Self-Healing Plastic: Molecular Magnets Create “Impossible” Material

Researchers at Wageningen University (Netherlands), led by Professor Jasper van der Gucht, have developed a fundamentally new type of material – a compleximer. Its uniqueness lies in the combination of properties that were previously considered mutually exclusive: it has the impact strength of quality plastic, but at the same time it can be blown and molded as easily as ordinary glass.

For decades, the rule of thumb in science was that the slower a material melts and the easier it is to process, the more fragile it will ultimately be. Scientists were able to disprove this by changing the principle of communication at the molecular level. Instead of traditional chemical bonds, the compleximer is held together by physical attraction: half of each molecular chain has a positive charge, and the other half a negative charge. Molecules stick together like magnets.

Thanks to this structure, there is more free space between the molecules. This allows the material to maintain incredible strength: when dropped, a compleximer product simply bounces off the ground without breaking. In addition, the material has the ability to self-heal: if a crack occurs in it, it is enough to heat the damaged area (for example, with a regular hairdryer) and press it – the molecular bonds will be instantly restored.

In the near future, the developers plan to create an environmentally friendly version of the compleximer, which will not only be easy to repair, but also quickly decompose in the natural environment – this could solve the global problem of plastic pollution.