Self-healing materials with microvascular networks

被引：1194

作者：

Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, United States ^{[1
]}

不详 ^{[2
]}

不详 ^{[3
]}

不详 ^{[4
]}

不详 ^{[5
]}

机构：

[1] Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, Urbana

[2] Beckman Institute, University of Illinois at Urbana-Champaign, Urbana

[3] Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana

[4] Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana

[5] Department of Aerospace Engineering, University of Illinois at Urbana-Champaign, Urbana

来源：

Nat. Mater. | 2007年 / 8卷 / 581-585期

关键词：

Coatings - Crack initiation - Damage detection - Heat treatment;

D O I：

10.1038/nmat1934

中图分类号：

学科分类号：

摘要：

Self-healing polymers composed of microencapsulated healing agents exhibit remarkable mechanical performance and regenerative ability, but are limited to autonomic repair of a single damage event in a given location. Self-healing is triggered by crack-induced rupture of the embedded capsules; thus, once a localized region is depleted of healing agent, further repair is precluded. Re-mendable polymers can achieve multiple healing cycles, but require external intervention in the form of heat treatment and applied pressure. Here, we report a self-healing system capable of autonomously repairing repeated damage events. Our bio-inspired coating-substrate design delivers healing agent to cracks in a polymer coating via a three-dimensional microvascular network embedded in the substrate. Crack damage in the epoxy coating is healed repeatedly. This approach opens new avenues for continuous delivery of healing agents for self-repair as well as other active species for additionalfunctionality. © 2007 Nature Publishing Group.

引用

页码：581 / 585

页数：4

共 23 条

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