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通过掺入功能化氧化石墨烯对室温硫化硅橡胶的无阻隔性能研究

Study on NO Barrier Properties of RTV Silicone Rubber by Incorporation of Functional Graphene Oxide.

作者信息

Huang Zhen, Zhang Jinshuai, Wang Zheng, Peng Xiangyang, Fang Jiapeng, He Chunqing, Fang Pengfei

机构信息

Guangdong Key Laboratory of Electric Power Equipment Reliability, Electric Power Research Institute of Guangdong Power Grid Co., Ltd., Guangzhou 510080, China.

Key Laboratory of Nuclear Solid State Physics Hubei Province, School of Physics and Technology, Wuhan University, Wuhan 430072, China.

出版信息

Materials (Basel). 2023 Feb 28;16(5):1982. doi: 10.3390/ma16051982.

DOI:10.3390/ma16051982
PMID:36903097
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10003996/
Abstract

In this study, functional graphene oxide (f-GO) nanosheets were prepared to enhance the NO resistibility of room-temperature-vulcanized (RTV) silicone rubber. A nitrogen dioxide (NO) accelerated aging experiment was designed to simulate the aging process of nitrogen oxide produced by corona discharge on a silicone rubber composite coating, and then electrochemical impedance spectroscopy (EIS) was used to test the process of conductive medium penetration into silicone rubber. After exposure to the same concentration (115 mg·L) of NO for 24 h, at an optimal filler content of 0.3 wt.%, the impedance modulus of the composite silicone rubber sample was 1.8 × 10 Ω·cm, which is an order of magnitude higher than that of pure RTV. In addition, with an increase in filler content, the porosity of the coating decreases. When the content of the nanosheet increases to 0.3 wt.%; the porosity reaches a minimum value 0.97 × 10%, which is 1/4 of the porosity of the pure RTV coating, indicating that this composite silicone rubber sample has the best resistance to NO aging.

摘要

在本研究中，制备了功能化氧化石墨烯（f-GO）纳米片以提高室温硫化（RTV）硅橡胶的抗NO性能。设计了二氧化氮（NO）加速老化实验，以模拟电晕放电产生的氮氧化物对硅橡胶复合涂层的老化过程，然后使用电化学阻抗谱（EIS）测试导电介质渗透到硅橡胶中的过程。在相同浓度（115 mg·L）的NO中暴露24 h后，在最佳填料含量为0.3 wt.%时，复合硅橡胶样品的阻抗模量为1.8×10Ω·cm，比纯RTV高一个数量级。此外，随着填料含量的增加，涂层的孔隙率降低。当纳米片含量增加到0.3 wt.%时，孔隙率达到最小值0.97×10%，是纯RTV涂层孔隙率的1/4，表明该复合硅橡胶样品具有最佳的抗NO老化性能。

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