The work signals a shift in plastics design toward circular materials that can be repeatedly reused without sacrificing performance, combining carbon capture with material design to address emissions and waste simultaneously.

Researchers at Colorado State University developed a catalytic process that directly combines carbon dioxide with strained bicyclic molecules to produce high-molecular-weight polyesters containing up to 50% CO2.

Scale-up demonstrations have moved beyond the lab, with plans to collaborate with industry partners through the BOTTLE Consortium to advance toward practical, industrial adoption.

Materials produced have tunable properties through varying starting bicyclic molecules, enabling designs from strong, heat-resistant plastics to soft, rubber-like materials while remaining compatible with standard manufacturing methods.

The approach uses energy-storing bicycloalkanes to drive CO2 insertion, enabling the formation of recyclable polyesters rather than conventional polycarbonates.

Practical implications include potential use in packaging, textiles, and engineering, with the broader goal of building a circular plastics economy and reducing fossil-fuel reliance.

The technology targets a closed-loop lifecycle where end-of-life plastics are deconstructed into original building blocks to create new material with the same properties, reducing demand for new raw materials.

The resulting plastics can be rigid or flexible, offer thermal and hydrolytic stability, and some variants can be chemically broken back into reusable starting materials at end of life, enabling a closed-loop system.