Electrically induced structure and ER effect of DNA particle suspensions

Keiji Minagawa, Atsushi Ogo, Hiroyuki Watanabe, Takeshi Mori, Masami Tanaka

    研究成果: 会議への寄与タイプ学会誌査読

    抄録

    Electrorheological (ER) suspensions were prepared with three types of DNA particles. The DNA particles used were unpurified salmon testes DNA, DNA purified by a standard method, and a DNA/lipid complex. These particles, having the average diameter of 15-20 μm, were respectively dispersed in silicone oil (1000 cSt). It was found from viscosity measurements under a DC electric field ranging between 0 and 2 kV/mm that these suspensions show an ER effect. The increase of viscosity was larger for the suspension of purified DNA particles than those of the unpurified DNA and the DNA/lipid complex suspensions. The ER effect evaluated as relative enhancement of viscosity was large when the particle concentration was 20 wt%. Repeated application of an electric field resulted in stabilized reversible increase of viscosity in response to the field. Although the ER effect of the suspensions prepared with the DNA/lipid complex was not so large, the chemical modification of DNA can be utilized for preparation of various types of DNA-based particles for ER fluids.

    本文言語英語
    ページ3149-3150
    ページ数2
    出版ステータス出版済み - 12月 1 2006
    イベント55th Society of Polymer Science Japan Symposium on Macromolecules - Toyama, 日本
    継続期間: 9月 20 20069月 22 2006

    その他

    その他55th Society of Polymer Science Japan Symposium on Macromolecules
    国/地域日本
    CityToyama
    Period9/20/069/22/06

    !!!All Science Journal Classification (ASJC) codes

    • 工学(全般)

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