Structural transition of non-ionic poly(acrylamide) gel

Sada atsu Mukai, Hirohisa Miki, Vasyl Garamus, Regine Willmeit, Masayuki Tokita

Research output: Chapter in Book/Report/Conference proceedingChapter

1 Citation (Scopus)

Abstract

We discuss the structure of the opaque poly(acrylamide) gel that is synthesized at higher mole fractions of the cross-linking agent above 0.2. The structure of the opaque gel is analyzed by the small angle neutron scattering technique. The fractal analysis of the scattering function yields that the polymer network of the opaque poly(acrylamide) gel can be seen as a mass fractal of the fractal dimension of about DM ~ 2.7 when the mole fraction of the cross-linker is higher than 0.3. On the other hand, much larger exponents are obtained in the lower concentration region of the cross-linker less than 0.3. It suggests that the polymer network of the gel behaves as a surface fractal of the fractal dimension of DS ~ 2.5. The structure of the polymer network changes from the surface fractal to the mass fractal at the mole fraction of the cross-linker is 0.3 when the mole fraction of the cross-linker is increased from 0.2 to 0.5. The structure of the gel is also observed by using the confocal laser scanning microscope. The fractal analysis of the confocal images indicate that the fractal dimension of the two dimensional distribution of the colloidal particles in the cross section of the colloidal aggregate is found to be about 1.7.

Original languageEnglish
Title of host publicationGels
Subtitle of host publicationStructures, Properties, and Functions
EditorsMasayuki Tokita, Katsuyoshi
Pages95-100
Number of pages6
DOIs
Publication statusPublished - Dec 1 2009

Publication series

NameProgress in Colloid and Polymer Science
Volume136
ISSN (Print)0340-255X

All Science Journal Classification (ASJC) codes

  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Polymers and Plastics
  • Colloid and Surface Chemistry
  • Materials Chemistry

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  • Cite this

    Mukai, S. A., Miki, H., Garamus, V., Willmeit, R., & Tokita, M. (2009). Structural transition of non-ionic poly(acrylamide) gel. In M. Tokita, & Katsuyoshi (Eds.), Gels: Structures, Properties, and Functions (pp. 95-100). (Progress in Colloid and Polymer Science; Vol. 136). https://doi.org/10.1007/2882_2009_13