TY - JOUR
T1 - Full recovery of fracture toughness using a nontoxic solvent-based self-healing system
AU - Caruso, Mary M.
AU - Blaiszik, Benjamin J.
AU - White, Scott R.
AU - Sottos, Nancy R.
AU - Moore, Jeffrey S.
PY - 2008/7/9
Y1 - 2008/7/9
N2 - Two significant advances are reported for solvent-based self-healing of epoxy materials. First, an autonomic system yielding complete recovery of fracture toughness after crack propagation was achieved by embedding microcapsules containing a mixture of epoxy monomer and solvent into an epoxy matrix. Healing with epoxy-solvent microcapsules is superior to capsules that contain solvent alone, and multiple healing events are reported for this system. Second, efficient healing is reported for new solvents, including aromatic esters, which are significantly less toxic than the previously employed solvent, chlorobenzene. Preliminary aging studies using either chlorobenzene or ethyl phenylacetate as the solvent demonstrate the stability of the epoxy-solvent system under ambient conditions for at least one month.
AB - Two significant advances are reported for solvent-based self-healing of epoxy materials. First, an autonomic system yielding complete recovery of fracture toughness after crack propagation was achieved by embedding microcapsules containing a mixture of epoxy monomer and solvent into an epoxy matrix. Healing with epoxy-solvent microcapsules is superior to capsules that contain solvent alone, and multiple healing events are reported for this system. Second, efficient healing is reported for new solvents, including aromatic esters, which are significantly less toxic than the previously employed solvent, chlorobenzene. Preliminary aging studies using either chlorobenzene or ethyl phenylacetate as the solvent demonstrate the stability of the epoxy-solvent system under ambient conditions for at least one month.
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U2 - 10.1002/adfm.200800300
DO - 10.1002/adfm.200800300
M3 - Article
AN - SCOPUS:47949124465
SN - 1616-301X
VL - 18
SP - 1898
EP - 1904
JO - Advanced Functional Materials
JF - Advanced Functional Materials
IS - 13
ER -