PMID- 36379045
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20221130
IS  - 1944-8252 (Electronic)
IS  - 1944-8244 (Linking)
VI  - 14
IP  - 47
DP  - 2022 Nov 30
TI  - Designing Smart Microcapsules with Natural Polyelectrolytes to Improve 
      Self-Healing Performance for Water-Based Polyurethane Coatings.
PG  - 53370-53379
LID - 10.1021/acsami.2c18339 [doi]
AB  - 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 2-mercaptobenzothiazole (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 2-MBT 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.
FAU - Li, Bowen
AU  - Li B
AD  - Institute of Metal Research, Chinese Academy of Sciences, Wencui Road 62, 
      Shenyang110016, China.
AD  - School of Materials Science and Engineering, University of Science and Technology 
      of China, Wenhua Road 72, Shenyang110016, China.
FAU - Njuko, Demian
AU  - Njuko D
AD  - Institute of Metal Research, Chinese Academy of Sciences, Wencui Road 62, 
      Shenyang110016, China.
FAU - Meng, Meijiang
AU  - Meng M
AD  - Institute of Metal Research, Chinese Academy of Sciences, Wencui Road 62, 
      Shenyang110016, China.
FAU - Tang, Ao
AU  - Tang A
AUID- ORCID: 0000-0002-1126-3469
AD  - Institute of Metal Research, Chinese Academy of Sciences, Wencui Road 62, 
      Shenyang110016, China.
FAU - Li, Ying
AU  - Li Y
AD  - Institute of Metal Research, Chinese Academy of Sciences, Wencui Road 62, 
      Shenyang110016, China.
AD  - Shenyang National Laboratory for Materials Science, Northeastern University, No. 
      3-11 Wenhua Road, Shenyang110819, China.
LA  - eng
PT  - Journal Article
DEP - 20221115
PL  - United States
TA  - ACS Appl Mater Interfaces
JT  - ACS applied materials & interfaces
JID - 101504991
SB  - IM
OTO - NOTNLM
OT  - halloysite clay nanotubes
OT  - pH sensitive
OT  - smart microcapsule
OT  - sodium alginate
OT  - water-based polyurethane coating
OT  - epsilon-poly-l-lysine
EDAT- 2022/11/16 06:00
MHDA- 2022/11/16 06:01
CRDT- 2022/11/15 17:13
PHST- 2022/11/16 06:00 [pubmed]
PHST- 2022/11/16 06:01 [medline]
PHST- 2022/11/15 17:13 [entrez]
AID - 10.1021/acsami.2c18339 [doi]
PST - ppublish
SO  - ACS Appl Mater Interfaces. 2022 Nov 30;14(47):53370-53379. doi: 
      10.1021/acsami.2c18339. Epub 2022 Nov 15.