Synthesis And Characterization Of Polyphenols Analogues Based Polyurethane

Mussels exhibit their strong adhesion to inorganic and organic materialthrough mussel adhesive proteins (MAPs), even includingpoly(tetrafluoroethylene)(PTFE) which has very low surface energy. Thecatechol group in DOPA plays a key role in the universal adhesion propertydue to its chemical versatility and diversity of affinity. However, despite theexcellent bonding properties of mussel mimetic materials containingdopamine, the application of this material is limited by its high cost. Due tothe structure of DOPA, We choose tannin as a replacement which are arelatively cheap natural source compounds with functional catechol groups.In this paper, two series of polyurethane containing tannin weresuccessfully prepared and further investigated. First one is a series ofPPG-polyurethane containing tannin, the TGA curves and UV-Vis spectrashowed that the content of tannin decreased with the introducing ratios ofPPG-PU; the results of UV-Vis analysis indicated the rapid binding reactionwith FeCl3, and the coordination modes strongly depend on different level ofFeCl3. The coating results showed that adding FeCl3can obviously improved the performance of PPG-PU, and all the samples with FeCl3presented anexcellent adhesion property and impact resistance. In a word, Functionalizedpolyurethane containing tannin has shown potential in applications in surfacechemistry and material engineering.The second is a series of PEG-polyurethane containing tannin, the CAand XPS results showed that PEG samples successfully attached to differentsubstrate through Immersion method. Based on AgNO3reductive reactions,the polyurethane containing Ag0were prepared respectively, the relationshipbetween the content of Ag0and time was observed, the results revealed thatthe content of Ag0continuously decreased of time. Moreover, theAntibacterial test of PEG samples exhibited excellent bacteriostaticproperties, manifesting its significant possibility to prepared antibacterialcoating.