Designing Smart Microcapsules with Natural Polyelectrolytes to Improve Self-Healing Performance for Water-Based Polyurethane Coatings
文献类型：期刊论文
| 作者 | Li, Bowen1,3; Njuko, Demian3; Meng, Meijiang3; Tang, Ao3; Li, Ying2,3 |
| 刊名 | ACS APPLIED MATERIALS & INTERFACES
 |
| 出版日期 | 2022-11-15 |
| 页码 | 10 |
| 关键词 | ?-poly-L-lysine sodium alginate halloysite clay nanotubes smart microcapsule pH sensitive water-based polyurethane coating |
| ISSN号 | 1944-8244 |
| DOI | 10.1021/acsami.2c18339 |
| 通讯作者 | Tang, Ao(a.tang@imr.ac.cn) ; Li, Ying(liying@imr.ac.cn) |
| 英文摘要 | Active anticorrosive organic coatings adopting microcapsules (MCs) have lately attracted extensive attention as they were proven to be effective to minimize metal corrosions and offer a long-lasting protection performance. Herein, a novel environmental-friendly active corrosion protection system was designed for aluminum alloy 2024 (AA2024) based on water-based polyurethane coatings with the addition of water and alkaline pH responsive smart MCs, which is fabricated by utilizing 2mercaptobenzothiazole (2-MBT) as an inhibitor, halloysite clay nanotubes (HNTs) as an inhibitor carrier, and the natural polyelectrolytes epsilon-poly-L-lysine (epsilon-PLL) and sodium alginate (SA) as layer-by-layer (LBL) encapsulation polyelectrolytes. Salt spray tests and electrochemical measurements prove that the scratched coatings with embedded MCs possess an excellent self-healing performance by forming an adsorption layer of released 2MBT on the AA2024 surface, thereby providing over 90% inhibition efficiency within 6 days' immersion. The UV-vis spectrophotometer results further showed that the release of 2-MBT is a three-stage long-term process sensitive to water and alkaline pH value, while the outward release rate is both regulated by the solubility of 2-MBT and the SA layer. The fabricated MCs not only offer a great promise to provide an excellent self-healing performance but also shed light on the future design of advanced MCs on demand based on the LBL technique. |
| 资助项目 | National Natural Science Foundation of China ; [51871227] |
| WOS研究方向 | Science & Technology - Other Topics ; Materials Science |
| 语种 | 英语 |
| WOS记录号 | WOS:000886605000001 |
| 出版者 | AMER CHEMICAL SOC |
| 资助机构 | National Natural Science Foundation of China |
| 源URL | [http://ir.imr.ac.cn/handle/321006/176682]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Tang, Ao; Li, Ying |
| 作者单位 | 1.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 2.Northeastern Univ, Shenyang Natl Lab Mat Sci, Shenyang 110819, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Bowen,Njuko, Demian,Meng, Meijiang,et al. Designing Smart Microcapsules with Natural Polyelectrolytes to Improve Self-Healing Performance for Water-Based Polyurethane Coatings[J]. ACS APPLIED MATERIALS & INTERFACES,2022:10. |
| APA | Li, Bowen,Njuko, Demian,Meng, Meijiang,Tang, Ao,&Li, Ying.(2022).Designing Smart Microcapsules with Natural Polyelectrolytes to Improve Self-Healing Performance for Water-Based Polyurethane Coatings.ACS APPLIED MATERIALS & INTERFACES,10. |
| MLA | Li, Bowen,et al."Designing Smart Microcapsules with Natural Polyelectrolytes to Improve Self-Healing Performance for Water-Based Polyurethane Coatings".ACS APPLIED MATERIALS & INTERFACES (2022):10. |
入库方式： OAI收割
来源：金属研究所
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