Electrochemically induced aggregation of intra-particle cationic nanogel complexes with a stoichiometric amount of bound polyanions

Colloid and Polymer Science volume 286, pages201–208(2008)Cite this article

Abstract

The present study aimed to see the effect of an applied electric field on the stability of a colloid system in which overall electroneutrality is maintained in a metastable state. We employed two polyelectrolyte nanogels (PENG) based on N,N′-methylenebisacrylamide (MBA)-cross-linked terpolymer composed of N-isopropylacrylamide (NIPA), acrylic acid (AAc) and 1-vinylimidazole (VI) and MBA-cross-linked copolymer of NIPA and VI. The complexes of these PENG particles with potassium poly(vinyl alcohol) sulfate (KPVS) were formed in an aqueous HCl solution (1 mM, pH 3) which allows a complete ionization of the PENG-fixed imidazole groups. The amount of KPVS anions was adjusted so as to become equivalent to that of PENG-fixed cations. The complex dispersion was electrolyzed in a simple cell made of a glass tube. A fine platinum wire was used as an electrode for both cathode and anode. It was suggested that the electrochemically induced increase in pH in the cathodic side causes the aggregation of the complex particles due to a partial dissociation of the bound polyanions from the complex.

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References

  1. 1.

    Pelton R (2000) Adv Colloid Interface Sci 85:1

    Article  CAS  Google Scholar 

  2. 2.

    Suzuki H, Wang B, Yoshida R, Kokufuta E (1999) Langmuir 15:4283

    Article  CAS  Google Scholar 

  3. 3.

    Kokufuta E (2005) Langmuir 21:10004

    Article  CAS  Google Scholar 

  4. 4.

    Ogawa K, Sato S, Kokufuta E (2005) Langmuir 21:4830

    Article  CAS  Google Scholar 

  5. 5.

    Ogawa K, Sato S, Kokufuta E (2007) Langmuir 23:2095

    Article  CAS  Google Scholar 

  6. 6.

    Miyake M, Ogawa K, Kokufuta E (2006) Langmuir 22:7335

    Article  CAS  Google Scholar 

  7. 7.

    Tanaka M, Grosberg A Yu (2002) Eur Phys J E 7:371

    CAS  Google Scholar 

  8. 8.

    Tanaka M (2004) J Phys, Condens Matter 16:S2127

    Article  CAS  Google Scholar 

  9. 9.

    Danial L Harp (2002) Current Technology of Chlorine Analysis for Water and Wastewater, Technical Information Series, Booklet No. 17, Hach Company, Loveland Colorado

  10. 10.

    Kokufuta E, Ogawa K, Doi R, Farinato RS (2007) J Phys Chem B 111:8634

    Article  CAS  Google Scholar 

  11. 11.

    Alberty RA (1948) J Chem Education 25:426

    CAS  Article  Google Scholar 

  12. 12.

    Dole VP (1945) J Amer Chem Soc 67:1119

    Article  CAS  Google Scholar 

Download references

Acknowledgment

This work was supported in part by Grant-in-Aids for Scientific Research to E.K. from the Japan Society for the Promotion of Science (no. 15350127 and no. 18655089).

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Affiliations

  1. Graduate School of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Ten-noudai, Tsukuba, Ibaraki, 305-8572, Japan

    Ryo Doi

  2. Graduate School of Life and Environmental Sciences and Institute of Applied Biochemistry, University of Tsukuba, 1-1-1 Ten-noudai, Tsukuba, Ibaraki, 305-8572, Japan

    Kazuyoshi Ogawa & Etsuo Kokufuta

Authors
  1. Ryo Doi
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  2. Kazuyoshi Ogawa
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  3. Etsuo Kokufuta
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Correspondence to Etsuo Kokufuta.

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Doi, R., Ogawa, K. & Kokufuta, E. Electrochemically induced aggregation of intra-particle cationic nanogel complexes with a stoichiometric amount of bound polyanions. Colloid Polym Sci 286, 201–208 (2008). https://doi.org/10.1007/s00396-007-1754-1

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Keywords

  • Polyelectrolyte nanogel complexes
  • Metastable charge-neutral colloid
  • Electrolysis
  • Electrochemically induced aggregation
  • Generated pH gradient
  • Partial polyion dissociation