Related Experiment Video
Updated: Apr 19, 2026
15:06
Synthesis of an Intein-mediated Artificial Protein Hydrogel
Published on: January 27, 2014
12.8K
A mild strategy to encapsulate enzyme into hydrogel layer grafted on polymeric substrate
Xing Zhu1, Yuhong Ma, Changwen Zhao
1State Key Laboratory of Chemical Resource Engineering, and ‡Key Laboratory of Carbon Fiber and Functional Polymers, Ministry of Education, Beijing University of Chemical Technology , Beijing 100029, China.
Langmuir : the ACS Journal of Surfaces and Colloids
|December 10, 2014
Summary
Researchers developed a new method for enzyme immobilization using visible light to create poly(ethylene glycol) hydrogels on plastic surfaces. This approach preserves enzyme activity and allows for easy reuse, offering a practical solution for biochemical engineering applications.
Area of Science:
- Biochemical Engineering
- Polymer Science
- Enzyme Technology
Background:
- Enzyme immobilization is crucial for biochemical processes, but efficient, practical, and activity-preserving methods remain challenging.
- Existing methods often involve harsh conditions (UV, high temperature) that can denature enzymes.
- In situ encapsulation into hydrogel networks is desirable but difficult to achieve effectively.
Purpose of the Study:
- To develop a novel, efficient, and mild protocol for in situ enzyme immobilization into a hydrogel network.
- To create enzyme-functionalized polymer films with enhanced stability and reusability.
- To demonstrate the versatility of visible light-induced polymerization for enzyme encapsulation.
Main Methods:
- Grafting dormant isopropyl thioxanthone semipinacol (ITXSP) groups onto low-density polyethylene (LDPE) films via UV-induced reaction.
- In situ net-immobilization of lipase into a poly(ethylene glycol) (PEG) hydrogel layer using visible light-induced graft cross-linking polymerization.
- Characterization of the hydrogel properties and enzyme activity retention.
Main Results:
- Visible light and room temperature conditions preserved enzyme activity during immobilization, unlike UV or heat methods.
- Controlled/living polymerization ensured uniform PEG hydrogel formation, preventing enzyme leakage and allowing tunable capacity.
- The resulting enzyme-grafted polymer films exhibited robust performance, retaining nearly all initial activity after seven reuse cycles.
Conclusions:
- The developed strategy offers a simple, effective, and flexible method for enzyme immobilization.
- Visible light-induced polymerization provides a mild and efficient alternative for creating enzyme-functionalized materials.
- The robust and reusable enzyme-grafted films are well-suited for bioreactor applications.
