Self-healing hybrid nanocomposite anticorrosive coating from epoxy/modified nanosilica/perfluorooctyl triethoxysilane
Self-healing hybrid nanocomposite anticorrosive coating from epoxy/modified nanosilica/perfluorooctyl triethoxysilane
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DOI：
10.1016/j.porgcoat.2016.12.020
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发表时间：
2017-03-01
影响因子：
6.6
通讯作者：
Guan, Guoqing
中科院分区：
文献类型：
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作者：
Kongparakul, Suwadee;Kornprasert, Saktip;Guan, Guoqing
为了提高环氧涂层的防腐蚀性能，将含自修复微胶囊的环氧树脂与有机硅烷改性的纳米SiO2复合，制备了自修复纳米复合材料。用3-缩水甘油氧基丙基三甲氧基硅烷（GPTMS）和3-氨丙基三甲氧基硅烷（APTES）对纳米二氧化硅进行表面改性，使其在聚合物基体中分散良好。将全氟辛基三乙氧基硅烷（POT）、乙醇胺（ETA）和二乙醇胺（DEA）作为自修复剂包覆于聚合物壳层中，并与改性纳米SiO2一起沿着于环氧树脂涂层中，在冷轧钢板表面形成有机-无机复合防腐蚀涂层。结果表明，含3wt%GPTMS改性SiO2（GMS）和10wt%POT微胶囊的自修复杂化纳米复合材料具有最好的腐蚀性能，腐蚀速率为0.09mm/年（I-corr为0.01mA/cm（2）），腐蚀等级为9，透氧率约为0.14barrer。改性二氧化硅（GMS）和自愈合剂微胶囊（POT）的加入有效地增加了扩散路径的长度，以及降低了纳米复合膜的O-2渗透性。(C)2016爱思唯尔B. V.保留所有权利。
Self-healing hybrid nanocomposite was successfully prepared from epoxy resin containing self-healing microcapsules and organosilane modified nanosilica to enhance the anticorrosion performance of an epoxy coating. Nanosilica surface was modified with (3-glycidoxypropyl)trimethoxysilane (GPTMS) and (3-aminopropyl)trimethoxysilane (APTES) to accomplish Well dispersion in the polymer matrix. Perfluorooctyl triethoxysilane (POT), ethanolamine (ETA), and diethanolamine (DEA) as self-healing agents were encapsulated by polymer shell and incorporated into the epoxy coating along with modified nanosilica to form anticorrosion barrier of organic and inorganic coating on a cold-rolled steel surface (CRS). The results revealed that the self-healing hybrid nanocomposite containing 3 wt% of GPTMS-modified silica (GMS) and 10 wt%POT microcapsules possessed the best corrosion performance with the corrosion rate of 0.09 mm/year (I-corr of 0.01 mA/cm(2)), corrosion rating number of 9 and oxygen permeability about 0.14 barrer. The addition of modified silica (GMS) and self-healing agent microcapsules (POT) effectively increased the length of the diffusion pathways, as well as decreased the O-2 permeability of the nanocomposite film. (C) 2016 Elsevier B.V. All rights reserved.