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    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/7469

    Title: 液態乳膠中微粒子在含有高分子鏈油滴表面上的堆疊;Polymer-mediated Microsphere Packing in Liquid Emulsion Droplets
    Authors: 賴亮杰;Liang-jie Lai
    Contributors: 物理研究所
    Keywords: 球表面的最佳堆疊;膠體叢聚;乳膠;油滴;微米球;optimal packing on the sphere;colloidal cluster;emulsion;droplet;microsphere
    Date: 2007-06-08
    Issue Date: 2009-09-22 10:58:25 (UTC+8)
    Publisher: 國立中央大學圖書館
    Abstract: 我們在水包油的乳膠中觀察到新式的膠體叢聚。在這乳膠中,油滴裡分散著高分子鏈,而其表面也有許多膠體微粒會貼近在上面,尤其這些高分子鏈會引發膠體微粒間的空乏力作用。當油滴裡的膠體微粒數N大於4的時候,我們觀察到相對於N有多於一種的堆積組態。我們可以將這些組態細分成三個種類:第一種是滿足最小二價矩(minimal second moment)的叢聚;第二種是滿足球面堆積的叢聚;第三種是非等邊多面叢聚。它們都是由不同的機制所形成。很顯然的,微粒子的初始堆疊狀態以及乳膠油滴裡的高分子鏈濃度,兩者都在最終堆疊結果上扮演著重要的腳色。 We observed new types of colloidal clusters produced from oil-in-water emulsions in which colloidal microspheres are attached to emulsion surface and polymer dispersed in oil phase. The polymer induces depletion interaction between microspheres. When the number of particles N inside the droplet is larger than 4, we observed more than one configurations for each N. We classified the configurations into three catogories: The first kind is a minimal second moment cluster; the second kind is a spherical packing cluster; the third kind is a non-equilateral polyhedron cluster. They are formed through different mechanisms. Both initial packing of microspheres and the concentration of polymer in emulsion droplets play roles in their final packing.
    Appears in Collections:[物理研究所] 博碩士論文

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