Preparation of polyacrylamide/graphite oxide superabsorbent nanocomposites with salt tolerance and slow release properties

• Published in: Journal of applied polymer science Vol. 129; no. 4; pp. 2328 - 2334
• Main Authors: Zhu, Zhao-Qi, Sun, Han-Xue, Li, Gui-Xian, Liang, Wei-Dong, Bao, Xue-Mei, An, Jin, La, Pei-Qing, Dai, Jian-Feng, Li, An
• Format: Journal Article
• Language: English
• Published: Hoboken Wiley Subscription Services, Inc., A Wiley Company 15.08.2013; Wiley; Wiley Subscription Services, Inc
• Subjects: Applied sciences; Composites; Crosslinking; Exact sciences and technology; Forms of application and semi-finished materials; gels; hydrophilic polymers; Materials science; Nanocomposites; Nanostructure; Networks; Oxides; Polyacrylamides; Polymer industry, paints, wood; Polymers; Swelling; Technology of polymers; Tolerances; Absorbent material; Salt resistance; Solution copolymerization; Acrylamide derivative copolymer; Composite material; composites; hydrophilic polymers; gels; Preparation; Acrylamide copolymer; Graphite Oxides; Water absorption; Nanocomposite; Chemical properties; Radical copolymerization; Water holding capacity
• ISSN: 0021-8995; 1097-4628
• DOI: 10.1002/app.38965

Novel polyacrylamide/graphite oxide (PAM/GO) superabsorbent nanocomposites were synthesized by a simple solution polymerization of acrylamide using N,N ′‐methylenebisacrylamide as crosslinker and ammonium persulfate as initiator. The well dispersion of GO nanoplatelets in the polymeric network results in a remarkable improvement on the comprehensive swelling performance of the resulting superabsorbent nanocomposites. The water absorption experimental results show that the superabsorbent nanocomposites could absorb water as twice as that of crosslinked polyacrylamide (PAM) superabsorbent with a weight gain of 400 g g−1 with a low loading of GO. The salt tolerance and water‐retention ability of the resulting PAM/GO superabsorbent nanocomposites are also enhanced compared with PAM. Moreover, by embedding of ammonium salt into PAM/GO network, the PAM/GO superabsorbent nanocomposites also exhibit a slow release behavior of ammonium salt from network when swelling in water, which makes the PAM/GO superabsorbent nanocomposites multifunctional absorbent materials with great potential for agricultural and horticultural applications. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013