Homogeneous dispersion of cellulose/graphite oxide nanofibers in water-based urushiol coatings with improved mechanical properties and corrosion resistance

IF 2.3 4区 材料科学 Q2 Chemistry Journal of Coatings Technology and Research Pub Date : 2023-07-10 DOI:10.1007/s11998-023-00770-x
Lei Zhang, Haitang Wu, Chonglin Zhao, Lingce Kong, Xiaohua Huang
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Abstract

A polymeric coating based on a reactive urushiol-based polymeric emulsion was synthesized by grafting cellulose nanofibers (CNF) and graphene oxide (GO) onto the urushiol backbone, followed by phase inversion to obtain a cellulose nanofiber-graphene oxide/water-based urushiol emulsion (GO-CNF/WU). Following silane treatment (APTES), well-dispersed CNF-GO composites were obtained due to molecular interactions at the interface (including covalent, π-π and hydrogen bonding) between CNF and GO, resulting in a WU polymer which served as a mixing matrix to stabilize and improve the resulting GO-CNF through chemical-crosslinking. As expected, the mechanical properties (hardness and adhesion) and anticorrosion protection of the WU films were improved considerably after incorporating GO-CNF composites at fairly low concentrations. Compared to the WU film, the coated tinplate with the GO-CNF/WU coating displayed higher anticorrosion efficiency, with a PE of 99%. In addition, the pencil hardness of the GO-CNF/WU coatings increased significantly, from 2 to 6H, and adhesion was remarkably enhanced from grade 6 to 1 after the addition of 10% MGO to the films. Due to the synergistic protective effect of CNF and GO, the method may represent a facile and environmentally friendly approach to integrate multi-nanoscale blocks into WU polymer with excellent mechanical properties and corrosion resistance.

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纤维素/氧化石墨纳米纤维在水性漆酚涂层中的均匀分散,提高了机械性能和耐腐蚀性
将纤维素纳米纤维(CNF)和氧化石墨烯(GO)接枝到漆酚骨架上,制备了反应性漆酚基聚合物乳液聚合物涂层,然后进行相转化得到纤维素纳米纤维-氧化石墨烯/水性漆酚乳液(GO-CNF/WU)。经过硅烷处理(APTES),由于CNF和GO之间在界面处的分子相互作用(包括共价、π-π和氢键),得到了分散良好的CNF-GO复合材料,从而形成了WU聚合物,作为混合基质,通过化学交联稳定和改善得到的GO-CNF。正如预期的那样,在相当低的浓度下加入GO-CNF复合材料后,WU膜的机械性能(硬度和附着力)和防腐性能都得到了显著改善。与WU膜相比,涂有GO-CNF/WU涂层的马口铁具有更高的防腐效率,PE达到99%。此外,添加10% MGO后,GO-CNF/WU涂层的铅笔硬度从2级显著提高到6H,附着力从6级显著提高到1级。由于CNF和氧化石墨烯的协同保护作用,该方法可能是一种简单而环保的方法,可以将多纳米级块整合到具有优异机械性能和耐腐蚀性的WU聚合物中。
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来源期刊
Journal of Coatings Technology and Research
Journal of Coatings Technology and Research CHEMISTRY, APPLIED-MATERIALS SCIENCE, COATINGS & FILMS
CiteScore
4.40
自引率
8.70%
发文量
0
期刊介绍: Journal of Coatings Technology and Research (JCTR) is a forum for the exchange of research, experience, knowledge and ideas among those with a professional interest in the science, technology and manufacture of functional, protective and decorative coatings including paints, inks and related coatings and their raw materials, and similar topics.
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