Surface modified materials for active capture of enzymes.

Area of Science:

• Materials Science
• Biochemistry
• Surface Chemistry

Background:

• Protein immobilization is crucial for biocatalysis and diagnostics.
• Existing methods often require harsh conditions or additional coupling agents.
• Developing mild and efficient immobilization strategies is essential.

Purpose of the Study:

• To develop a novel carbene-mediated surface modification for direct protein immobilization.
• To evaluate the performance of modified glass fiber membranes for enzyme capture and activity.
• To compare different support materials for enzyme immobilization.

Main Methods:

• Surface modification of glass fiber membranes with bis(diarylcarbene)s.
• Immobilization of cellulase via diazonium coupling.
• Characterization using XPS, ATR-IR, and fluorescence spectroscopy.
• Evaluation of enzyme loading, activity, and reusability across various support materials.

Main Results:

• Successful covalent attachment of cellulase demonstrated by spectroscopic analysis.
• Glass fiber membranes exhibited the highest enzyme loading (∼23 mg/g) and retained >90% activity after 6 cycles.
• Carbene modification provides a mild and effective strategy for enzyme immobilization.

Conclusions:

• Carbene surface modification is a viable strategy for mild protein immobilization.
• Glass fiber membranes serve as a novel and effective support for enzyme immobilization.
• This approach offers a promising platform for reusable biocatalytic systems.