首页|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

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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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.
Preparation and Anti-Corrosion Properties of Polyaniline-Boron Nitride Nanoparticle Composite Waterborne Epoxy Coating
For improving the anti-corrosion performance and durability of waterborne epoxy coatings in high-salt,high-humidity marine envi-ronments,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(1.99x10-9 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 coat-ing(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.

polyanilineboron nitridemodificationwaterborne epoxy coatinganti-corrosion performance

安然、韩飞、兰柯、李柱、郭小平、刘栓

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江西理工大学化学化工学院,江西 赣州 341000

中国科学院宁波材料技术与工程研究所,浙江宁波 315201

杭州本创科技有限公司,浙江杭州 310030

聚苯胺 氮化硼 改性 水性环氧涂层 防腐性

杭州本创科技公司科技项目国家重点研发计划National Key R&D Program"Development and Application Demonstration of Deepsea Underwater Electro-Hydraulic Actuator(EHA)"

2023YFC28099012023YFC2809901

2024

10.16577/j.issn.1001-1560.2024.0029

材料保护
武汉材料保护研究所,中国腐蚀与防护学会 中国表面工程协会

材料保护

CSTPCD
影响因子：1.129
ISSN：1001-1560
年,卷(期)：2024.57(2)
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