Debondable, Recyclable and/or Biodegradable Naturally‐Based Adhesives

Debond-on-demand adhesives are of growing interest, due to their many advantages – from economic to environmental ones. Several approaches have been demonstrated to obtain this property – from more classic ones (pressure-sensitive adhesives, photodegradable adhesives, biodegradable adhesives, etc.) to more advanced ones (electrically sensitive adhesives, reversible covalent bonds containing adhesives, etc.). With the growing awareness of polymers’ environmental impact, several studies have been conducted in the field of Biobased polymers. This trend is also implemented in the field of debondable adhesives by two main approaches – biodegradable adhesives (from polysaccharides like starch, through oils like epoxidized castor oil, to protein derivatives-based adhesives) and Biobased reversible covalent bonds containing polymers (RCBPs)-based adhesives, like those obtained from reacting an epoxidized soybean oil with natural carboxylic acids. The RCBPs debond-ability is far more efficient, as, unlike biodegradable adhesives, these can re-bond after the debonding process is finished.