Sticky tape is very easy to attach somewhere, but sometimes it is very difficult to remove it from there. Researchers from MIT (USA) faced this problem when last year they developed a new surgical instrument - adhesive tape for fixation on internal organs. And now they figured out how to safely remove it after completing the main task.
Adhesive tape was developed as an alternative to sutures, so that you can simply glue the cut from the scalpel on the heart after surgery, patch up the intestines, and attach implants to the internal organs. The main difficulty is where to get glue that will work with wet surfaces that are constantly washed by liquids? The solution was to create a material from polyacrylic acid with the inclusion of esters.
The new material, as it absorbs moisture, creates soft hydrogen bonds with tissues, and ethers strengthen them. This worked even better than expected - after gluing, the tape could no longer be torn off without the risk of damaging living tissue. Therefore, scientists began looking for solutions that led them to the peptide glutathione, which is widely present in the human body. When included in the glue, the addition of regular baking soda breaks hydrogen bonds and makes it easy to peel off the bandage.
No matter how strong the original bond is, 5 minutes of processing is enough to break the old bonds and turn the glue into a gel. In case the adhesive layer is deeply embedded in living tissue, the new version has special slots and channels through which the solvent flows directly to it. The technology has already shown its effectiveness when working with the internal organs of pigs - kidneys, heart and intestines.