Adhesives are nonmetallic polymer materials which possess the ability to join together two independent surfaces by chemical and/or physical bonding. Despite the importance of adhesives on complexed and advanced applications, most of the existing adhesive products are single purpose, single material-based, and singular in function. The presentation will show studies of novel synthetic methods and structure-property relationships of multi-functional adhesives that exceeds conventional role of adhesives. The talk will discuss two topics of bioinspired adhesive that includes pendant catechol group: biomedical adhesives, and stimulus responsive adhesives. Biomedical adhesives are a rapidly growing field because of the potential applications in tissue adhesion, wound closure, hemostatic agents, wound dressing, and drug delivery. However, it is very hard to find a single chemical structure which possesses the multifunctionality required for biomedical adhesives (e.g., strong internal organ tissue adhesion and controlled drug delivery). The presentation will demonstrate 1) zwitterionic polymer-based adhesives that can provide liquid-tight sealing to prevent intestinal anastomosis leakage and 2) glucose-based adhesives which can form strong biological/tissue adhesion via non-toxic copper free click reaction. The first example of stimulus responsive adhesive is anthracene containing terpolymer that undergoes photo-mediated [4+4] cycloaddition. The photoreaction results in the crosslinking of individual polymer chains after interfacial adhesion between substrates and adhesive polymers. This external stimulus (photoirradiation) lead 10-fold improvement on adhesion property, and the adhesion strength can be conveniently controlled via the duration of UV irradiation. The second stimulus responsive adhesive possesses diacrylate crosslinker includes o-nitro benzyl groups that are cleavable under UV irradiation. The crosslinking bonds can be cleaved, freeing individual polymers and thereby weakening the cohesion. The weakened cohesion leads directly to reduce adhesion properties. The crosslinking can be systemically controlled to adjust the adhesion strength. This degradable adhesive can be usefully applied for temporary purposes, such as in the field of biomedical adhesives and industrial adhesives.<br/>

Synthesis of well-defined functional bioinspired adhesives polymers: Chemical functionalities and crosslinking effect on properties

Macromolecular Chemistry: The Second Century

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ACS Spring 2020 National Meeting & Expo

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.