pH响应型可降解纳米容器的制备及防腐性能*

Preparation and Anti-corrosion Properties of pH-responsive Degradable Nanocontainers

刘冬梅 石 鑫 杨 康 魏晓静 贾 犇 王文栋

LIU Dongmei SHI Xin YANG Kang WEI Xiaojing JIA Ben WANG Wendong

为了合成快速响应的纳米容器，实现缓蚀剂靶向释放，更好地解决油气田管道金属进一步腐蚀的状况，采 用修饰的St?ber法，改变无机和有机硅源的摩尔比合成了不同亚胺嵌入的有机硅纳米颗粒（S-SNPs）并负载缓蚀 剂MBT得到了智能缓蚀剂MBT@S-SNPs，并研究其智能防腐性能。研究结果表明，S-SNPs在中性环境下稳定， 而在酸性环境下发生降解，从而可以实现对缓蚀剂的控释。另外，电化学测试结果表明含有智能缓蚀剂腐蚀试 样的阻抗值为空白试样的5倍，有效缓解了腐蚀的发生。S-SNPs的响应降解以及与缓蚀剂之间的相互作用实现 了缓蚀剂的高效负载（16%）和pH响应释放。S-SNPs可响应腐蚀引起的pH变化，在腐蚀的靶向修复方面具有广 阔应用前景。图25参10

In order to achieve targeted release of corrosion inhibitors，and solve the situation of further corrosion of oil and gas pipeline metals，a rapidly responding container was synthesized by modified Stober method. Organic silicon nanoparticles （S-SNPs）embedded with different imines were synthesized by changing the mole ratio of inorganic and organic silicon sources and loaded with MBT to obtain the intelligent corrosion inhibitor MBT@S-SNPs，and its intelligent anticorrosion performance was studied. The results showed that S-SNPs was stable in a neutral environment，but would degrade in an acidic environment，which could achieve a controlled release of corrosion inhibitor. In addition，the impedance of the corrosion sample containing MBT@S-SNPs could be 5 times than that of the blank sample，which effectively alleviated the occurrence of corrosion. The response degradation of S-SNPs and its interaction with corrosion inhibitors resulted in a high load（16%）and pH response release of corrosion inhibitors. The S-SNPs could respond to pH changes caused by corrosion and had broad application prospects in the targeted repair of corrosion.

10.19346/j.cnki.1000-4092.2021.03.027