Reinforcing efficiency of nanoparticles: A simple comparison for polymer nanocomposites
Reinforcing efficiency of nanoparticles: A simple comparison for polymer nanocomposites
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DOI：
10.1016/j.compscitech.2007.10.033
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发表时间：
2008-05-01
影响因子：
9.1
通讯作者：
Brinson, L. Catherine
中科院分区：
文献类型：
--
作者：
Liu, Hua;Brinson, L. Catherine
从微观力学角度比较了纳米管和纳米片两种纳米粒子的力学增强效果。此外，解决了在纳米颗粒附近的主体聚合物分子的动力学改变所产生的界面区。结果表明，纳米管通常具有上级机械增强潜力超过纳米片的对齐取向，而高的面内各向同性模量的纳米片允许更好地增强在随机取向。然而，在相同的体积分数下，在相同的分散度和对周围聚合物分子的影响程度的假设下，纳米管产生比纳米片显著更大量的界面相。然后，界面效应可以压倒基本的纳米颗粒的影响，并导致更高的刚度为所有配置的纳米管复合材料。这些简单而富有洞察力的比较可以为纳米复合材料的设计提供指导。(C)2007爱思唯尔有限公司保留所有权利。
The mechanical reinforcing efficiencies of two types of nanoparticles, nanotube and nanoplatelet, are compared from a micro-mechanics perspective. Additionally, the interphase zone created by altered dynamics of host polymer molecules in the vicinity of the nanoparticles is addressed. The results indicate that nanotubes generally have superior mechanical reinforcement potential beyond that of nanoplatelets for aligned orientations, while the high in-plane isotropic modulus of nanoplatelets allows better reinforcing in random orientations. However, at the same volume fraction, under the assumption of identical degree of dispersion and extent of influence on the surrounding polymer molecules, the nanotubes generate a significantly larger amount of interphase than the nanoplatelets. The interphase effects can then overwhelm the basic nanoparticle influence and lead to higher stiffnesses for all configurations of nanotube composites. These simple yet insightful comparisons may provide guidance in the design of nanocomposites. (C) 2007 Elsevier Ltd. All rights reserved.