[1]余倩倩,邓佳芃.炭黑环氧树脂复合材料力电性能研究[J].西安建筑科技大学学报(自然科学版),2022,(02):228-236.[doi:10.15986/j.1006-7930.2022.02.009]
 YU Qianqian,DENG Jiapeng.Electromechanical properties of carbon black/epoxy resin composites[J].J. Xi’an Univ. of Arch. & Tech.(Natural Science Edition),2022,(02):228-236.[doi:10.15986/j.1006-7930.2022.02.009]
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炭黑环氧树脂复合材料力电性能研究()
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西安建筑科技大学学报(自然科学版)[ISSN:1006-7930/CN:61-1295/TU]

卷:
期数:
2022年02期
页码:
228-236
栏目:
出版日期:
2022-04-28

文章信息/Info

Title:
Electromechanical properties of carbon black/epoxy resin composites
文章编号:
1006-7930(2022)02-0228-09
作者:
余倩倩12邓佳芃12
(1.工程结构性能演化与控制教育部实验室(同济大学),上海 200092; 2.同济大学 土木工程学院, 上海 200092)
Author(s):
YU Qianqian12 DENG Jiapeng12
(1.Key Laboratory of Performance Evolution and Control for Engineering Structures(Ministry of Education), Tongji University, Shanghai 200092, China; 2.College of Civil Engineering, Tongji University, Shanghai 200092, China)
关键词:
炭黑 环氧树脂 导电性能 力学性能 力电性能
Keywords:
carbon black epoxy electrical conductivity mechanical property electromechanical property
分类号:
TU398+.9
DOI:
10.15986/j.1006-7930.2022.02.009
文献标志码:
A
摘要:
本文对炭黑环氧树脂复合材料力电性能展开试验研究.变量包括炭黑掺量和制备流程,研究其对环氧树脂导电性能、力学性能和力电性能的影响,并采用扫描电镜对炭黑分散形态进行表征.结果表明:添加丙酮可有效增加环氧树脂流动性,延长有效搅拌时间,从而促进炭黑分散增加导电路径,提高导电性能.对于8%炭黑掺量的复合材料,添加丙酮可使电阻率降低8 000倍左右.随着炭黑掺量的增加,复合材料电阻率降低,4%时导电性提高较为明显.炭黑的掺入导致复合材料抗拉强度降低,但掺量与抗拉强度变化量之间无明显关系.随着拉伸应变的增加,复合材料电阻增大,且电阻变化率与应变有较好的对应关系.电镜扫描结果表明:炭黑以网络结构的形式存在于环氧树脂中,网络结构由炭黑团聚和环氧树脂间隙组成; 随炭黑掺量的增加,网络结构更加密集.
Abstract:
This paper presents an experimental study on electromechanical properties of carbon black/epoxy resin(CB/EP)composites. Effects of the content of carbon black and manufacture procedures on electrical, mechanical and electromechanical properties of CB/EP composites were investigated. In addition, the dispersion morphology of carbon black was characterized by scanning electron microscope(SEM). Results showed that adoption of acetone could be used to increase fluidity of the epoxy and to extend the effective stirring time, leading to better dispersion of carbon black and consequently increased conductive paths. For the composite with the CB content of 8%, adding acetone effectively reduced the resistivity about 8 000 times. Conductivity of the composite gradually increased with the CB content, with the minimum resistivity observed in the case with the CB content of 4%. Presence of carbon black exhibited a detrimental effect on the tensile strength which deserves future work. In terms of electromechanical properties, change in resistance of the composite samples proportionally increased with the tensile strain, indicating a potential feasibility of monitoring of stress/strain state of the composites. SEM photos showed that CB exists in epoxy resin in the form of network structures, which was composed of carbon black agglomeration and epoxy resin gap. The network structures became denser as the content of CB increased.

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备注/Memo

备注/Memo:
收稿日期:2021-04-01修改稿日期:2021-04-20
基金项目:国家自然科学基金(51878485)、上海市青年科技启明星计划(19QC1400400)
第一作者:余倩倩(1987—),女,博士,副教授,主要从事结构性能提升、新材料和新型结构的研究.E-mail:qianqian.yu@tongji.edu.cn
更新日期/Last Update: 2022-04-28