Centre for Ionics University of Malaya, Department of Physics, Faculty of Science, Universiti Malaya, 50603, Kuala Lumpur, Malaysia.
King Abdullah Institute for Nanotechnology, King Saud University, P.O. Box-2455, 11451, Riyadh, Saudi Arabia.
Sci Rep. 2023 Jun 2;13(1):8946. doi: 10.1038/s41598-023-35154-z.
In this study, acrylic-epoxy-based nanocomposite coatings loaded with different concentrations (0.5-3 wt.%) of graphene oxide (GO) nanoparticles were successfully prepared via the solution intercalation approach. The thermogravimetric analysis (TGA) revealed that the inclusion of GO nanoparticles into the polymer matrix increased the thermal stability of the coatings. The degree of transparency evaluated by the ultraviolet-visible (UV-Vis) spectroscopy showed that the lowest loading rate of GO (0.5 wt.%) had completely blocked the incoming irradiation, thus resulting in zero percent transmittance. Furthermore, the water contact angle (WCA) measurements revealed that the incorporation of GO nanoparticles and PDMS into the polymer matrix had remarkably enhanced the surface hydrophobicity, exhibiting the highest WCA of 87.55º. In addition, the cross-hatch test (CHT) showed that all the hybrid coatings exhibited excellent surface adhesion behaviour, receiving 4B and 5B ratings respectively. Moreover, the field emission scanning electron microscopy (FESEM) micrographs confirmed that the presence of the functional groups on the GO surface facilitated the chemical functionalization process, which led to excellent dispersibility. The GO composition up to 2 wt.% showed excellent dispersion and uniform distribution of the GO nanoparticles within the polymer matrix. Therefore, the unique features of graphene and its derivatives have emerged as a new class of nanofillers/inhibitors for corrosion protection applications.
在这项研究中，通过溶液插层法成功制备了负载不同浓度（0.5-3wt.%）氧化石墨烯（GO）纳米粒子的丙烯酸-环氧基纳米复合涂层。热重分析（TGA）表明，GO 纳米粒子的加入增加了涂层的热稳定性。紫外-可见（UV-Vis）光谱评估的透光率表明，最低的 GO 负载率（0.5wt.%）完全阻挡了入射辐射，因此透光率为零。此外，水接触角（WCA）测量表明，GO 纳米粒子和 PDMS 的掺入显著提高了表面疏水性，表现出最高的 WCA 为 87.55°。此外，十字划线试验（CHT）表明，所有的杂化涂层都表现出优异的表面附着力，分别获得 4B 和 5B 评级。此外，场发射扫描电子显微镜（FESEM）照片证实，GO 表面上存在的官能团促进了其化学功能化过程，从而实现了优异的分散性。GO 含量高达 2wt.%时，GO 纳米粒子在聚合物基体中表现出良好的分散性和均匀分布。因此，石墨烯及其衍生物的独特性质已经成为一类用于腐蚀防护应用的新型纳米填料/抑制剂。
