Adhesive complex coacervates and methods of making and using thereof
First Claim
1. An adhesive comprising a complex coacervate, wherein the complex coacervate comprises at least one synthetic polycation, at least one synthetic polyanion, and at least one multivalent cation, wherein the synthetic polycation and the synthetic polyanion each comprise at least one crosslinkable group covalently bonded to the synthetic polycation and the synthetic polyanion capable of covalently crosslinking with one another.
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Accused Products
Abstract
Described herein is the synthesis of adhesive complex coacervates. The adhesive complex coacervates are composed of a mixture of one or more polycations, one or more polyanions, and one of more multivalent cations. The polycations and polyanions in the adhesice complex coacervate are crosslinked with one another by covalent bonds upon curing. The adhesive complex coacervates have several desirable features when compared to conventional bioadhesives, which are effective in water-based applicatgions. The adhesive complex coacervates described herein exhibit good interfacial tension in water when applied to a substrate (i.e., they spread over the interface rather than being beaded up). Additionally, the ability of the complex coacervate to crosslink intermolecularly increases the cohesive strength of the adhesive complex coacervate. The adhesive complex coacervates have numerous biological applications as bioadhesives and drug delivery devices. In particular, the adhesive complex coacervates described herein are particularly useful in underwater applications and situations where water is present such as, for example, physiological conditions.
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Citations
46 Claims
- 1. An adhesive comprising a complex coacervate, wherein the complex coacervate comprises at least one synthetic polycation, at least one synthetic polyanion, and at least one multivalent cation, wherein the synthetic polycation and the synthetic polyanion each comprise at least one crosslinkable group covalently bonded to the synthetic polycation and the synthetic polyanion capable of covalently crosslinking with one another.
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24. An adhesive complex coacervate produced by the process comprising
(a) preparing a polyelectrolyte complex comprising admixing at least one synthetic polycation, at least one synthetic polyanion, and at least one multivalent cation, and the synthetic polycation and synthetic polyanion each comprise at least one group capable of covalently crosslinking with each other; - and
(b) adjusting the pH of the polyelectrolyte complex, the concentration of the at least one divalent cation, or a combination thereof to produce the adhesive complex coacervate. - View Dependent Claims (25, 26, 27, 28, 29)
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Specification