Superabsorbent nanocomposite (alginate-g-PAMPS/MMT): Synthesis, characterization and swelling behavior

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• 作者：Mithilesh Yadav ; Kyong Yop Rhee
• 关键词：Sodium alginate ; 2-Acrylamido-2-methyl-1-propanesulfonic acid ; Montmorillonite ; Swelling ratio ; N ; N&prime ; -methylenebisacrylamide
• 刊名：Carbohydrate Polymers
• 出版年：2012
• 出版时间：1 September, 2012
• 年：2012
• 卷：90
• 期：1
• 页码：165-173
• 全文大小：1183 K

文摘

A superabsorbent composite (alginate-g-PAMPS/MMT) was prepared by graft copolymerization from alginate, 2-acrylamido-2-methyl-1-propanesulfonic acid (AMPS) and Na+ montmorillonite (MMT) in an inert atmosphere. Effects of polymerization variables on water absorbency, including the content of Na+ montmorillonite, sodium alginate, N,N¡ä-methylenebisacrylamide and AMPS, were studied. The introduced montmorillonite formed a loose and porous surface and improved the water absorbency of the alginate-g-PAMPS/MMT superabsorbent composite. Swelling behaviors of the superabsorbent composites in various cationic salt solutions (NaCl, CaCl₂ and FeCl₃) and anionic salt solutions (NaCl and Na₂SO₄) were also systematically investigated. The superabsorbent composite was further characterized using Fourier transform infrared spectroscopy (FTIR), rheology, thermogravimetric analysis (TGA), X-ray diffraction (XRD) and scanning electron microscopy (SEM) taking alginate-g-PAMPS as a reference.