材料科学
复合材料
复合数
自愈
断裂韧性
聚合物
骨愈合
环氧树脂
自愈材料
聚合
分层(地质)
相(物质)
断裂力学
韧性
外科
化学
病理
古生物学
生物
有机化学
构造学
替代医学
医学
俯冲
作者
Michael R. Kessler,Nancy R. Sottos,Scott R. White
标识
DOI:10.1016/s1359-835x(03)00138-6
摘要
A self-healing fiber-reinforced structural polymer matrix composite material is demonstrated. In the composite, a microencapsulated healing agent and a solid chemical catalyst are dispersed within the polymer matrix phase. Healing is triggered by crack propagation through the microcapsules, which then release the healing agent into the crack plane. Subsequent exposure of the healing agent to the chemical catalyst initiates polymerization and bonding of the crack faces. Self-healing (autonomic healing) is demonstrated on width-tapered double cantilever beam fracture specimens in which a mid-plane delamination is introduced and then allowed to heal. Autonomic healing at room temperature yields as much as 45% recovery of virgin interlaminar fracture toughness, while healing at 80 °C increases the recovery to over 80%. The in situ kinetics of healing in structural composites is investigated in comparison to that of neat epoxy resin.
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