Catechol-Containing Additive with High Adhesion for Silicon Adhesives
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초록
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Inspired by the ability of shellfish to attach to rocks in water, the use of catecholic moieties is a widely used strategy for adhesives. The most significant feature of catechol is the two hydroxy groups that enables adhesion even under wet or moist conditions. Dopamine is a common compound used to introduce catechol in such applications, however the instability of dopamine restricts reliable usage. Eugenol is another sought after compound, however the problem of demethylation is a hinderance. In this study, we design catechol-based adhesion additives through the protection and deprotection of the catechol moiety, that utilizes the two hydroxy groups for adhesion. Three approaches were made using catechols: using deprotected catechols as primers that can attach to surfaces, catechols attached with silane groups via thiol-ene click, and catechol groups functionalized on silica nanoparticles. Improvement of adhesion were tested by measuring the mechanical properties.