Self-healing thermoset using encapsulated epoxy-amine healing chemistry

Henghua Jin; Chris L. Mangun; Dylan S. Stradley; Jeffrey S. Moore; Nancy R. Sottos; Scott R. White

doi:10.1016/j.polymer.2011.12.005

Self-healing thermoset using encapsulated epoxy-amine healing chemistry

Henghua Jin, Chris L. Mangun, Dylan S. Stradley, Jeffrey S. Moore, Nancy R. Sottos, Scott R. White

Research output: Contribution to journal › Article › peer-review

Abstract

Self-healing was achieved with a dual-microcapsule epoxy-amine chemistry in thermoset epoxy. One capsule contained a modified aliphatic polyamine (EPIKURE 3274) while the second capsule contained a diluted epoxy monomer (EPON 815C). Amine microcapsules were prepared by vacuum infiltration of EPIKURE 3274 into hollow polymeric microcapsules. Epoxy microcapsules were prepared by an in situ polymerization method. Both types of capsules were incorporated into an epoxy matrix (EPON 828:DETA) and recovery of mode-I fracture toughness was measured using tapered-double-cantilever-beam (TDCB) specimens. The optimal mass ratio of amine: epoxy capsules was 4: 6 and an average healing efficiency of 91% was achieved with 7 wt% amine capsules and 10.5 wt% epoxy capsules. Long-term stability of the healing system was demonstrated for six months at ambient conditions. Thermal stability was investigated by post curing samples at 121 °C and assessing healing performance.

Original language	English (US)
Pages (from-to)	581-587
Number of pages	7
Journal	Polymer
Volume	53
Issue number	2
DOIs	https://doi.org/10.1016/j.polymer.2011.12.005
State	Published - Jan 24 2012

Keywords

Amine microcapsule
Fracture toughness
Hollow microcapsule

ASJC Scopus subject areas

Organic Chemistry
Polymers and Plastics

Online availability

10.1016/j.polymer.2011.12.005

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title = "Self-healing thermoset using encapsulated epoxy-amine healing chemistry",

abstract = "Self-healing was achieved with a dual-microcapsule epoxy-amine chemistry in thermoset epoxy. One capsule contained a modified aliphatic polyamine (EPIKURE 3274) while the second capsule contained a diluted epoxy monomer (EPON 815C). Amine microcapsules were prepared by vacuum infiltration of EPIKURE 3274 into hollow polymeric microcapsules. Epoxy microcapsules were prepared by an in situ polymerization method. Both types of capsules were incorporated into an epoxy matrix (EPON 828:DETA) and recovery of mode-I fracture toughness was measured using tapered-double-cantilever-beam (TDCB) specimens. The optimal mass ratio of amine: epoxy capsules was 4: 6 and an average healing efficiency of 91% was achieved with 7 wt% amine capsules and 10.5 wt% epoxy capsules. Long-term stability of the healing system was demonstrated for six months at ambient conditions. Thermal stability was investigated by post curing samples at 121 °C and assessing healing performance.",

keywords = "Amine microcapsule, Fracture toughness, Hollow microcapsule",

author = "Henghua Jin and Mangun, {Chris L.} and Stradley, {Dylan S.} and Moore, {Jeffrey S.} and Sottos, {Nancy R.} and White, {Scott R.}",

note = "Funding Information: The authors gratefully acknowledge funding support from the U.S. Navy (STTR Contract No. N68335-10-C-0424 ) and U.S. Air Force Office of Scientific Research (AFOSR, Grant No. FA9550-10-1-0126 and Grant No. FA9550-05-1-0346 ). The authors also would like to greatly acknowledge Dr. Mary M. Caruso, Dr. Benjamin J. Blaiszik, Dr. Gerald O. Wilson and Dr. David A. McIlroy for technical help and discussion. Electron microscopy was performed in the Imaging Technology Group, Beckman Institute for Advanced Science and Technology at the University of Illinois, with the assistance of Scott Robinson. ",

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AU - White, Scott R.

N1 - Funding Information: The authors gratefully acknowledge funding support from the U.S. Navy (STTR Contract No. N68335-10-C-0424 ) and U.S. Air Force Office of Scientific Research (AFOSR, Grant No. FA9550-10-1-0126 and Grant No. FA9550-05-1-0346 ). The authors also would like to greatly acknowledge Dr. Mary M. Caruso, Dr. Benjamin J. Blaiszik, Dr. Gerald O. Wilson and Dr. David A. McIlroy for technical help and discussion. Electron microscopy was performed in the Imaging Technology Group, Beckman Institute for Advanced Science and Technology at the University of Illinois, with the assistance of Scott Robinson.

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N2 - Self-healing was achieved with a dual-microcapsule epoxy-amine chemistry in thermoset epoxy. One capsule contained a modified aliphatic polyamine (EPIKURE 3274) while the second capsule contained a diluted epoxy monomer (EPON 815C). Amine microcapsules were prepared by vacuum infiltration of EPIKURE 3274 into hollow polymeric microcapsules. Epoxy microcapsules were prepared by an in situ polymerization method. Both types of capsules were incorporated into an epoxy matrix (EPON 828:DETA) and recovery of mode-I fracture toughness was measured using tapered-double-cantilever-beam (TDCB) specimens. The optimal mass ratio of amine: epoxy capsules was 4: 6 and an average healing efficiency of 91% was achieved with 7 wt% amine capsules and 10.5 wt% epoxy capsules. Long-term stability of the healing system was demonstrated for six months at ambient conditions. Thermal stability was investigated by post curing samples at 121 °C and assessing healing performance.

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Self-healing thermoset using encapsulated epoxy-amine healing chemistry

Abstract

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