Abstract
A microfluidic chip-like setup consisting of a vascular system of microchannels alternatingly filled with either a resin monomer or a curing agent is used to study the intrinsic physical healing mechanism in self-healing materials. It is observed that, as a prenotched crack propagates across the chip, the resin and curing agent are released from the damaged channels. Subsequently, both the resin and the curing agent wet the surrounding polydimethylsiloxane (PDMS) matrix and spread over the crack banks until the two blobs come in contact, mix, and polymerize through an organometallic cross-linking reaction. Moreover, the polymerized domains form a system of pillars, which span the crack banks on the opposite side. This "stitching" phenomenon prevents further propagation of the crack.
| Original language | English |
|---|---|
| Pages (from-to) | 17449-17455 |
| Number of pages | 7 |
| Journal | ACS Applied Materials and Interfaces |
| Volume | 9 |
| Issue number | 20 |
| DOIs | |
| Publication status | Published - 2017 May 24 |
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Keywords
- crack propagation
- cure
- microchannel
- resin
- self-healing
ASJC Scopus subject areas
- Materials Science(all)
Cite this
Release of Self-Healing Agents in a Material : What Happens Next? / Lee, Min Wook; Yoon, Suk Goo; Yarin, Alexander.
In: ACS Applied Materials and Interfaces, Vol. 9, No. 20, 24.05.2017, p. 17449-17455.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Release of Self-Healing Agents in a Material
T2 - What Happens Next?
AU - Lee, Min Wook
AU - Yoon, Suk Goo
AU - Yarin, Alexander
PY - 2017/5/24
Y1 - 2017/5/24
N2 - A microfluidic chip-like setup consisting of a vascular system of microchannels alternatingly filled with either a resin monomer or a curing agent is used to study the intrinsic physical healing mechanism in self-healing materials. It is observed that, as a prenotched crack propagates across the chip, the resin and curing agent are released from the damaged channels. Subsequently, both the resin and the curing agent wet the surrounding polydimethylsiloxane (PDMS) matrix and spread over the crack banks until the two blobs come in contact, mix, and polymerize through an organometallic cross-linking reaction. Moreover, the polymerized domains form a system of pillars, which span the crack banks on the opposite side. This "stitching" phenomenon prevents further propagation of the crack.
AB - A microfluidic chip-like setup consisting of a vascular system of microchannels alternatingly filled with either a resin monomer or a curing agent is used to study the intrinsic physical healing mechanism in self-healing materials. It is observed that, as a prenotched crack propagates across the chip, the resin and curing agent are released from the damaged channels. Subsequently, both the resin and the curing agent wet the surrounding polydimethylsiloxane (PDMS) matrix and spread over the crack banks until the two blobs come in contact, mix, and polymerize through an organometallic cross-linking reaction. Moreover, the polymerized domains form a system of pillars, which span the crack banks on the opposite side. This "stitching" phenomenon prevents further propagation of the crack.
KW - crack propagation
KW - cure
KW - microchannel
KW - resin
KW - self-healing
UR - http://www.scopus.com/inward/record.url?scp=85019905071&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85019905071&partnerID=8YFLogxK
U2 - 10.1021/acsami.7b03491
DO - 10.1021/acsami.7b03491
M3 - Article
VL - 9
SP - 17449
EP - 17455
JO - ACS applied materials & interfaces
JF - ACS applied materials & interfaces
SN - 1944-8244
IS - 20
ER -