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Superabsorbent polymer composite (SAPC) materials and their industrial and high-tech applications

Authors
  • Gao, D.
Publication Date
Jan 01, 2003
Source
OpenGrey Repository
Keywords
Language
English
License
Unknown

Abstract

Expanding clay/polyacrylamide composites have the capacity to absorb large amounts of water while retaining good mechanical strength and high damping characteristics, and therefore represent a new and promising class of hydrogel materials. Bentonite (montmorillonite) has been used as expanding clay mineral and a superabsorbent poly(acrylamide)-bentonite composite (SAPC) material has been prepared using electron beam and UV light irradiation. Characterization of SAPC using XRD, SEM, DSC, TGA, FTIR and NMR (27Al, 29Si and 12C) showed that the structure of SAPC was that of acrylamide combined with montmorillonite in three different ways: a. AM intercalated in the lamina of montmorillonite in bimolecular layers bound by van der Waals force and hydrogen bonds; b. AM bonded to the montmorillonite surface by hydrogen bonds; c. AM in free state as a polymer string network. Experimental results of rheological, mechanical, and thermal properties of SAPC showed a fully cross-linked structure and higher mechanical strength and thermal stability. Application of SAPC in oilfields (enhanced oil recovery), for environmental protection (acid mine tailing abatement), agriculture (plantation, seedling), in electric industry (cable sealing), petrochemical industry (fuel dewatering), civil engineering (concrete additives) and sensor industry (sensor materials) showed a high potential of this class of materials for environmentally compatible and economically viable uses. / Available from: <a href=http://www.deposit.ddb.de/cgi-bin/dokserv target=NewWindow>http://www.deposit.ddb.de/cgi-bin/dokserv</a> / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische Informationsbibliothek / SIGLE / DE / Germany

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