Robust, double-walled microcapsules for self-healing polymeric materials

Mary M. Caruso; Benjamin J. Blaiszik; Henghua Jin; Stuart R. Schelkopf; Dylan S. Stradley; Nancy R. Sottos; Scott R. White; Jeffrey S. Moore

doi:10.1021/am100084k

Robust, double-walled microcapsules for self-healing polymeric materials

Mary M. Caruso, Benjamin J. Blaiszik, Henghua Jin, Stuart R. Schelkopf, Dylan S. Stradley, Nancy R. Sottos, Scott R. White, Jeffrey S. Moore

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

Abstract

Double-walled polyurethane/poly(urea-formaldehyde) microcapsules (PU/UF) are prepared for use in self-healing materials. This modified encapsulation procedure combines two chemistries to form more robust capsule shell walls in a single operation. Robust capsules are formed by this procedure as long as the aromatic polyisocyanate prepolymer is soluble in the core liquid and the core liquid is compatible with isocyanates. Compared to a standard UF encapsulation, the modified procedure results in capsules with an increase in shell wall thickness from 200 to 675 nm as a function of the amount of PU added to the core liquid. Thermal stability of PU/UF microcapsules prepared with varying amounts of PU is compared to UF microcapsules. Mechanical properties of the PU/UF microcapsules are assessed from single-capsule compression testing.

Original language	English (US)
Pages (from-to)	1195-1199
Number of pages	5
Journal	ACS Applied Materials and Interfaces
Volume	2
Issue number	4
DOIs	https://doi.org/10.1021/am100084k
State	Published - Apr 28 2010

Keywords

Microcapsules
Poly(urea-formaldehyde)
Polyurethane
Self-healing
Thermal stability

ASJC Scopus subject areas

General Materials Science

Online availability

10.1021/am100084k

Library availability

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title = "Robust, double-walled microcapsules for self-healing polymeric materials",

abstract = "Double-walled polyurethane/poly(urea-formaldehyde) microcapsules (PU/UF) are prepared for use in self-healing materials. This modified encapsulation procedure combines two chemistries to form more robust capsule shell walls in a single operation. Robust capsules are formed by this procedure as long as the aromatic polyisocyanate prepolymer is soluble in the core liquid and the core liquid is compatible with isocyanates. Compared to a standard UF encapsulation, the modified procedure results in capsules with an increase in shell wall thickness from 200 to 675 nm as a function of the amount of PU added to the core liquid. Thermal stability of PU/UF microcapsules prepared with varying amounts of PU is compared to UF microcapsules. Mechanical properties of the PU/UF microcapsules are assessed from single-capsule compression testing.",

keywords = "Microcapsules, Poly(urea-formaldehyde), Polyurethane, Self-healing, Thermal stability",

author = "Caruso, {Mary M.} and Blaiszik, {Benjamin J.} and Henghua Jin and Schelkopf, {Stuart R.} and Stradley, {Dylan S.} and Sottos, {Nancy R.} and White, {Scott R.} and Moore, {Jeffrey S.}",

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AU - Caruso, Mary M.

AU - Blaiszik, Benjamin J.

AU - Jin, Henghua

AU - Schelkopf, Stuart R.

AU - Stradley, Dylan S.

AU - Sottos, Nancy R.

AU - White, Scott R.

AU - Moore, Jeffrey S.

PY - 2010/4/28

Y1 - 2010/4/28

N2 - Double-walled polyurethane/poly(urea-formaldehyde) microcapsules (PU/UF) are prepared for use in self-healing materials. This modified encapsulation procedure combines two chemistries to form more robust capsule shell walls in a single operation. Robust capsules are formed by this procedure as long as the aromatic polyisocyanate prepolymer is soluble in the core liquid and the core liquid is compatible with isocyanates. Compared to a standard UF encapsulation, the modified procedure results in capsules with an increase in shell wall thickness from 200 to 675 nm as a function of the amount of PU added to the core liquid. Thermal stability of PU/UF microcapsules prepared with varying amounts of PU is compared to UF microcapsules. Mechanical properties of the PU/UF microcapsules are assessed from single-capsule compression testing.

AB - Double-walled polyurethane/poly(urea-formaldehyde) microcapsules (PU/UF) are prepared for use in self-healing materials. This modified encapsulation procedure combines two chemistries to form more robust capsule shell walls in a single operation. Robust capsules are formed by this procedure as long as the aromatic polyisocyanate prepolymer is soluble in the core liquid and the core liquid is compatible with isocyanates. Compared to a standard UF encapsulation, the modified procedure results in capsules with an increase in shell wall thickness from 200 to 675 nm as a function of the amount of PU added to the core liquid. Thermal stability of PU/UF microcapsules prepared with varying amounts of PU is compared to UF microcapsules. Mechanical properties of the PU/UF microcapsules are assessed from single-capsule compression testing.

KW - Microcapsules

KW - Poly(urea-formaldehyde)

KW - Polyurethane

KW - Self-healing

KW - Thermal stability

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IS - 4

ER -

Robust, double-walled microcapsules for self-healing polymeric materials

Abstract

Keywords

ASJC Scopus subject areas

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