New valve-free organosilica nanocontainer for active anticorrosion of polymer coatings
New valve-free organosilica nanocontainer for active anticorrosion of polymer coatings
复制标题
用于聚合物涂层主动防腐的新型无阀有机二氧化硅纳米容器
DOI：
10.1016/j.compositesb.2021.109185
复制
发表时间：
2021-11
期刊：
影响因子：
--
通讯作者：
Songqing Hu
中科院分区：
文献类型：
--
作者：
Meng Cheng;Fengting Li;Zhikun Wang;Chunling Li;Shuangqing Sun;Songqing Hu
具有负载抑制剂的纳米容器的智能涂层在延长金属寿命和减少灾难性故障方面表现出显着的效率和耐久性。然而，这种涂层的结垢和进一步的实际智能防腐蚀应用仍然受到各种纳米阀的耗时安装的极大限制。本文采用选择性刻蚀法制备了中空有机硅杂化介孔材料，并将其作为无阀纳米容器用于智能防腐蚀涂料的制备。实验和计算结果充分证明，通过货物-框架相互作用，实现了缓蚀剂释放和涂层主动防腐蚀的智能功能。具体而言，缓蚀剂在中性pH下被包裹，在酸性条件下释放，使纳米容器自发地经历涂层损伤和腐蚀开始引起的pH变化，然后快速响应，实现腐蚀的原位修复。相应地，含有负载的纳米容器的涂层样品在NaCl溶液中的暴露显示出可忽略的腐蚀，并且表现出Rc的增加（从606.1 kΩ cm 2到2967 kΩ cm 2）和Rct（从244.1 kΩ cm ~ 2到1985.5 kΩ cm ~ 2），而对照样品的Rct则显著恶化（分别从118.7 kΩ cm 2下降到46.9 kΩ cm 2和从5.22 kΩ cm 2下降到1.93 kΩ cm 2）。值得注意的是，这种自然门控方法将为智能防腐涂料的智能纳米传递系统的制备提供新的思路。
Smart coatings with inhibitor loaded nanocontainers exhibit significant efficiency and durability in prolonging metal life-time and reducing catastrophic failure. However, scaling and further practical intelligent anticorrosion applications of such coatings are still greatly limited by time-consuming installation of various nanovalves. Herein, hybrid hollow mesoporous organosilica was obtained by facile selective etching and served as valve-free nanocontainer to prepare smart anticorrosive coatings. Intelligent functions for inhibitor release and coating active corrosion protection are executed by the cargo-framework interaction, which is sufficiently demonstrated by experimental and computational results. Specifically, inhibitor is encapsulated at neutral pH and released under acidic conditions, which can make nanocontainer spontaneously undergo the pH changes resulted from coating damage and corrosion onset, then respond quickly to achieve in situ repair of corrosion. Correspondingly, exposure of the coating sample containing loaded nanocontainer in NaCl solution shows negligible corrosion and exhibits an increase of Rc(from 606.1 kΩ cm2to 2967 kΩ cm2) and Rct(from 244.1 kΩ cm2to 1985.5 kΩ cm2) with the immersion time, while significant deterioration of controlled samples (Rctfrom 118.7 kΩ cm2to 46.9 kΩ cm2and from 5.22 kΩ cm2to 1.93 kΩ cm2, respectively). Notably, this nature-gated approach will provide novel idea for the preparation of smart nano delivery system for smart anticorrosive coatings.
登录
查看更多内容
刺激响应沸石咪唑酯框架可实现聚合物涂层的腐蚀传感和主动保护
影响因子：
9.5
作者：
Liu Chengbao;Qian Bei;Hou Peimin;Song Zuwei
通讯作者：
Song Zuwei
人造珍珠质混合薄膜的设计作为减轻电磁污染的屏蔽
影响因子：
10.9
作者：
Yuan Bihe;Bao Chenlu;Qian Xiaodong;Song Lei;Tai Qilong;Liew Kim Meow;Hu Yuan
通讯作者：
Hu Yuan
影响因子：
--
作者：
Houbing Zou;Runwei Wang;Xiaoxin Li;Xue Wang;Shangjing Zeng;S. Ding;Lu Li;Zongtao Zhang;S. Qiu
通讯作者：
Houbing Zou;Runwei Wang;Xiaoxin Li;Xue Wang;Shangjing Zeng;S. Ding;Lu Li;Zongtao Zhang;S. Qiu
影响因子：
--
作者：
Houbing Zou;Runwei Wang;Zhiqiang Shi;J. Dai;Zongtao Zhang;S. Qiu
通讯作者：
Houbing Zou;Runwei Wang;Zhiqiang Shi;J. Dai;Zongtao Zhang;S. Qiu
影响因子：
29.4
作者：
Hewei Zhao;Yonghai Yue;Lin Guo;Juntao Wu;Youwei Zhang;Xiaodong Li;Shengcheng Mao;Xiaodong Han
通讯作者：
Hewei Zhao;Yonghai Yue;Lin Guo;Juntao Wu;Youwei Zhang;Xiaodong Li;Shengcheng Mao;Xiaodong Han