Adsorption of cationic dyes within spherical particles of poly(N-isopropylacrylamide) hydrogel containing smectite

Takanori Nakamura, Makoto Ogawa

Research output: Contribution to journalArticle

14 Citations (Scopus)


Spherical particle of poly(N-isopropylacrylamide) hydrogel containing smectite clay (a synthetic saponite) was prepared by the polymerization of N-isopropylacrylamide in aqueous clay suspension. The diameter of the gel particle is 800-1300. nm and the clay content is 11. wt.% (clay/poly(N-isopropylacrylamide)). The gel particle was shown to be useful adsorbent of cationic species from water as a result of strong electrostatic interactions between smectites and the cationic species. Due to the fact that the cation adsorption capacity to the present hybrid hydrogel particles is determined by the cation exchange capacity of clay, the hydrogel particles containing clay are a useful scaffold to immobilize various cationic species to construct functional hybrid gel particles.

Original languageEnglish
Pages (from-to)469-473
Number of pages5
JournalApplied Clay Science
Publication statusPublished - 2013 Oct



  • Adsorption
  • Fluorescence
  • Gel
  • Hybrid
  • Ion exchange
  • Poly[N-isopropylacrylamide]

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geology

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