The Christiansen effect of brightly colored colloidal dispersion with an amphiphilic polymer

Kento Okoshi; Naoko Sano; Takamitsu Okumura; Akihiro Tagaya; Jun Magoshi; Yasuhiro Koike; Michiya Fujiki; Junji Watanabe

doi:10.1016/S0021-9797(03)00336-9

The Christiansen effect of brightly colored colloidal dispersion with an amphiphilic polymer

Kento Okoshi, Naoko Sano, Takamitsu Okumura, Akihiro Tagaya, Jun Magoshi, Yasuhiro Koike, Michiya Fujiki, Junji Watanabe

University

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

10 Citations (Scopus)

Abstract

A novel coloration phenomenon in a colloidal dispersion with an amphiphilic polymer was found. The dispersion consists of tetrahydrofuran (THF), an aqueous solution of sodium thiosulfate (Na₂S₂O₃·5H₂O), and hydroxypropylcellulose (HPC). The dispersion was emulsified by HPC as an amphiphilic polymer, so that the aqueous phase was confined in droplets in the THF matrix. It typically appeared bluish violet at room temperature and turned into blue with increasing temperature. In this system, the refractive indices of the inside and outside of the droplet coincided at a certain wavelength at which the light passes through without scattering, which is called the Christiansen effect. The color observed was successfully simulated by Mie's scattering theory in combination with the Christiansen effect.

Original language	English
Pages (from-to)	473-477
Number of pages	5
Journal	Journal of Colloid And Interface Science
Volume	263
Issue number	2
DOIs	https://doi.org/10.1016/S0021-9797(03)00336-9
Publication status	Published - 2003 Jul 15

Keywords

Christiansen effect
Colloid
Coloration
Hydroxypropylcellulose
Mie scattering

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Biomaterials
Surfaces, Coatings and Films
Colloid and Surface Chemistry

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10.1016/S0021-9797(03)00336-9

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title = "The Christiansen effect of brightly colored colloidal dispersion with an amphiphilic polymer",

abstract = "A novel coloration phenomenon in a colloidal dispersion with an amphiphilic polymer was found. The dispersion consists of tetrahydrofuran (THF), an aqueous solution of sodium thiosulfate (Na2S2O3·5H2O), and hydroxypropylcellulose (HPC). The dispersion was emulsified by HPC as an amphiphilic polymer, so that the aqueous phase was confined in droplets in the THF matrix. It typically appeared bluish violet at room temperature and turned into blue with increasing temperature. In this system, the refractive indices of the inside and outside of the droplet coincided at a certain wavelength at which the light passes through without scattering, which is called the Christiansen effect. The color observed was successfully simulated by Mie's scattering theory in combination with the Christiansen effect.",

keywords = "Christiansen effect, Colloid, Coloration, Hydroxypropylcellulose, Mie scattering",

author = "Kento Okoshi and Naoko Sano and Takamitsu Okumura and Akihiro Tagaya and Jun Magoshi and Yasuhiro Koike and Michiya Fujiki and Junji Watanabe",

note = "Funding Information: This work was supported by CREST (Core Research for Evolutional Science and Technology) of JST (Japan Science and Technology Corporation).",

year = "2003",

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day = "15",

doi = "10.1016/S0021-9797(03)00336-9",

language = "English",

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T1 - The Christiansen effect of brightly colored colloidal dispersion with an amphiphilic polymer

AU - Okoshi, Kento

AU - Sano, Naoko

AU - Okumura, Takamitsu

AU - Tagaya, Akihiro

AU - Magoshi, Jun

AU - Koike, Yasuhiro

AU - Fujiki, Michiya

AU - Watanabe, Junji

N1 - Funding Information: This work was supported by CREST (Core Research for Evolutional Science and Technology) of JST (Japan Science and Technology Corporation).

PY - 2003/7/15

Y1 - 2003/7/15

N2 - A novel coloration phenomenon in a colloidal dispersion with an amphiphilic polymer was found. The dispersion consists of tetrahydrofuran (THF), an aqueous solution of sodium thiosulfate (Na2S2O3·5H2O), and hydroxypropylcellulose (HPC). The dispersion was emulsified by HPC as an amphiphilic polymer, so that the aqueous phase was confined in droplets in the THF matrix. It typically appeared bluish violet at room temperature and turned into blue with increasing temperature. In this system, the refractive indices of the inside and outside of the droplet coincided at a certain wavelength at which the light passes through without scattering, which is called the Christiansen effect. The color observed was successfully simulated by Mie's scattering theory in combination with the Christiansen effect.

AB - A novel coloration phenomenon in a colloidal dispersion with an amphiphilic polymer was found. The dispersion consists of tetrahydrofuran (THF), an aqueous solution of sodium thiosulfate (Na2S2O3·5H2O), and hydroxypropylcellulose (HPC). The dispersion was emulsified by HPC as an amphiphilic polymer, so that the aqueous phase was confined in droplets in the THF matrix. It typically appeared bluish violet at room temperature and turned into blue with increasing temperature. In this system, the refractive indices of the inside and outside of the droplet coincided at a certain wavelength at which the light passes through without scattering, which is called the Christiansen effect. The color observed was successfully simulated by Mie's scattering theory in combination with the Christiansen effect.

KW - Christiansen effect

KW - Colloid

KW - Coloration

KW - Hydroxypropylcellulose

KW - Mie scattering

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U2 - 10.1016/S0021-9797(03)00336-9

DO - 10.1016/S0021-9797(03)00336-9

M3 - Article

C2 - 12909038

AN - SCOPUS:0038385176

SN - 0021-9797

VL - 263

SP - 473

EP - 477

JO - Journal of Colloid and Interface Science

JF - Journal of Colloid and Interface Science

IS - 2

ER -

The Christiansen effect of brightly colored colloidal dispersion with an amphiphilic polymer

Abstract

Keywords

ASJC Scopus subject areas

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