| 초록 |
The development of glue with underwater adhesive properties is a challenging issue in both biomedical and industrial fields. Despite some limitations, epoxy- and cyanoacrylate-based adhesives have been used in water. Among the various restrictions, the certain degree of biological toxicity of adhesives is the most important problem. Herein, we demonstrated the preparation of underwater adhesive by a simple mixture of polyvinyl alcohol (PVA) and tannic acid (TA). Using this adhesive, we can bond two stainless-steel objects (0.77 kg per each) stably. Notably, the toxicity evaluation using an invertebrate nematode (C. elegans) and a vertebrate goldfish results indicate that VATA is nontoxic towards animals for a short period (~ 168 h). We also successfully demonstrate using VATA in an acrylic pipe structure that presents no leakage between the inside and outside of the structure while underwater. |
