Porous polymer cages enable enzyme reactions above 100°C
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Researchers at Bielefeld University have developed a porous organic polymer that encapsulates lipase enzymes, protecting them from denaturation at temperatures above 100°C. The method enables efficient, solvent-free chemical reactions with high-melting solids, expanding enzymatic manufacturing beyond the boiling point of water.
The Encapsulation Method
The polymer forms a protective molecular cage around the lipase, preventing the protein from unfolding under heat. In experiments, the encapsulated enzyme catalyzed esterification reactions at and above 100°C, using molten substrates without organic solvents. The catalyst remained active over multiple cycles, demonstrating recyclability.
Industrial Implications
The approach eliminates the need for organic solvents, reducing waste and energy costs. The ester products are relevant for sectors such as cosmetics, where high-purity esters are used. Corresponding author Harald Gröger noted that the method enables 'efficient, waste-minimized and economical synthesis' for industrial applications.
What's Next
The team plans to test the encapsulation technique with other enzyme classes and industrial substrates. It remains unclear whether the polymer can protect enzymes at even higher temperatures or in continuous flow reactors.
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Porous polymer cages enable enzyme reactions above 100°C
