Lao Li, Liu Kuo, Ren Li, Yu Jinhong, Cheng Jingzhen, Li Yuqi, Lu Shaorong
Key Laboratory of New Processing Technology for Nonferrous Metals and Materials, Ministry of Education, College of Materials Science and Engineering, Guilin University of Technology, Guilin 541004, China.
Key Laboratory of Marine Materials and Relater Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China.
ACS Omega. 2021 Mar 9;6(11):7434-7443. doi: 10.1021/acsomega.0c05866. eCollection 2021 Mar 23.
Developing waterborne epoxy (WEP) coatings with excellent corrosion resistance and tribological properties is a key aspect to solve the damage of Q235 steel. In this work, perylene bisimide (PBI) derivatives dispersion graphene (GR) were prepared by a π-π stacking, the highly orientated PBI/GR/WEP coating will be prepared by the rotating coating method. Especially, the impedance value reached about 10 Ω·cm when the PBI and GR ratio is 1:1. The impedance value of PBI/GR/WEP coating increased by 3 orders of magnitude compared with that of pure WEP coating (10 Ω·cm). Additionally, the coefficient of friction of the coatings was 0.33; compared with that of WEP, the coefficient of friction decreased by 48%, and the wear resistance increased by 87.6%. The results show that the PBI/GR/WEP coatings exhibited excellent corrosion resistance and wear resistance properties due to the good dispersion and high orientation of PBI/GR in WEP. It is anticipated that our current work would guide the ongoing efforts to develop a more efficient method to overcome the poor dispersion of GR in waterborne epoxy resin and provide a green coating with excellent corrosion resistance and wear resistance properties.
开发具有优异耐腐蚀性和摩擦学性能的水性环氧（WEP）涂料是解决Q235钢损伤问题的关键方面。在这项工作中，通过π-π堆积制备了苝酰亚胺（PBI）衍生物分散石墨烯（GR），并采用旋转涂布法制备了高度取向的PBI/GR/WEP涂层。特别是，当PBI与GR的比例为1:1时，阻抗值达到约10Ω·cm。与纯WEP涂层（10Ω·cm）相比，PBI/GR/WEP涂层的阻抗值增加了3个数量级。此外，涂层的摩擦系数为0.33；与WEP相比，摩擦系数降低了48%，耐磨性提高了87.6%。结果表明，由于PBI/GR在WEP中的良好分散和高取向性，PBI/GR/WEP涂层表现出优异的耐腐蚀性和耐磨性。预计我们目前的工作将指导正在进行的努力，以开发一种更有效的方法来克服GR在水性环氧树脂中的分散性差的问题，并提供一种具有优异耐腐蚀性和耐磨性的绿色涂层。
