabsorbent composites in distilled water and in 0.9 wt% NaCl solution were studied. The result indicates that higher cation‐exchange capacity (CEC) and lower specific surface area (SSA) of APT treated with various anions are of benefit for improving water absorbency in distilled water. The effects of AlCl 3 solution concentration and Al 3+ ‐exchanged APT content on water absorbency of the composite were also investigated. The concentration of AlCl 3 solution has a great influence on water absorbency of the superabsorbent composite. Al 3+ ‐exchange of APT could also enhance reswelling ability of the corresponding composite, which indicates that Al 3+ ‐exchange of APT could improve gel strength and gives a direct evidence for its acting as an inorganic assistant crosslinker in the polymeric network. POLYM. COMPOS., 28:208–213, 2007. © 2007 Society of Plastics Engineers