摘要： 为增进水性环氧树脂涂层的力学性能与耐腐蚀性，选用聚醚胺对氧化石墨烯（ GO）边缘羧基进行化学改性，并与水性环氧树脂复合制备了改性氧化石墨烯 /水性环氧（ AGO/EP）复合涂层。探究了 AGO的含量对复合涂层微结构、力学性能和耐腐蚀性的影响。结果表明： AGO在水性环氧中均匀分散且与水性环氧存在良好的界面作用，形成了一定有序层状结构，有效提升了水性环氧树脂涂层的拉伸强度与断裂伸长率。水性环氧复合涂层（ 0. 5%AGO/EP）的低频阻抗模值达到 4. 47×108 Ω·cm2，AGO的引入有效抑制了水汽和盐离子对钢板基材的腐蚀，复合涂层的耐盐雾腐蚀性能显著提高。
关键词:
聚醚胺,
氧化石墨烯,
水性环氧,
耐腐蚀性
Abstract: To improve the mechanical properties and corrosion resistance of water-based epoxy coatings，polyether amine was used to chemically modify the carboxyl group at the edgeof graphene oxide（GO）to prepare modified graphene oxide（AGO）， and modified graphene oxide/waterborne epoxy（AGO/EP） composite coating was prepared by compounding with waterborne epoxy resin. The effects of AGO content on the microstructure，mechanical properties and corrosion resistance of composite coatings were investigated. The results showedthat AGO was uniformly dispersed in waterborne epoxy and had a good interface effect withwaterborne epoxy，forming a certain ordered layered structure，which enhanced the tensile strength and elongation at break of the coating. The low frequency impedance modulus of thewater-based epoxy composite coating（0. 5%AGO/EP）reached 4.47×108 Ω·cm2. The addition of AGO effectively inhibit the corrosion of water vapor and salt ions on the steel plate substrate，and the salt spray corrosion resistance of the composite coating was significantlyimproved.
Key words:
polyether amine,
graphene oxide,
waterborne epoxy,
corrosion resistance
中图分类号:
韩卓洒, 尹召颖, 赵彦冰, 等. 改性氧化石墨烯 /水性环氧复合涂层的制备及性能研究[J]. 涂料工业, 2024, 54(8): 39-44.
HAN Z S, YIN Z Y, ZHAO Y B, et al. Preparation and properties of modified graphene oxide/waterborne epoxy composites coating[J]. Paint & Coatings Industry, 2024, 54(8): 39-44.