Honors Capstone Project
Date of Submission
Patrick T. Mather
George C. Martin
Biomedical and Chemical Engineering
Engineering and Computer Science
Capstone Prize Winner
Won Capstone Funding
Sciences and Engineering
Biochemical and Biomolecular Engineering | Chemical Engineering
In this report, we summarize the results of research related to development of an electrically-triggered reversible-adhesive material. The material is made of an epoxy comprised of diglcidyl ether of bisphenol-A (DGEBA) and 4,4’-diaminodiphenylsulfone (DDS). By combining the epoxy with PCL a “bricks and mortar” morphology is created with reversible adhesion properties. A phenomenon known as differential expansive bleeding (DEB) is the driving force of the self-healing and reversible-adhesion. The epoxy/PCL was embedded within electrically conductive carbon nanofibers (CNF) created from electrospun poly(acrylonitrile) (PAN). The material’s high conductivity allowed convenient heating with a power source. Initial tests revealed a lack of adhesion development, counter to our expectation. After the tests failed to create adhesion, the morphology of the sample was scrutinized. Experiments showed that the morphology of the epoxy/PCL within the fibers is distinct from the morphology in the bulk phase. Correlated with this microstructural difference was a lack of DEB, despite epoxy/PCL phase separation. It is argued that this lack of DEB is related to the much finer scale of phase separation, kinetically hampering PCL flow.
Levy, Lawrence Matthew, "Epoxy/PCL/CNF Nanocomposite Towards Electrically Triggered Self-Healing and Reversible Adhesion" (2011). Syracuse University Honors Program Capstone Projects. 245.
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