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Temperature-responsive cross-linked poly(epsilon-caprolactone) membrane that functions near body temperature
Koichiro Uto1, Kazuya Yamamoto1, Shohei Hirase1
1Department of Nanostructure and Advanced Materials, Graduate School of Science and Engineering, Kagoshima University, 1-21-40, Korimoto, Kagoshima 890-0065, Japan.
Summary
This study developed a novel temperature-responsive polymer material that effectively controls drug release near body temperature. The material
Area of Science:
- Polymer Science and Engineering
- Biomaterials Science
- Materials Chemistry
Background:
- Developing smart materials that respond to physiological temperature changes is crucial for advanced drug delivery systems.
- Poly(epsilon-caprolactone) (PCL) based materials offer tunable properties but require precise structural control for specific thermal responses.
- Existing temperature-responsive materials often lack sensitivity or precise control around the critical body temperature range.
Purpose of the Study:
- To engineer a sensitive temperature-responsive material capable of functioning effectively near human body temperature (approximately 37°C).
- To investigate the influence of branched poly(epsilon-caprolactone) macromonomer architecture on material transition temperatures.
- To demonstrate the material's capability in controlling the release of a model drug, prednisolone.
Main Methods:
- Synthesis and compounding of 2-branched and 4-branched poly(epsilon-caprolactone) macromonomers.
- Cross-linking of macromonomers to form temperature-responsive polymer networks.
- Characterization of thermal properties using differential scanning calorimetry (DSC).
- Structural analysis using X-ray diffraction (XRD).
- Evaluation of drug permeation control using prednisolone as a model drug.
Main Results:
- The transition temperatures of the cross-linked materials were significantly modulated by the mixing ratios of the 2-branched and 4-branched poly(epsilon-caprolactone) macromonomers.
- Total macromonomer concentrations also played a dominant role in tuning the material's thermal transition behavior.
- The developed materials demonstrated successful control over the permeation of prednisolone, a model drug, in proximity to body temperature.
Conclusions:
- The strategic combination of different branched poly(epsilon-caprolactone) macromonomers allows for precise tuning of temperature-responsive properties.
- This approach yields materials with transition temperatures effectively controlled near body temperature, suitable for biomedical applications.
- The developed polymer system shows promise for controlled drug delivery applications requiring temperature-triggered release mechanisms.