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Preparation of thermosensitive microgels via suspension polymerization using different temperature protocols
Ying Zhang1, Wen Zhu, Jiandong Ding
1Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai 200433, China.
Journal of Biomedical Materials Research. Part A
|August 6, 2005
Summary
A novel variable-temperature method improves thermosensitive microgel synthesis for controlled protein drug delivery. This approach enhances microgel formation, enabling efficient encapsulation of proteins like bovine serum albumin.
Area of Science:
- Polymer Chemistry
- Materials Science
- Biomedical Engineering
Background:
- Thermosensitive and biodegradable microgels are promising for controlled drug release.
- Traditional synthesis methods face challenges with high macromer concentrations.
Purpose of the Study:
- To develop an improved synthesis protocol for thermosensitive microgels.
- To evaluate the efficacy of a variable-temperature method for microgel preparation.
Main Methods:
- Synthesis of thermosensitive microgels using inverse suspension polymerization.
- Comparison of constant-temperature versus variable-temperature preparation protocols.
- Postfabrication encapsulation of bovine serum albumin (BSA) into microgels.
Main Results:
- The variable-temperature protocol is superior for high macromer concentrations, preventing premature gelation.
- Both protocols yield spherical microparticles, but with distinct properties at low concentrations.
- Postfabrication encapsulation effectively loaded BSA, leveraging microgel thermosensitivity.
Conclusions:
- The variable-temperature protocol is a robust method for synthesizing thermosensitive microgels across various monomer concentrations.
- This method facilitates the development of advanced drug delivery systems for protein therapeutics.