摘要
采用环氧树脂对水性聚氨酯接枝,再通过γ-氨丙基三乙氧基硅烷(KH550)与石墨烯表面含氧基团反应,得到硅烷偶联剂改性的氧化石墨烯,最后使两者复配得到稳定性良好、耐蚀性能优异的氧化石墨烯/环氧改性水性聚氨酯(GO/EPWPU)乳液。研究分析了不同环氧树脂含量对水性聚氨酯涂膜物理性能和耐介质性能的影响,通过电化学方法研究了涂层的耐蚀性能和防腐蚀行为。结果表明:环氧树脂用量为7%时,涂层力学性能、耐介质性能优异;与原始样品对比发现,添加改性石墨烯明显提升了涂层的耐蚀性能,此外,当改性石墨烯用量为1‰时,涂层耐蚀性能最好,通过观察涂层浸泡腐蚀过程,进一步分析了不同石墨烯用量的环氧改性水性聚氨酯涂层的防腐蚀行为。
Combined with the epoxy grafted waterborne polyurethane(EP-WPU)and silane-modified graphene oxide(MGO)with the reaction ofγ-aminopropyltriethoxysilane(KH550)with oxygen containing groups on the surface of graphene,the emulsion was prepared with good stability and corrosion resistance.The effects of the dosage of epoxy resin on physical property and corrosion protection performance of the film have been investigated,and the corrosion resistance behavior of film was studied by electrochemical impedance spectroscopy(EIS).Results revealed that film obtained excellent physical and dielectric resistance properties with 7%epoxy resin addition.Compared with the original samples,the modified grapheme oxide significantly enhanced the barrier and corrosion protection properties of the coating.Furthermore,the anticorrosion mechanisms of coatings enhanced via MGO with different ratio and the corrosion resistance behavior of coating in immersion process were tentatively proposed,which indicating that modified graphene oxide with 1‰ratio displayed better.
作者
毛定宣
晏应秋
梁红波
熊磊
黄圣梅
MAO Ding-xuan;YAN Ying-qiu;LIANG Hong-bo;XIONG Lei;HUANG Sheng-mei(School of Materials Science and Engineering,Nanchang Hangkong University,Nanchang 330063,China)
出处
《南昌航空大学学报（自然科学版）》
CAS
2019年第1期59-65,共7页
Journal of Nanchang Hangkong University(Natural Sciences)
基金
国家自然科学基金(21564009)
江西省自然科学基金(20171BAB206019)
江西省科技厅应用研究培育计划(20181BBE58003)
留学人员科技活动项目(赣人社函[2016]81号)
航空科学基金(2016ZF56022)
关键词
环氧树脂
聚氨酯乳液
氧化石墨烯
防腐蚀行为
epoxy resin
polyurethane emulsion
graphene oxide
corrosion resistance behavior
作者简介
通讯作者:梁红波(1976—),男,博士,教授,主要研究方向:新型光固化树脂、水性涂料。
