王贤明,李文,李航,陈守刚,刘盈,肖锋.GO/Si3N4改性环氧树脂涂层防腐透波性能研究[J].表面技术,2021,50(5):303-314.
WANG Xian-ming,LI Wen,LI Hang,CHEN Shou-gang,LIU Ying,XIAO Feng.Anticorrosion and Wave Transmission Properties of GO/Si3N4 Modified Epoxy Resin Coatings[J].Surface Technology,2021,50(5):303-314
GO/Si3N4改性环氧树脂涂层防腐透波性能研究
Anticorrosion and Wave Transmission Properties of GO/Si3N4 Modified Epoxy Resin Coatings
投稿时间:2020-11-02  修订日期:2020-12-24
DOI:10.16490/j.cnki.issn.1001-3660.2021.05.034
中文关键词:  透波防腐  防护涂料  制备  复合纳米填料  氧化石墨烯  氮化硅  环氧树脂
英文关键词:wave transmission and corrosion resistance  protective coatings  preparation  composite nanofiller  graphene oxide  silicon nitride  epoxy resin
基金项目:海洋涂料国家重点试验室开放课题基金(GZ-19-0004);中央高校基本科研业务费专项(202065001)
作者单位
王贤明 海洋涂料国家重点试验室,山东 青岛 266071 
李文 中国海洋大学 材料科学与工程学院,山东 青岛 266100 
李航 中国海洋大学 材料科学与工程学院,山东 青岛 266100 
陈守刚 中国海洋大学 材料科学与工程学院,山东 青岛 266100 
刘盈 中国海洋大学 材料科学与工程学院,山东 青岛 266100 
肖锋 海军潜艇学院,山东 青岛 266199 
AuthorInstitution
WANG Xian-ming State Key Laboratory of Marine Coatings, Qingdao 266071, China 
LI Wen School of Materials Science and Engineering, Ocean University of China, Qingdao 266100, China 
LI Hang School of Materials Science and Engineering, Ocean University of China, Qingdao 266100, China 
CHEN Shou-gang School of Materials Science and Engineering, Ocean University of China, Qingdao 266100, China 
LIU Ying School of Materials Science and Engineering, Ocean University of China, Qingdao 266100, China 
XIAO Feng PLA Naval Submarine Academy, Qingdao 266199, China 
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中文摘要:
      目的 设计并制备集透波、耐蚀一体化天线罩防护涂层。方法 利用KH550与KH560硅烷偶联剂分别对GO与Si3N4进行改性,分别得到改性的f-GO与f-Si3N4,然后将两者进行复合,制得了不同配比的f-GO/f-Si3N4纳米复合材料,将所得纳米复合物填料对环氧树脂涂层进行改性。通过扫描电子显微镜解析改性填料在涂层中的分布状态,利用电化学交流阻抗、极化曲线、吸水试验等方法,分别评价改性涂层的吸水率、耐蚀性,利用介电常数与介电损耗正切值,评价涂层透波性能。结果 借助两种硅烷改性,实现了f-GO与f-Si3N4的化学键合复合。随着f-GO在复合填料中比例的增加,复合填料在环氧树脂涂层中的分散性先升高后下降。涂层极化曲线表明,GS-15改性的环氧树脂涂层具有最小的腐蚀电流密度(1.62×10–11 A/cm2)和最高的腐蚀电位(–0.462 V)。涂层电化学阻抗测试表明,当涂层浸泡至3000 h后,GS-15涂层的|Z|0.01 Hz值为9.2×1010 Ω∙cm2,比GS-0涂层的低频阻抗模量高约2个数量级。涂层吸水率测试表明,GS-15改性环氧树脂涂层具有最小的吸水率。涂层介电性能测试表明,GS-15改性环氧树脂涂层的介电稳定性更高,同时具有最低的介电常数和介电损耗。结论 在环氧树脂中当复合填料的添加量为5%时,f-Si3N4与f-GO配比为7∶3时,复合材料在环氧树脂涂层中的分散性最佳,涂层具有最好的耐腐蚀和透波性能。
英文摘要:
      This paper is intended to design and prepare a radome protective coating with integrated excellent wave transmission and corrosion resistance. Firstly, silane coupling agents of 3-aminopropyl triethoxysilane (KH550) and γ-(2,3- epoxypropoxy) propyltrimethoxysilane (KH-560) were used to modify graphene oxide(GO) and silicon nitride(Si3N4) to prepare f-GO and f-Si3N4, respectively. Then, f-GO and f-Si3N4 were combined by covalent bond due to the reaction between the epoxy group and amino group in the modified KH560 and KH550, respectively. Five kinds of f-GO/f-Si3N4 composite materials were prepared by regulating the contents of f-GO in the composite materials. After that, the f-GO/f-Si3N4 composite materials with mass fraction of 5wt.% were added into the epoxy based composite coatings which were used as nanofiller. The dispersion states of the f-GO/f-Si3N4 composite materials were studied by SEM images of coating surface and fracture surface. The anticorrosion performances of the composite coatings were estimated by polarization curves, electrochemical impedances and water absorption. Moreover, the wave transmission performances of the coatings were measured by dielectric constant and dielectric loss tangent. The properties and structure of f-GO and f-Si3N4 were confirmed by FT-IR spectra, XPS spectra, TEM images, and TG curves. The results also showed that the dispersion of the f-GO/f-Si3N4 composite materials increased at first and then decreased as the content of f-GO in above composite materials increasing. From the polarization curves, the epoxy coating modified by GS-15 obtained the minimum corrosion current density (1.62×10–11 A/cm2) and much more positive corrosion potential (–0.462 V) among the title coating compositions. Electrochemical impedance spectroscopy showed that the |Z|0.01 Hz of the GS-15 modified epoxy coating after 3000 h immersion was 9.2×1010 Ω cm2, which was two orders of magnitude higher than the low frequency impedance of GS-0 modified epoxy coating. The GS-15 modified epoxy coating also showed the lowest water absorption. The dielectric properties of the coatings could also indicate that GS-15 modified epoxy coating had higher dielectric stability and the lowest dielectric constant and dielectric loss. According to the above results, the f-GO/f-Si3N4 modified epoxy coating has the best corrosion resistance and wave transmission performance, when the ratio of f-Si3N4 to f-GO is 7 to 3 with 5wt.% addition of the composite nanofiller in the composite coatings.
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