Premium
Preparation and properties of diatomite composite superabsorbent
Author(s) -
Qi Xiaohua,
Liu Mingzhu,
Chen Zhenbin,
Liang Rui
Publication year - 2007
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.847
Subject(s) - acrylic acid , ascorbic acid , swelling , composite number , materials science , superabsorbent polymer , acrylate , hydrogen peroxide , monomer , redox , polymerization , salt (chemistry) , butyl acrylate , chemical engineering , polymer chemistry , sodium , swelling capacity , nuclear chemistry , composite material , chemistry , organic chemistry , polymer , food science , engineering , metallurgy
A novel diatomite composite superabsorbent was synthesized by solution polymerization of partially neutralized acrylic acid and diatomite, using N,N′‐methylenebisacrylamide as a crosslinking agent and hydrogen peroxide and L ‐ascorbic acid as a redox initial system. The influences of some reaction conditions, such as diatomite content, neutralization degree of acrylic acid, amount of initiator, amount of crosslinking agent, monomer concentration, and the reaction temperature on swelling characteristic were investigated. The water absorbency of the sample prepared at optimum conditions was 99 g/g in 0.9 wt% NaCl solution. The results of swelling rate measurement showed that diatomite composite superabsorbent had better swelling rate than that of poly(sodium acrylate) prepared in the same conditions. Other properties, i.e. water retention, reswelling ability and resistance to salt, were also examined. Copyright © 2007 John Wiley & Sons, Ltd.