Synthesis and properties of starch-graft-acrylic acid/Na-montmorillonite superabsorbent nanocomposite hydrogels

Al E., Guclu G., Iyim T. B., Emik S., Ozgumus S. K.

JOURNAL OF APPLIED POLYMER SCIENCE, cilt.109, sa.1, ss.16-22, 2008 (SCI-Expanded, Scopus) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 109 Sayı: 1
  • Basım Tarihi: 2008
  • Doi Numarası: 10.1002/app.27968
  • Dergi Adı: JOURNAL OF APPLIED POLYMER SCIENCE
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.16-22
  • Anahtar Kelimeler: starch, nanocomposite hydrogel, basic dye, safranine T, montmorillonite, AQUEOUS-SOLUTIONS, BASIC-DYES, CARBOHYDRATE POLYMERS, METAL-IONS, ADSORPTION, REMOVAL, COPOLYMERIZATION, POLYACRYLONITRILE, POLYMERIZATION, EQUILIBRIUM
  • İstanbul Üniversitesi-Cerrahpaşa Adresli: Evet

Özet

The graft copolymerization of acrylic acid (AA) onto starch was carried out with monomer/starch weight ratio = 1.5. Cerium ammonium nitrate (CAN) and N,N'-methylenebis acrylamide (NMBA) were used as initiator and crosslink agent, respectively. Na-montmorillonite was used as nanoparticles. Starch-graft-acrylic acid/Na-MMT (S-g-AA/MMT) nanocomposite hydrogels were characterized by X-ray diffraction (XRD) and FTIR analysis. The effect of Na-MMT content in nanocomposite hydrogels on the swelling behavior was investigated. Increasing the Na-MMT/monomers ratio up to 1% causes an increment in water absorbency, which indicates that Na-MMT can improve the ability of water absorbency but further increase of Na-MMT causes a decrease in water absorbency. In addition, we describe the removal of safranine T from aqueous solutions using S-g-AA/MMT nanocomposite hydrogels. Effects of various parameters such as treatment time, initial dye concentration, and amount of the Na-MMT were investigated. The Freundlich equations were used to fit the equilibrium isotherms. (C) 2008 Wiley Periodicals, Inc.