Robust, Double-Walled Microcapsules for Self-Healing Polymeric Materials

被引：197

作者：

Caruso, Mary M. ^{[1
]}

Blaiszik, Benjamin J. ^{[2
]}

Jin, Henghua ^{[3
]}

Schelkopf, Stuart R. ^{[1
]}

Stradley, Dylan S. ^{[4
]}

Sottos, Nancy R. ^{[2
,4
,5
]}

White, Scott R. ^{[3
,4
,5
]}

Moore, Jeffrey S. ^{[1
,4
,5
]}

机构：

[1] Univ Illinois, Dept Chem, Urbana, IL 61801 USA

[2] Univ Illinois, Dept Mech Sci & Engn, Urbana, IL 61801 USA

[3] Univ Illinois, Dept Aerosp Engn, Urbana, IL 61801 USA

[4] Univ Illinois, Dept Mat Sci & Engn, Urbana, IL 61801 USA

[5] Univ Illinois, Beckman Inst, Urbana, IL 61801 USA

来源：

ACS APPLIED MATERIALS & INTERFACES | 2010年 / 2卷 / 04期

关键词：

microcapsules; self-healing; polyurethane; poly(urea-formaldehyde); thermal stability; MECHANICAL STRENGTH; EPOXY; MICROENCAPSULATION;

D O I：

10.1021/am100084k

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

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.

引用

页码：1195 / 1199

页数：5

共 29 条

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