کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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820532 | 1469546 | 2013 | 6 صفحه PDF | دانلود رایگان |

A two part healing chemistry, stable to 150 °C, is incorporated in a woven glass/epoxy fiber-reinforced composite with a glass transition temperature (Tg) of 127 °C. The healing system is comprised of one type of microcapsules containing silanol end-functionalized polydimethylsiloxane, and a crosslinking agent, polydiethoxysilane, and a second type containing dibutyltin dilaurate catalyst in the solvent hexylacetate. The effects of microcapsule size and concentration on self-healing and mechanical properties including short beam strength, storage modulus and Tg were investigated. Self-healing of mechanical damage is assessed through the use of a pressure cell apparatus to detect nitrogen flow through a damaged composite. Complete self-healing was achieved when 42 μm diameter microcapsules at a loading of 9 vol.% or 25 μm microcapsules at a loading of 11 vol.% were added to the matrix.
Journal: Composites Science and Technology - Volume 79, 18 April 2013, Pages 15–20