سال انتشار: ۱۳۸۷

محل انتشار: دومین کنگره بین المللی علوم و فناوری نانو

تعداد صفحات: ۲

نویسنده(ها):

Jamal Aalaie – Chemical Engineering Department, Tarbiat Modares University, Jalal Al Ahmad Highway
Ebrahim Vasheghani-Farahani –
Mohammad Ali Semsarzadeh –
Ali Rahmatpour – Polymer Science and Technology Division, Research Institute of Petroleum Industry (RIPI

چکیده:

Recently, to overcome the weakness and limitations of the conventional hyrogels, preparation of nanocomposite hydrogels have attracted more attention [1-4]. These nanocomposite (NC) hydrogels have excellent properties, such as mechanical toughness, large deformability, high swelling /deswelling rates, and high transparency. These remarkable improvements in properties of nanocomposite hydrogels were ascribed to their characteristic network structure [2,5]. While the preparation and properties of the composite and nanocomposite hydrogels synthesized by free-radical polymerization/gelation of the monomers in the presence of the clays with or without additional use of organic cross-linkers have been studied by various investigators [1-8], there are only a few reports about the preparation of NC hydrogels crosslinked by metallic cross-linkers in the presence of the clay [9-10]. In this research, novel nanocomposite hydrogels were prepared by crosslinking of aqueous solutions of sulfonated polyacrylamide (PAMPS)/sodium montmorilonite (Na+ – MMT) with chromium triacetate. The rheological behavior, microstructure and influence of clay content and salt concentration on swelling behavior were studied