44 Swelling equilibria and dye adsorption studies of chemically crosslinked superabsorbent acrylamide/maleic acid hydrogels

Author(s): Karadag, E; Uzum, OB; Saraydin, D

Title: Swelling equilibria and dye adsorption studies of chemically crosslinked superabsorbent acrylamide/maleic acid hydrogels

Source: EUROPEAN POLYMER JOURNAL, 38 (11): 2133-2141 NOV 2002

Language: English

Document Type: Article

Author Keywords: swelling; acrylamide/maleic acid; superswelling hydrogel; dye adsorption

Keywords Plus: AQUEOUS-SOLUTION; COPOLYMERS; BEHAVIOR; RELEASE

Abstract: Superswelling acrylamide (AAm)/maleic acid (MA) hydrogels were prepared by free radical polymerization in aqueous solution of AAm with MA as comonomer with some multifunctional crosslinkers such as trimethylolpropane triacrylate and 1,4-butanediol dimethacrylate. AAm/MA hydrogels were used in experiments on swelling and adsorption of a water-soluble monovalent cationic dye such as Basic Blue 17 (Toluidin Blue). As a result of dynamic swelling tests, the influence of relative content of MA on the swelling properties of the hydrogel systems was examined. AAm/MA hydrogels were swollen in the range 1660-6050% in water, while AAm hydrogels swelled in the range 780-1360%. Equilibrium water content of AAm/MA hydrogels were calculated in the range 0.8873-0.9837. Water intake of hydrogels followed a non-Fickian type diffusion. The uptake of the cationic dye, BB-17 to AAm/MA hydrogels is studied by batch adsorption technique at 25 degreesC. In the experiments of the adsorption equilibrium, S-type adsorption in Giles's classification system was found. The binding ratio of hydrogel/dye systems was gradually increased with the increase of MA content in the AAm/MA hydrogels. (C) 2002 Elsevier Science Ltd. All rights reserved.

Addresses: Adnan Menderes Univ, Fac Fen Edebiyat, Dept Chem, TR-09010 Aydin, Turkey; Cumhuriyet Univ, Dept Chem, TR-58140 Sivas, Turkey

Reprint Address: Karadag, E, Adnan Menderes Univ, Fac Fen Edebiyat, Dept Chem, TR-09010 Aydin, Turkey.

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Cited Reference Count: 27

Times Cited: 3

Publisher: PERGAMON-ELSEVIER SCIENCE LTD

Publisher Address: THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND

ISSN: 0014-3057

29-char Source Abbrev.: EUR POLYM J

ISO Source Abbrev.: Eur. Polym. J.

Source Item Page Count: 9

Subject Category: POLYMER SCIENCE

ISI Document Delivery No.: 597ZC