Developing polyimide-copper antifouling coatings with capsule structures for sustainable release of copper
Developing polyimide-copper antifouling coatings with capsule structures for sustainable release of copper
复制标题
开发具有胶囊结构的聚酰亚胺-铜防污涂料，以实现铜的可持续释放
DOI：
10.1016/j.matdes.2017.05.075
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发表时间：
2017-09-15
影响因子：
8.4
通讯作者：
Li, Hua
中科院分区：
文献类型：
--
作者：
Liu, Yi;Suo, Xinkun;Li, Hua
利用溶液前驱体火焰喷雾的方法，通过控制二酸酐与二胺在含铜纳米颗粒的二甲基甲酰胺溶剂中的反应，一步法制备了由单个胶囊状片层组成的聚酰亚胺-铜层。聚酰亚胺片材呈中空结构，内孔10~15微米，顶面有1~5微米的小孔。通过聚焦离子束球磨单个片层的横向切割和扫描电子显微镜表征，进一步揭示了铜纳米颗粒在聚酰亚胺壳层中的独特分散。在人工合成海水中浸泡1000h后，铜含量高达30wt%的涂层中铜的持续释放效果显著。通过检测典型细菌芽孢杆菌的定植行为，评价了构造层的防污性能。以及海藻三角褐指藻和小球藻的表面。无机纳米粒子的分布赋予了聚酰亚胺涂层特殊的胶囊结构和令人兴奋的疏水性和防污性能。液态火焰喷涂路线和聚酰亚胺-铜涂层的包覆结构将为设计和构建长期使用的环保型海洋防污层打开新的窗口。
Polyimide-copper layers consisting of individual capsule-like splats were one-step fabricated by solution precursor flame spray through controlling the reaction between dianhydride and diamine dissolved in copper nanoparticles-containing dimethylformamide solvent. The polyimide splat exhibited hollow structure with an inner pore of 10-15 mu m and a tiny hole of 1-5 mu m on its top surface. Transversal cut by focused ion beam milling of the individual splats and scanning electron microscopy characterization further revealed unique dispersion of the copper nanoparticles inside the polyimide shell. After 1000 h exposure to the testing synthetic seawater, continuous release of copper from the coatings containing up to 30 wt% Cu kept remarkable. Antifouling performances of the constructed layers were assessed by examining colonization behaviors of typical bacteria Bacillus sp. and marine algae Phaeodactylum tricornutum and Chlorella on their surfaces. Distribution of the inorganic nanoparticles endows the polyimide coatings with special capsule structure and exciting hydrophobicity and antifouling performances. The liquid flame spray route and the encapsulated structure of the polyimide-Cu coatings would open a new window for designing and constructing environment-friendly marine antifouling layers for long-term applications.[GRAPHICS].