Mr. Sticky's Underwater Glue

Product Information

Due to the hydrophilic nature of polymers and the presence of highly swollen networks in hydrogels, 21 it is difficult to obtain strong adhesion properties of hydrogels underwater. Junjie Ding is an undergraduate student of Grade 1, and she is currently pursuing her bachelor degree in Polymer Material and Engineering at Ludong University. Changing the number of different intermolecular force species can affect the mechanical properties of hydrogels. This is due to the fact that the non-covalent interactions at the interface are greatly weakened by the formation of a hydrated layer.

Underwater Glue, the real one - Profi-Glue Underwater Glue, the real one - Profi-Glue

They prepared a mussel PU prepolymer consisting of isocyanate-terminated polypropylene glycol (PPG) and isocyanate-terminated dopamine bis(hydroxymethyl)propane (DBHP). The adhesive may take 24 to 48 hours to fully cure, so temporary supports may be needed to hold the items in place during this time. In addition, existing polymer adhesives are subject to water attack in water and can swell to failure. That's better than most existing experimental and commercial adhesives, and only slightly lower than the strongest underwater adhesive at 2.Metal cations can be introduced into the hydrogel to coordinate with the hydrogel network to enhance cohesion.

Scientists make powerful underwater glue inspired by Scientists make powerful underwater glue inspired by

using hydrophilic acrylamide and hydrophobic stearic methacrylate (C 18), sodium dodecyl sulfate (SDS) and Fe 3+, prepared an underwater adhesion hydrogel with self-regulating function to different substrate surfaces. designed an underwater adhesion hydrogel that was functionalized by anthracene-based polyethyleneimine with water-absorbing polyethyleneimine (PEI) as the polymer backbone, which could promote the absorption of interfacial water molecules and allow the hydrogel to adhere strongly to the adherend. In nature, many organisms are able to adapt to complex water environments by developing micro/nanostructures with unique functions, for example, the setae of gecko feet, the foot pads of tree frogs, the hexagonal microstructures of clingfish, etc.

The accompanying image clearly demonstrates that while the competitor’s clear product has turned white, Adiseal has retained its clarity and transparency even when submerged underwater for over 16 days. C) PEGDA/TA hydrogels constructed by reversible cross-linking of tannic acid introduced in the covalent network.

underwater glue based on photo- and thermo A reversible underwater glue based on photo- and thermo

found that copolymers with adjacent cation–aromatic sequences can be synthesized by cation–π complex-assisted radical polymerization, and produce strong and reversible adhesion to negatively charged surfaces in seawater. A) The microporous structure of the inner surface of snails giving them a strong adhesion to human tissues.Coordination bonds are a type of covalent bond between hydrogels and metals or metal oxides to achieve underwater adhesion.

underwater adhesion on diverse substrates using Ultrastrong underwater adhesion on diverse substrates using

This fast and strong underwater curing property is superior to the bonding properties of many other reported mussel-inspired adhesives. After the hydrogel adheres to the adherend underwater, the adhesion strength can be tested using a universal testing machine in a dry environment. Therefore, the catechol moiety of DOPA has been an inspiration for designing underwater adhesion hydrogels.By applying a certain external force, the sensor is bonded to the adherend fixed underwater, after which the sensor is retracted until the hydrogel and the adherend are completely detached. In contrast, sol-type hydrogels, as a liquid underwater adhesive, have strong underwater adhesion due to good fluidity and interfacial contact.