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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 65: (Hydro)gels and Elastomers
CPP 65.4: Vortrag
Donnerstag, 19. März 2015, 10:15–10:30, PC 203
Biomimetic adhesives with self-healing properties — •Weina Wang1,2, Yisheng Xu1, Xuhong Guo1, and Regine von Klitzing2 — 1State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai, People's Republic of China — 2Physikalische Chemie, TU Berlin, Straße des 17. Juni 124, 10623 Berlin, Germany
Marine mussels live in the harsh seawater environment by attaching themselves onto any hard surface due to the functional unit, DOPA, in their adhesive proteins. To copy this adhesive property into synthetic material, Dopa was grafted onto poly(acrylicacid) (PAA) backbone.
In our work, the highest ratio of DOPA in mussel was mimicked into the biomimetic material PAA-DOPA. Taking advantage of a weak divalent ion, a tunable crosslinking method from reversible to irreversible was obtained. The crosslinked bioadhesive possesses water-endurable adhesion and self-healing properties by increasing pH value in sequence. The optimization of the cohesive and adhesive forces imparts the material with both hardness and adhesive properties. Besides, this adhesive is injectable and could be cured near body temperature effectively. Such properties make it the ideal candidate as wound sealant in tissue engineering process.