Autonomic Healing of Carbon Fiber/Epoxy Interfaces

被引：65
作者：
Jones, Amanda R. [1 ]
Cintora, Alicia [2 ]
White, Scott R. [3 ,4 ]
Sottos, Nancy R. [2 ]
机构：
[1] Univ Illinois, Dept Mech Sci & Engn, Urbana, IL 61801 USA
[2] Univ Illinois, Dept Mat Sci & Engn, Urbana, IL 61801 USA
[3] Univ Illinois, Dept Aerosp Engn, Urbana, IL 61801 USA
[4] Univ Illinois, Beckman Inst Sci & Technol, Urbana, IL 61801 USA
来源：
ACS APPLIED MATERIALS & INTERFACES | 2014年 / 6卷 / 09期
关键词：
self-healing; polymer matrix composite (PMC); fiber/matrix bond; capsule; FRAGMENTATION TEST; FIBER PUSHOUT; COMPOSITE; POLYMER; STRENGTH; DAMAGE; MICROCAPSULES; MECHANICS; RECOVERY; FRACTURE;
D O I：
10.1021/am500536t
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
A maximum of 91% recovery of interfacial shear strength (IFSS) is achieved for carbon fiber/epoxy interfaces functionalized with capsules containing reactive epoxy resin and ethyl phenyl acetate (EPA). We find a binder is necessary to improve the retention of capsules on the carbon fiber surface. Two different methods for applying the binder to the carbon fiber surface are investigated. Healing efficiency is assessed by recovery of IFSS of a single fimctionalized fiber embedded in a microdroplet of epoxy. Debonding of the fiber/matrix interface ruptures the capsules, releasing resin and EPA solvent into the crack plane. The solvent swells the matrix, initiating transport of residual amine functionality from the matrix for further curing with the epoxy resin delivered to the crack plane. The two binder protocols produce comparable results, both yielding higher recovery of IFSS than samples prepared without a binder.
引用
收藏
页码：6033 / 6039
页数：7
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