Insight into anticorrosion/thermal stability behavior of protection system composed of waterborne polyurethane containing SiOx/TiO2@Ti3C2

The purpose of this paper was to evaluate the feasibility of MXenes (Ti3C2Tx) enforcing corrosion resistance performance and thermal stability of waterborne polyurethane (WPU). Firstly, the Ti3C2Tx was modified by hydrolysis of titanium butoxide (TBOT) and the 1H, 1H, 2H, 2H-perfluorodecyltriethoxysilane. Then, the modified Ti3C2Tx (SiOx/TiO2@Ti3C2) was grafted into the WPU composite. The electrochemistry station and thermal analysis technique was used to detailly evaluate the effect of SiOx/TiO2@Ti3C2 on the anticorrosion performance and thermal stability of all samples. The results revealed that the WPU with 0.15% SiOx/TiO2@Ti3C2 showed the best thermal stability and anticorrosion performance. In detail, 0.15% SiOx/TiO2@Ti3C2/WPU improved the 31.71 °C Tmax1 compared with that of WPU. In terms of electrochemistry results, after 28 days of immersion in 3.5 wt.% NaCl solution, the |Z|f=0.01 Hz of WPU was 3.65 × 106 Ω·cm2. However, the |Z|f=0.01 Hz of 0.15% SiOx/TiO2@Ti3C2/WPU was still at 1.15 × 107 Ω·cm2, after 64 days of immersion in 3.5 wt.% NaCl solution. In a word, this work opened up a novel strategy to enhance the performances of WPU polymer via introducing the SiOx/TiO2@Ti3C2.