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Study on superabsorbent composite XXV. Synthesis, characterization, and swelling behaviors of poly(acrylic acid-co-N-acryloylmorpholine)/attapulgite superabsorbent composites

✍ Scribed by Junping Zhang; Yin Liu; Aiqin Wang

Publisher
Society for Plastic Engineers
Year
2009
Tongue
English
Weight
449 KB
Volume
31
Category
Article
ISSN
0272-8397

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✦ Synopsis

Abstract

In this work, a novel poly(acrylic acid‐co‐N‐acryloylmorpholine)/attapulgite superabsorbent composite was prepared by graft copolymerization among acrylic acid, N‐acryloylmorpholine and attapulgite in aqueous solution, using N,N′‐methylenebisacrylamide as a crosslinker and ammonium persulfate as an initiator. The result from FTIR spectra showed that OH of attapulgite participated in graft copolymerization with acrylic acid and N‐acryloylmorpholine. Proper monomer ratio and atapulgite content could form a loose surface, and improve reswelling ability and initial swelling rate. The buffer action of the COOH and COO^−^ groups in the superabsorbent composite keeps the water absorbency a rough constant in the pH range of 4.4–9.6. Both polarity and structure of an organic solvent are responsible for the phase transition point of the superabsorbent composite. POLYM. COMPOS., 2010. © 2009 Society of Plastics Engineers

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