Characteristics of Charge Carrier of Epoxy Resin Based Nanocomposites Filled With Graphene Oxide at High Temperatures

ZHANG Hongliang; ZHANG Siyu; LIU Peng; FENG Hua; LI Ding; PENG Zongren

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Characteristics of Charge Carrier of Epoxy Resin Based Nanocomposites Filled With Graphene Oxide at High Temperatures

更新时间：2025-12-08

- Characteristics of Charge Carrier of Epoxy Resin Based Nanocomposites Filled With Graphene Oxide at High Temperatures
- Vol. 44, Issue 12, Pages: 3814-3823(2018)
- 作者机构：
  
  1. 兰州理工大学电气工程与信息工程学院
  2. 西安交通大学电力设备电气绝缘国家重点实验室
  3. 甘肃省工业过程先进控制重点实验室
  4. 兰州理工大学国家级电气与控制工程实验教学中心
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published Online：31 December 2018，
  
  Published：2018
- 稿件说明：
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ZHANG Hongliang, ZHANG Siyu, LIU Peng, et al. Characteristics of Charge Carrier of Epoxy Resin Based Nanocomposites Filled With Graphene Oxide at High Temperatures[J]. 2018, 44(12): 3814-3823.
DOI：

ZHANG Hongliang, ZHANG Siyu, LIU Peng, et al. Characteristics of Charge Carrier of Epoxy Resin Based Nanocomposites Filled With Graphene Oxide at High Temperatures[J]. 2018, 44(12): 3814-3823. DOI：

摘要

采用原位还原法制备了不同的氧化石墨烯/环氧树脂复合材料试样

对复合材料的微观结构及官能团进行了表征

测量了其玻璃化转变温度和宽频介电谱。微观结构分析表明

单层氧化石墨烯与环氧基体结合较好

而多层氧化石墨烯与环氧基体结合较差

导致多层氧化石墨烯/环氧复合材料的玻璃化转变温度下降明显。利用复交流电导率和模量形式

分析了不同温度下复合材料电荷载流子的特性。当温度高于复合材料的玻璃化转变温度时

其直流电导率随温度的变化关系均符合Vogel-Fulcher-Tammann模型;环氧、单层氧化石墨烯/环氧树脂复合材料在高于其玻璃化转变温度时的直流电导主要是电子跳跃电导

其活化能分别为0.58 eV和0.68 eV;而多层氧化石墨烯/环氧树脂复合材料在温度处于120～150℃之间时

其直流电导主要是电子跳跃电导

活化能为0.98 eV

在160℃以上开始出现离子跳跃电导

活化能为0.32 eV。

Abstract

We prepared the graphene oxide/epoxy resin nanocomposites by adding graphene oxide into epoxy matrix by the in-situ reduction method. The microstructures and functional groups of the nanocomposites were characterized

and their glass transition temperatures and broadband dielectric spectroscopy were also measured. The microstructure analysis shows that the combination of single-layer graphene oxide（SGO） and epoxy resins（ER） matrix is better than that of multilayered grapheme oxide（MGO） and epoxy resins matrix

which leads to the decrease of glass transition temperature of MGO/ER. The characteristics of charge carriers of composite at various temperatures were analyzed by using the complex conductance and modulus. The results reveal that when the temperature is higher than the glass transition temperature of the composites

the temperature dependence of the DC conductivity is in accordance with the Vogel-Fulcher-Tammann model. The conductance of ER and SGO/ER are mainly generated by the electronic jump conductance

in which the activation energies were 0.58 e V and 0.68 e V

respectively. The DC conduction of MGO/ER is also the electronic jump conduction during 120 ℃～150 ℃

in which activation is 0.98 eV. At above 160 ℃

the ion jump conductance begins to appear in MGO/ER

in which activation is 0.32 eV.

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