Periodic Bicontinuous Composites for High Specific Energy Absorption

被引：105

作者：

Lee, Jae-Hwang ^{[1
,3
,4
]}

Wang, Lifeng ^{[2
,3
,5
]}

Boyce, Mary C. ^{[2
,3
]}

Thomas, Edwin L. ^{[1
,3
,4
]}

机构：

[1] MIT, Dept Mat Sci & Engn, Cambridge, MA 02139 USA

[2] MIT, Dept Mech Engn, Cambridge, MA 02139 USA

[3] MIT, Inst Solider Nanotechnol, Cambridge, MA 02139 USA

[4] Rice Univ, Dept Mech Engn & Mat Sci, Houston, TX 77005 USA

[5] Clarkson Univ, Dept Civil & Environm Engn, Potsdam, NY 13699 USA

来源：

NANO LETTERS | 2012年 / 12卷 / 08期

关键词：

Interpenetrating phase composite; interference lithography; protection; mechanical metamaterial; periodic frame; CARBON-NANOTUBE; DISSIPATION; NANOSCALE; MECHANISMS; NACRE; ARMOR; EPOXY;

D O I：

10.1021/nl302234f

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We report on the mechanical behavior of an interpenetrating carbon/epoxy periodic submicrometer-scale bicontinuous composite material fabricated following the design principles deduced from biological composites. Using microscopic uniaxial compressive tests, the specific energy absorption is quantitatively evaluated and compared with the epoxy/air and carbon/air precursors. The carbon/epoxy material demonstrates extremely high specific energy absorption up to 720 kJ/kg and shear-dominant interphase interactions from the interlocked hard (carbon) and soft (epoxy) phases. Such bicontinuous nanocomposites are a new type of structural metamaterial with designed cell topology and mechanical anisotropy. Their inherent small length scale can play a critical role in prohibiting segregated mechanical responses leading to flaw tolerance.

引用

页码：4392 / 4396

页数：5

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