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聚苯胺-氮化硼纳米颗粒复合水性环氧涂层的制备与防腐性能研究

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  • 1江西理工大学化学化工学院; 2中国科学院宁波材料技术与工程研究所; 3杭州本创科技有限公司
刘 栓(1986-), 博士, 高级工程师, 研究方向为海洋重防腐涂料, E-mail: liushuan@nimte.ac.cn

收稿日期: 2023-06-05

  修回日期: 2023-08-14

  录用日期: 2023-09-10

  网络出版日期: 2024-03-08

基金资助

杭州本创科技公司科技项目;国家重点研发计划“深海水下电液作动器(EHA)研制与应用示范”(2023YFC2809901)资助

Preparation and Anti-Corrosion Properties of Polyaniline-Boron Nitride Nanoparticle Composite Waterborne Epoxy Coating

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  • (1.School of Chemistry and Chemical Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China;2.Ningbo Institute of Materials Technologies and Engineering, Chinese Academy of Sciences, Ningbo 315201, China;3.Hangzhou Benchuang Technology Co., Ltd., Hangzhou 310030, China)
LIU Shuan (1986-), Ph.D., Senior Engineer, Research Focus: Marine Heavy Anticorrosive Coatings, E-mail:liushuan@nimte.ac.cn

Received date: 2023-06-05

  Revised date: 2023-08-14

  Accepted date: 2023-09-10

  Online published: 2024-03-08

Supported by

Science and Technology Project of Hangzhou Benchuang Technology Co., Ltd.; National Key R&D Program “Development and Application Demonstration of Deepsea Underwater Electro-Hydraulic Actuator (EHA)”(Item number:2023YFC2809901)

摘要

为了提升水性环氧涂层在高盐、高湿海洋环境中的防腐性能和耐久性能,在羟基化的六方氮化硼表面通过原位聚合生长聚苯胺(PANI)得到聚苯胺/氮化硼纳米颗粒(PBN),将PBN 作为防腐填料来增强水性环氧涂层的防腐性能。 通过傅里叶变换红外光谱(FT-IR)和电子扫描电镜(SEM)对纳米颗粒的结构与微观形貌进行表征,采用电化学测试和中性盐雾试验(NSS)探究氮化硼、PANI 改性水性环氧涂层和PBN 添加量对水性环氧涂层的防腐性能的影响。 结果表明:PANI 在BN 纳米片表面原位生长形成珊瑚状结构,向水性环氧涂层中添加0.50%(质量分数,下同)PBN 后的粘结强度达到6.05 MPa,在3.5%NaCl 溶液中浸泡120 h 后的腐蚀电流密度(1.99×10-9 A/cm2)比纯环氧涂层(1.01×10-6 A/cm2)降低约3 个数量级。 这归因于添加的0.50%PBN 能均匀分散在环氧树脂中,填补涂层的微小空隙并提升对腐蚀介质的阻隔作用,同时PANI 具有缓蚀作用,二者协同提高纯环氧涂层的防腐性能。

本文引用格式

安然, 韩飞, 兰柯, 李柱, 郭小平, 刘栓 . 聚苯胺-氮化硼纳米颗粒复合水性环氧涂层的制备与防腐性能研究[J]. 材料保护, 2024 , 57(2) : 18 -27 . DOI: 10.16577/j.issn.1001-1560.2024.0029

Abstract

For improving the anti-corrosion performance and durability of waterborne epoxy coatings in high-salt, high-humidity marine environments, polyaniline/boron nitride nanoparticles (PBN) were prepared by the in-situ polymerization of polyaniline (PANI) on the surface of hydroxylated hexagonal boron nitride (BN).In addition, PBN were used as anti-corrosion filler to enhance the anti-corrosion performance of waterborne epoxy coatings.The structure and micro-morphology of nano-particles were characterized by Fourier transform infrared spectroscopy(FT-IR) and scanning electron microscopy (SEM).Moreover, electrochemical tests and neutral salt spray tests (NSS) were used to explore the effects of BN, PANI modifications and PBN addition amount on the anti-corrosion performance of waterborne epoxy coatings.Results showed that PANI grew in situ on the surface of BN nanosheets to form a coral-like structure, and the bonding strength of waterborne epoxy coating reached 6.05 MPa after adding 0.50%(mass fraction,the same below) PBN.The corrosion current density (1.99×10-9 A/cm2) of the composite coating immersed in 3.5%NaCl solution after 120 h was reduced by about 3 orders of magnitude compared to that of pure epoxy coating (1.01×10-6 A/cm2).This was attributed to the fact that the addition of 0.50%PBN could evenly disperse in the epoxy resin, fill small gaps in the coating and enhance the barrier effect against corrosive medium.Meanwhile, PANI had a corrosion inhibition effect, which could synergistically improve the anti-corrosion performance of pure epoxy coatings.
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