Modern integrated microelectronic devices are often poorly repairable and difficult to recycle. Debondable adhesives play a key role in the transition to a circular economy with sustainable resources, less waste, and intelligent repair/recycling strategies.
A research team has now introduced a method for making adhesives that can be deactivated 'on command'.
Their inspiration came from the masters of underwater adhesion: mussels. Mussel-inspired adhesives have been developed before. These new versions are based on thiol-catechol polyaddition, which forms polymers with adhesive thiol-catechol connectivities . The trick is that when the catechol groups in the adhesive polymers are oxidized to quinones , the strength of adhesion decreases dramatically.
Biobased, peptidic biscatechol precursors of DiDOPA, which is similarly found in mussels, were compared with their fossil-based analog. Both adhesives also function under water and are insensitive to atmospheric oxygen and weak oxidizing agents. However, they lose their stickiness through oxidation with the strongly oxidizing sodium periodate of the fossil-based adhesive lies in the compensation, as hydrophobic polymers are also very good adhesives.
A new commentary paper puts forth a transformative solution to the unsustainable reliance on fossil resources by the chemical industry: catalysis to leverage sustainable waste resources, ushering the ...
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