Ma, Yanqi, Huang, Haowei, Zhou, Hongda, Graham, Michael, Smith, James, Sheng, Xinxin, Chen, Ying, Zhang, Li, Zhang, Xinya, Shchukina, Elena 
ORCID: 0000-0002-1844-9266 et al (show 1 more authors)
(2021)
Superior anti-corrosion and self-healing bi-functional polymer composite coatings with polydopamine modified mesoporous silica/graphene oxide.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY, 95.
pp. 95-104.
|
Text
Superior_author_version.pdf - Author Accepted Manuscript Download (1MB) | Preview |
Abstract
In this article, graphene oxide (GO) and benzotriazole-loaded mesoporous silica nanoparticles (BTA/MSNs) are combined on micro scale through the in situ polymerization of polydopamine (PDA), preparing a self-healing bi-functional GO (fGO) used as nano-fillers for anti-corrosion enhancement of waterborne epoxy (WEP) coatings. Scanning electronic microscopy (SEM) images show that the BTA/MSNs are uniformly distributed on the surface of high aspect ratio GO nanosheets to endow GO nanocontainer characteristics. UV-vis profiles demonstrate that fGO has pH-controlled release function. Modulus at lowest frequency is generally used for comparing the corrosion resistance of organic coatings. Modulus at lowest frequency (1.42 × 107 Ω•cm2) after 30 days immersion in 3.5 wt.% NaCl solution revealed 2 orders of magnitude higher that of blank WEP (1.17 × 105 Ω•cm2). With artificial cracks on its coatings, fGO/WEP had no obvious rust compared with blank WEP after 240 hrs of immersion. We anticipate that self-healing and physical barrier bi-functional nanocontainers improve the traditional anticorrosion coating efficiency with better, longer-lasting performance for shipping, oil drilling or bridge maintenance.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | Mesoporous silica, Graphene oxide, Anti-corrosion, Self-healing, Functional composite coatings |
| Divisions: | Faculty of Science and Engineering > School of Physical Sciences |
| Depositing User: | Symplectic Admin |
| Date Deposited: | 05 Sep 2022 07:37 |
| Last Modified: | 18 Jan 2023 22:35 |
| DOI: | 10.1016/j.jmst.2021.04.019 |
| Related URLs: | |
| URI: | https://livrepository.liverpool.ac.uk/id/eprint/3126097 |
Dimensions
Dimensions
