Three-dimensional structure of a nanocomposite material consisting of two kinds of nanofillers and rubbery matrix studied by transmission electron microtomography
Three-dimensional structure of a nanocomposite material consisting of two kinds of nanofillers and rubbery matrix studied by transmission electron microtomography
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DOI：
10.1021/ma071102d
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发表时间：
2007-09-04
期刊：
影响因子：
5.5
通讯作者：
Nishi, Toshio
中科院分区：
文献类型：
--
作者：
Jinnai, Hiroshi;Shinbori, Yuki;Nishi, Toshio
通过透射电子显微断层扫描（TEMT）研究了嵌入橡胶基质中的颗粒填料的三维（3D）形态。两种类型的纳米填料，即，炭黑（CB）和二氧化硅（Si）纳米颗粒用作纳米填料。虽然CB和Si纳米颗粒难以通过常规透射电子显微镜（TEM）区分，但它们通过TEMT出现不同; CB和Si纳米颗粒在TEMT 3D重建的横截面图像中分别出现中空和实心颗粒，这表明TEMT本身提供了独特的颗粒区分功能。发现纳米颗粒在基质中形成聚集体。有趣的是，每个聚集体仅由一种物质组成;没有一个聚集体同时含有CB和Si纳米颗粒。开发了一种颗粒填充算法来估计聚集体内每个初级纳米颗粒的位置。
The three-dimensional (3D) morphology of particulate fillers embedded in a rubbery matrix was examined by transmission electron microtomography (TEMT). Two types of nanofillers, i.e., carbon black (CB) and silica (Si) nanoparticles, were used as the nanofillers. Although the CB and Si nanoparticles were difficult to distinguish by conventional transmission electron microscopy (TEM), they appeared different by TEMT; the CB and Si nanoparticles appeared to be hollow and solid particles in the cross-sectional images of the TEMT 3D reconstruction, respectively, demonstrating that TEMT itself provided a unique particle-discriminative function. The nanoparticles were found to form aggregates in the matrix. It is intriguing that each aggregate was made of only one species; not a single aggregate contained both the CB and Si nanoparticles. A particle-packing algorithm was developed to estimate the positions of each primary nanoparticle inside the aggregates.