Graphitic nanofillers in PMMA nanocomposites - An investigation of particle size influence on nanocomposite and dispersion and their properties
Graphitic nanofillers in PMMA nanocomposites - An investigation of particle size influence on nanocomposite and dispersion and their properties
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DOI：
10.1002/polb.21187
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发表时间：
2007-08-01
影响因子：
--
通讯作者：
Brinson, L. C.
中科院分区：
文献类型：
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作者：
Ramanathan, T.;Stankovich, S.;Brinson, L. C.
通过使用三种不同的石墨纳米填料：“原样石墨”(ARG)、“膨胀石墨”(EG)和“石墨纳米片”(GNPs)，评价了石墨/PMMA复合材料的力学、热和电性能与石墨纳米填料组分的粒度和分散性的关系。随后将EG在液体中超声处理，得到厚度约为10 nm的GNPs，形成薄层的石墨化小片。采用溶液法制备了这三种填料的PMMA复合材料。对所得复合材料进行了动态力学分析、热分析和电阻抗测试，结果表明，颗粒尺寸的减小、比表面积的增大和表面粗糙度的增加可以显著改变石墨/聚合物的界面，并提高聚合物基质的力学、热和电性能。(C)2007年威利期刊公司。
Mechanical, thermal, and electrical properties of graphite/PMMA composites have been evaluated as functions of particle size and dispersion of the graphitic nanofiller components via the use of three different graphitic nanofillers: "as received graphite" (ARG), "expanded graphite," (EG) and "graphite nanoplatelets" (GNPs) EG, a graphitic materials with much lower density than ARG, was prepared from ARG flakes via an acid intercalation and thermal expansion. Subsequent sonication of EG in a liquid yielded GNPs as thin stacks of graphitic platelets with thicknesses of similar to 10 nm. Solution-based processing was used to prepare PMMA composites with these three fillers. Dynamic mechanical analysis, thermal analysis, and electrical impedance measurements were carried out on the resulting composites, demonstrating that reduced particle size, high surface area, and increased surface roughness can significantly alter the graphite/polymer interface and enhance the mechanical, thermal, and electrical properties of the polymer matrix. (c) 2007 Wiley Periodicals, Inc.