Real space structure of opaque gel

Yukiko Doi; Masayuki Tokita

doi:10.1021/la050453n

Real space structure of opaque gel

Yukiko Doi, Masayuki Tokita

Condensed Matter Physics

Research output: Contribution to journal › Article › peer-review

18 Citations (Scopus)

Abstract

The structure of the opaque poly(acrylamide) gels is studied by using a confocal laser scanning microscope. The polymer network of the gel consists of the fractal aggregate of the colloidal particles in the higher concentration region of the cross-linker. The diameter of the colloidal particle, which formed in the gel, increases from 180 to 420 nm with an increase of the concentration of cross-linker. On the other hand, the fractal dimensions of the aggregate remain constant, ranging from 1.5 to 1.7. The densities of the particle are calculated to be 0.7 and 1.2 × 10³ kg/m³, which are > 10 times larger than the average density of the polymer network of the gel. The results indicate that the monomer and the cross-linker are densely cross-linked into the particles.

Original language	English
Pages (from-to)	5285-5289
Number of pages	5
Journal	Langmuir
Volume	21
Issue number	12
DOIs	https://doi.org/10.1021/la050453n
Publication status	Published - Jun 7 2005

All Science Journal Classification (ASJC) codes

Physical and Theoretical Chemistry
Colloid and Surface Chemistry

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10.1021/la050453n

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title = "Real space structure of opaque gel",

abstract = "The structure of the opaque poly(acrylamide) gels is studied by using a confocal laser scanning microscope. The polymer network of the gel consists of the fractal aggregate of the colloidal particles in the higher concentration region of the cross-linker. The diameter of the colloidal particle, which formed in the gel, increases from 180 to 420 nm with an increase of the concentration of cross-linker. On the other hand, the fractal dimensions of the aggregate remain constant, ranging from 1.5 to 1.7. The densities of the particle are calculated to be 0.7 and 1.2 × 103 kg/m3, which are > 10 times larger than the average density of the polymer network of the gel. The results indicate that the monomer and the cross-linker are densely cross-linked into the particles.",

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AB - The structure of the opaque poly(acrylamide) gels is studied by using a confocal laser scanning microscope. The polymer network of the gel consists of the fractal aggregate of the colloidal particles in the higher concentration region of the cross-linker. The diameter of the colloidal particle, which formed in the gel, increases from 180 to 420 nm with an increase of the concentration of cross-linker. On the other hand, the fractal dimensions of the aggregate remain constant, ranging from 1.5 to 1.7. The densities of the particle are calculated to be 0.7 and 1.2 × 103 kg/m3, which are > 10 times larger than the average density of the polymer network of the gel. The results indicate that the monomer and the cross-linker are densely cross-linked into the particles.

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Real space structure of opaque gel

Abstract

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