Indian researchers develop polymers that can self-heal
The team said that these polymers belong to the emerging class of vitrimers, characterised by their ability to be reshaped and reused without disposal, similar to the regenerative properties observed in human skin.
In an effort to combat the global plastic pollution crisis, researchers at Shiv Nadar University have pioneered an innovative solution – developing sustainable polymers derived from industrial waste.
Professor Bimlesh Lochab and Dr Sangeeta Sahu from the Department of Chemistry have introduced a novel category of waste-derived polymers with the ambitious aim of achieving carbon neutrality.
By harnessing elemental sulfur from petroleum refining industries and cardanol extracted from cashew nut industry waste as raw materials, these polymers offer a sustainable alternative to conventional petrochemical-based plastics.
The team said that these polymers belong to the emerging class of vitrimers, characterised by their ability to be reshaped and reused without disposal, similar to the regenerative properties observed in human skin.
Guided by the principles of green chemistry, the research team envisions a myriad of applications for these waste-derived polymers, ranging from flexible coatings to robust adhesives and flame-resistant materials for battery technology.
The hallmark attributes of the developed cardanol benzoxazine-sulfur polymer—Recycling, Reprocessing, Self-Healing, and Shape Recovery (R2S2)—underscore its versatility and transformative potential across diverse industries.
Notably, its rebondable adhesive properties, impressive load-bearing capacity, and shape recovery highlight the revolutionary impact these polymers could have in addressing sustainability challenges. "The material demonstrates excellent adhesion to metal surfaces, such as aluminium-aluminium, steel-steel, and aluminium-steel hybrid substrates, with remarkable strength," Dr Bimlesh Lochab said.
Upon application and subsequent use of the respective adhesive, these metal substrates are retrieved undamaged, minimizing waste and enhancing reuse potential.
