Lipase incorporated ionic liquid polymers as active, stable and reusable biocatalysts

Area of Science:

• Biomaterials Science
• Polymer Chemistry
• Enzyme Engineering

Background:

• Enzymes are crucial biocatalysts but often lack stability and reusability in industrial applications.
• Ionic liquids (ILs) offer tunable properties as solvents and monomers for advanced material development.
• Developing robust enzyme immobilization techniques is key to enhancing biocatalyst performance.

Purpose of the Study:

• To create novel ionic liquid (IL) polymer materials incorporating enzymes.
• To evaluate the activity, stability, and reusability of these enzyme-loaded IL polymer biocatalysts.
• To explore the potential of IL-based polymers for biomolecule encapsulation and diverse applications.

Main Methods:

• Microencapsulation of Candida rugosa lipase within surfactant aggregates in an ionic liquid monomer.
• Incorporation of enzyme-loaded aggregates into polymer frameworks via free radical polymerization of a specific IL monomer ([veim][Tf(2)N]).
• Evaluation of biocatalyst performance using the hydrolysis of p-nitrophenyl butyrate (p-PNB) as a model reaction.

Main Results:

• The developed ionic liquid polymer materials successfully encapsulated active lipase.
• The enzyme-polymer biocatalysts exhibited high activity and excellent stability in aqueous solutions.
• Materials retained over 80% of their activity after five reaction cycles, with simple recovery via centrifugation.

Conclusions:

• Ionic liquid polymer materials provide a stable and reusable platform for enzyme immobilization.
• This approach combines polymer and supramolecular chemistry for designing advanced biomaterials.
• The developed biocatalysts show promise for diverse applications requiring stable and recyclable enzymes.