Polyphosphoester/Tannic Acid Composite Sticky Coacervates as Adhesives

Abstract To obtain adhesive coacervates with biodegradable polymers, sticky coacervates composed of water soluble polyphosphoester (PPE) and tannic acid (TA) were prepared. According to the multiple hydrogen bonding acceptor sites in the repeating unit of PPE, a coacervate can spontaneously form by mixing PPE with TA in aqueous media. The coacervate could work as an adhesive for titanium plates. Furthermore, an average maximum shear bond strength of 1.6 MPa was observed.