摘要
为了提高水性聚氨酯涂层防腐性能,以对苯二胺作为还原剂,采用Hummer法合成氧化石墨烯(GO)来得到改性石墨烯(PGO),最后与聚苯胺(PANI)进行复合制备得到PANI/PGO,将其作为填料加入水性聚氨酯乳液(WPU)中,混合均匀后涂刷至马口铁板上,对涂层进行FTIR和XRD表征.研究了复合涂层的热稳定性、力学性能、吸水性、疏水性能、耐腐蚀性能和耐酸碱性能.研究结果表明,复合涂层PANI/PGO2表现出较优异的耐腐蚀性能、耐酸碱性能及力学性能.当PGO含量为0.05%时,涂层抗拉强度达到19.8MPa,延伸率达到98.3%,涂层硬度5H,吸水率为2.26%,水接触角为70.3°,腐蚀速率可达到0.002mm/a,具备较好的防腐性能.改性石墨烯的添加,可以显著提高聚苯胺水性聚氨酯涂料的力学和防腐性能.
In order to improve the anticorrosive properties of waterborne polyurethane coatings,graphene oxide(GO)was synthesized by Hummer’s method using p-phenylenediamine as a reductant to obtain modified graphene(PGO).Finally,it was compounded with polyaniline(PANI)to prepare PANI/PGO.It was added into waterborne polyurethane lotion(WPU)as a filler,mixed evenly,and then brushed onto tinplate,and the coating was characterized by FTIR and XRD.The thermal stability,mechanical properties,water absorption,hydrophobicity,corrosion resistance,and acid-base resistance of the composite coating were investigated.The results show that the composite coating PANI/PGO 2 exhibits excellent corrosion resistance,acid and alkali resistance,and mechanical properties.When the PGO content is 0.05%,the tensile strength of the coating reaches 19.8 MPa,the elongation reaches 98.3%,the hardness of the coating is 5 H,the water absorption rate is 2.26%,the water contact angle is 70.3°,and the corrosion rate can reach 0.002 mm/a,indicating good anti-corrosion performance.The addition of modified Graphene can significantly improve the mechanical and anticorrosion properties of polyaniline waterborne polyurethane coatings.
作者
方涛
余欢
徐振华
尹红
刘杰胜
谭晓明
FANG Tao;YU Huan;XU Zhenhua;YIN Hong;LIU Jiesheng;TAN Xiaoming(School of Civil Engineering and Architecture,Wuhan Polytechnic University,Wuhan 430023,China;Pilot-scale Platform of Marine Engineering Structural Protective Materials,Wuhan Polytechnic University,Wuhan 430023,China)
出处
《辽宁师范大学学报（自然科学版）》
CAS
2024年第1期59-69,共11页
Journal of Liaoning Normal University:Natural Science Edition
基金
湖北省教育厅科学技术研究项目(B2022235)
湖北省自然科学基金资助项目(2021CFB583)
武汉轻工大学科研项目(2023Y48,2022RZ021)。
关键词
改性石墨烯
聚苯胺
水性聚氨酯
防腐
modified graphene
polyaniline
water-based polyurethane
anti-corrosion
