Abstract
In this work, we developed novel self-healing anticorrosive hierarchical coatings that consist of several components. Namely, as a skeleton we prepared a core-shell nanofiber mat electrospun from emulsions of cure material (dimethyl methylhydrogen siloxane) in a poly(acrylonitrile) (PAN) solution in dimethylformamide. In these nanofibers, cure is in the core, while PAN is in the shell. The skeleton deposited on a protected surface is encased in an epoxy-based matrix, which contains emulsified liquid droplets of dimethylvinyl-terminated dimethylsiloxane resin monomer. When such hierarchical coatings are damaged, cure is released from the nanofiber cores and the resin monomer, released from the damaged matrix, is polymerized in the presence of cure. This polymerization and solidification process takes about 1-2 days and eventually heals the damaged material when solid poly(dimethylsiloxane) resin is formed. The self-healing effect was demonstrated using an electrochemical analogue of the scanning vibrating electrode technique. Damaged samples were left for 2 days. After that, the electric current through a damaged coating was found to be negligibly small for the samples with self-healing properties. On the other hand, for the samples without self-healing properties, the electric current was significant.
| Original language | English |
|---|---|
| Pages (from-to) | 10461-10468 |
| Number of pages | 8 |
| Journal | ACS Applied Materials and Interfaces |
| Volume | 6 |
| Issue number | 13 |
| DOIs | |
| Publication status | Published - 2014 Jul 9 |
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ASJC Scopus subject areas
- Materials Science(all)
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Hybrid self-healing matrix using core-shell nanofibers and capsuleless microdroplets. / Lee, Min Wook; An, Seongpil; Lee, Changmin; Liou, Minho; Yarin, Alexander; Yoon, Suk Goo.
In: ACS Applied Materials and Interfaces, Vol. 6, No. 13, 09.07.2014, p. 10461-10468.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Hybrid self-healing matrix using core-shell nanofibers and capsuleless microdroplets
AU - Lee, Min Wook
AU - An, Seongpil
AU - Lee, Changmin
AU - Liou, Minho
AU - Yarin, Alexander
AU - Yoon, Suk Goo
PY - 2014/7/9
Y1 - 2014/7/9
N2 - In this work, we developed novel self-healing anticorrosive hierarchical coatings that consist of several components. Namely, as a skeleton we prepared a core-shell nanofiber mat electrospun from emulsions of cure material (dimethyl methylhydrogen siloxane) in a poly(acrylonitrile) (PAN) solution in dimethylformamide. In these nanofibers, cure is in the core, while PAN is in the shell. The skeleton deposited on a protected surface is encased in an epoxy-based matrix, which contains emulsified liquid droplets of dimethylvinyl-terminated dimethylsiloxane resin monomer. When such hierarchical coatings are damaged, cure is released from the nanofiber cores and the resin monomer, released from the damaged matrix, is polymerized in the presence of cure. This polymerization and solidification process takes about 1-2 days and eventually heals the damaged material when solid poly(dimethylsiloxane) resin is formed. The self-healing effect was demonstrated using an electrochemical analogue of the scanning vibrating electrode technique. Damaged samples were left for 2 days. After that, the electric current through a damaged coating was found to be negligibly small for the samples with self-healing properties. On the other hand, for the samples without self-healing properties, the electric current was significant.
AB - In this work, we developed novel self-healing anticorrosive hierarchical coatings that consist of several components. Namely, as a skeleton we prepared a core-shell nanofiber mat electrospun from emulsions of cure material (dimethyl methylhydrogen siloxane) in a poly(acrylonitrile) (PAN) solution in dimethylformamide. In these nanofibers, cure is in the core, while PAN is in the shell. The skeleton deposited on a protected surface is encased in an epoxy-based matrix, which contains emulsified liquid droplets of dimethylvinyl-terminated dimethylsiloxane resin monomer. When such hierarchical coatings are damaged, cure is released from the nanofiber cores and the resin monomer, released from the damaged matrix, is polymerized in the presence of cure. This polymerization and solidification process takes about 1-2 days and eventually heals the damaged material when solid poly(dimethylsiloxane) resin is formed. The self-healing effect was demonstrated using an electrochemical analogue of the scanning vibrating electrode technique. Damaged samples were left for 2 days. After that, the electric current through a damaged coating was found to be negligibly small for the samples with self-healing properties. On the other hand, for the samples without self-healing properties, the electric current was significant.
KW - core-shell nanofibers
KW - electrospinning
KW - emulsions
KW - self-healing
UR - http://www.scopus.com/inward/record.url?scp=84904107058&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84904107058&partnerID=8YFLogxK
U2 - 10.1021/am5020293
DO - 10.1021/am5020293
M3 - Article
AN - SCOPUS:84904107058
VL - 6
SP - 10461
EP - 10468
JO - ACS applied materials & interfaces
JF - ACS applied materials & interfaces
SN - 1944-8244
IS - 13
ER -