Li Weihang, Song Bojun, Zhang Shirui, Zhang Fan, Liu Chang, Zhang Nan, Yao Huiling, Shi Yuanchang
Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (Ministry of Education), Shandong University, Jingshi Road 17923, Jinan 250061, China.
Polymers (Basel). 2020 Apr 6;12(4):837. doi: 10.3390/polym12040837.
In this paper, the graphene oxide loaded with nano titanium dioxide (TiO-GO) was synthesized through 3-isocyanatopropyltrimethoxysilane (IPTMS) and characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction analysis (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), thermogravimetric analysis (TGA), and dispersion test. The results illustrated our modification was successful and TiO-GO was transferred from hydrophilic to hydrophobic. That greatly enhanced the dispersity of TiO-GO in epoxy through the observation of the coating morphology test. Moreover, the impact of TiO-GO on anti-corrosion property in epoxy was investigated by Electrochemical Impedance Spectroscopy (EIS). Comparing to pristine particles including GO and TiO, TiO-GO could more significantly improve the resistance of corrosion with the help of IPTMS. Furthermore, the anti-corrosion mechanism of TiO-GO in epoxy was tentatively proposed and discussed.
本文通过3-异氰酸酯基丙基三甲氧基硅烷（IPTMS）合成了负载纳米二氧化钛的氧化石墨烯（TiO-GO），并通过傅里叶变换红外光谱（FTIR）、X射线衍射分析（XRD）、X射线光电子能谱（XPS）、扫描电子显微镜（SEM）、热重分析（TGA）和分散性测试对其进行了表征。结果表明我们的改性是成功的，TiO-GO从亲水性转变为疏水性。通过涂层形态测试观察发现，这极大地提高了TiO-GO在环氧树脂中的分散性。此外，通过电化学阻抗谱（EIS）研究了TiO-GO对环氧树脂防腐性能的影响。与包括GO和TiO在内的原始颗粒相比，TiO-GO在IPTMS的帮助下能够更显著地提高耐腐蚀性能。此外，还初步提出并讨论了TiO-GO在环氧树脂中的防腐机理。
