Study of the electrical conduction process in natural rubber‐based conductive nanocomposites filled with cellulose nanowhiskers coated by polyaniline,Polymer Composites

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Study of the electrical conduction process in natural rubber‐based conductive nanocomposites filled with cellulose nanowhiskers coated by polyaniline
Polymer Composites ( IF 4.8 ) Pub Date : 2020-12-18 , DOI: 10.1002/pc.25920
Michael J. Silva ₁ , Alex O. Sanches ₂ , Cicero R. Cena ₃ , Haroldo N. Nagashima ₂ , Eliton S. Medeiros ₄ , José A. Malmonge ₂

Affiliation

In the present work, the electrical properties of a natural rubber‐based nanocomposite (NR) filled with cellulose nanowhiskers (CNW) coated with polyaniline (PANI) were studied. We developed a statistic model that simulates nanocomposite microstructure and conductivity, calculated using the transfer matrix technique. A two‐dimensional network of resistors representing a microstructure of both the insulating region (NR) and conductive fillers (cellulose nanowhiskers coated with polyaniline ‐ CNWP) was developed. The conductance of bond between two neighboring sites in the CNWP filler and two neighboring sites of the NR matrix was estimated using Drude's equation and Dyre's formula, respectively. Results of the simulations show that the conduction process between two sites of NR follows the modified Dyre model (RFEB), while between two CNWP sites follows the modified Drude model. The theoretical‐experimental adjustment shows that the electrical conduction process occurs via hopping and tunneling between states located inside the CNWP phase, randomly distributed in the rubber matrix.

中文翻译：

填充聚苯胺涂层的纤维素纳米晶须的天然橡胶基导电纳米复合材料中导电过程的研究

在本工作中，研究了填充有聚苯胺（PANI）的纤维素纳米晶须（CNW）的天然橡胶基纳米复合材料（NR）的电性能。我们开发了一个统计模型，该模型可模拟使用传输矩阵技术计算的纳米复合材料的微观结构和电导率。开发了一个二维电阻网络，该电阻代表绝缘区域（NR）和导电填料（涂有聚苯胺-CNWP的纤维素纳米晶须）的微观结构。分别使用Drude方程和Dyre公式估算CNWP填料中两个相邻位点与NR矩阵的两个相邻位点之间的键导率。仿真结果表明，NR的两个位置之间的传导过程遵循改进的Dyre模型（RFEB），而在两个CNWP站点之间遵循改进的Drude模型。理论上的实验调整表明，导电过程是通过在CNWP相内部的状态之间随机地分布在橡胶基质中的状态之间的跳跃和隧穿而发生的。

更新日期：2020-12-18

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