Proceedings of MATSUS Spring 2024 Conference (MATSUS24)
DOI: https://doi.org/10.29363/nanoge.matsus.2024.326
Publication date: 18th December 2023
We demonstrate electroadhesion, i.e., adhesion induced by an electric field, between cationic hydrogels and animal tissues [1, 2]. When gel and tissue are placed under an electric field (DC, 10 V) for 20 s, the pair strongly adhere, and the adhesion persists indefinitely thereafter. Applying the DC field with reversed polarity reverses the adhesion. Electroadhesion works with tissues of many mammals (cow, pig, chicken, and mouse), and is especially strong in the case of the aorta, cornea, lung, and cartilage. Only cationic gels can be electroadhered to tissues, which suggests that the tissues have anionic character.
We then show the use of electroadhesion to seal cuts or tears in tissues or model anionic gels. Electroadhered gel-patches provide a robust seal over openings in bovine aorta. Moreover, a gel sleeve is able to rejoin pieces of a severed tube (this is the equivalent of a surgery called an anastomosis). These studies raise the possibility of using electroadhesion in surgery while obviating the need for sutures or staples [1, 2]. Advantages include the ability to achieve adhesion on-command, and moreover the ability to reverse this adhesion in case of error.
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