Double Stimuli-Responsive Conducting Polypyrrole Nanocapsules for Corrosion-Resistant Epoxy Coatings
Source abstract
Abstract
Stimuli-responsive nanocapsules, which can respond to various environmental stimuli and release their encapsulated payload on demand, have attracted wide interest in different fields in recent years. In this work, a novel kind of polypyrrole (PPy) nanocapsules is fabricated and loaded with zinc salt corrosion inhibitors. The synthesized PPy nanocapsules respond to two different external stimuli (pH- and redox-responsive) and can control the release of their encapsulated corrosion inhibitors. The nanocapsules can detect the micro-environmental pH or surface-potential changes associated with the corrosion initiation of the metal substrate. When introduced into a protective epoxy coating, the fabricated PPy nanocapsules inhibit the anodic and cathodic corrosion reactions. The superior corrosion resistance and active corrosion protection effects of the epoxy-PPy-Zn coatings are further demonstrated via electrochemical and long-term immersion tests. The low-frequency impedance, coating resistance, and oxide film resistance increase after about 400 h of exposure in a 3.5 wt % NaCl solution, reflecting the enhanced corrosion protection properties and excellent repairing performance of the coating. Furthermore, the epoxy-PPy-Zn coating can avoid the pitting corrosion of 304 stainless steel. Overall, we have fabricated double stimuli-responsive PPy nanocapsules via a simple and effective strategy and incorporated them into a corrosion-resistant epoxy coating for protecting Fe-based metal substrates.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Corrosion Behavior and Inhibition · Conducting polymers and applications · Polymer composites and self-healing
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing211816, China
Institute of Surface Science, Helmholtz-Zentrum hereon GmbH (Hereon), Geesthacht21502, Germany
Faculty of Engineering, Kiel University, Kiel24143, Germany
School of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing211816, China
National Engineering Technique Research Center for Biotechnology, Nanjing211816, China
Funding
Ministry of Science and Technology of the People's Republic of China · China Scholarship Council
References (52)
Show source-provided references
1. 10.1021/acs.iecr.9b0574310.1021/acs.iecr.9b05743 ↗
2. 10.1016/j.cej.2019.12374210.1016/j.cej.2019.123742 ↗
3. 10.1016/j.corsci.2017.10.00910.1016/j.corsci.2017.10.009 ↗
4. 10.1016/j.corsci.2017.08.03010.1016/j.corsci.2017.08.030 ↗
5. 10.1016/j.porgcoat.2017.10.01510.1016/j.porgcoat.2017.10.015 ↗
6. 10.1016/j.cej.2016.03.05510.1016/j.cej.2016.03.055 ↗
7. 10.1016/j.corsci.2019.10812810.1016/j.corsci.2019.108128 ↗
8. 10.1002/smll.20070006410.1002/smll.200700064 ↗
9. 10.1021/cm062066k10.1021/cm062066k ↗
10. 10.1039/C5TA00417A10.1039/C5TA00417A ↗
11. 10.1021/acsami.8b0577510.1021/acsami.8b05775 ↗
12. 10.1016/j.cej.2020.12711810.1016/j.cej.2020.127118 ↗
13. 10.1002/adma.20130298910.1002/adma.201302989 ↗
14. 10.1016/j.corsci.2018.12.01210.1016/j.corsci.2018.12.012 ↗
15. 10.1016/j.electacta.2018.12.06210.1016/j.electacta.2018.12.062 ↗
16. 10.1038/3505723210.1038/35057232 ↗
17. 10.1016/j.cej.2015.07.08710.1016/j.cej.2015.07.087 ↗
18. 10.1016/j.corsci.2017.11.01010.1016/j.corsci.2017.11.010 ↗
19. 10.1016/j.ceramint.2019.02.11110.1016/j.ceramint.2019.02.111 ↗
20. 10.1021/acsami.0c0237810.1021/acsami.0c02378 ↗
21. 10.1016/j.corsci.2020.10854810.1016/j.corsci.2020.108548 ↗
22. 10.1016/j.micromeso.2017.07.03510.1016/j.micromeso.2017.07.035 ↗
23. 10.1021/cm500923d10.1021/cm500923d ↗
24. 10.1016/j.matchemphys.2011.07.05210.1016/j.matchemphys.2011.07.052 ↗
25. 10.1039/C9RA00800D10.1039/C9RA00800D ↗
26. 10.1021/nn203430m10.1021/nn203430m ↗
27. 10.1016/j.cej.2019.12338910.1016/j.cej.2019.123389 ↗
28. 10.1016/j.compositesb.2021.10871310.1016/j.compositesb.2021.108713 ↗
29. 10.1016/j.memsci.2020.11796810.1016/j.memsci.2020.117968 ↗
30. 10.1016/S0379-6779(03)00193-010.1016/S0379-6779(03)00193-0 ↗
31. 10.1016/j.porgcoat.2017.10.00810.1016/j.porgcoat.2017.10.008 ↗
32. 10.1016/j.synthmet.2017.10.00310.1016/j.synthmet.2017.10.003 ↗
33. 10.1016/j.jcis.2006.05.03810.1016/j.jcis.2006.05.038 ↗
34. 10.1016/j.carbpol.2016.03.03910.1016/j.carbpol.2016.03.039 ↗
35. 10.1016/j.surfcoat.2016.02.00710.1016/j.surfcoat.2016.02.007 ↗
36. 10.1016/j.corsci.2012.04.01310.1016/j.corsci.2012.04.013 ↗
37. 10.1016/j.corsci.2013.01.00610.1016/j.corsci.2013.01.006 ↗
38. 10.1016/j.corsci.2016.07.00310.1016/j.corsci.2016.07.003 ↗
39. 10.1016/S0928-0987(01)00095-110.1016/S0928-0987(01)00095-1 ↗
40. 10.1016/0168-3659(87)90035-610.1016/0168-3659(87)90035-6 ↗
41. 10.1016/0168-3659(87)90034-410.1016/0168-3659(87)90034-4 ↗
42. 10.1021/ja200297j10.1021/ja200297j ↗
43. 10.1021/la901169p10.1021/la901169p ↗
44. 10.1021/ja405279t10.1021/ja405279t ↗
45. 10.1016/j.cej.2021.13347610.1016/j.cej.2021.133476 ↗
46. 10.1016/j.corsci.2005.11.00110.1016/j.corsci.2005.11.001 ↗
47. 10.1016/S0013-4686(02)00077-410.1016/S0013-4686(02)00077-4 ↗
48. Wallinder D. · Corros. Sci. · 1999 · 4 · 275
49. 10.1016/j.cej.2019.12363010.1016/j.cej.2019.123630 ↗
50. 10.1016/j.corsci.2019.03.04510.1016/j.corsci.2019.03.045 ↗
51. 10.3390/polym1407135610.3390/polym14071356 ↗
52. 10.1016/j.apsusc.2017.07.07710.1016/j.apsusc.2017.07.077 ↗