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A shape-memory poly(ε-caprolactone) hybridized TiO2/poly(l-lactide) composite with antibacterial properties
Xiaohong Hu1, Xiaofeng Song2, Mengfei Xu1
1School of Chemical Engineering, Changchun University of Technology, China.
International Journal of Biological Macromolecules
|August 29, 2023
Summary
This study introduces a novel shape memory composite by integrating TiO2 nanomaterials into poly(ε-caprolactone) and poly(l-lactide). The resulting material exhibits enhanced shape recovery and antibacterial properties, offering a new pathway for advanced functional polymers.
Area of Science:
- Materials Science
- Polymer Science
- Nanotechnology
Background:
- Organic-inorganic composites enhance synthetic polymer properties.
- Shape memory (SM) behavior in these composites is understudied.
- Poly(l-lactide) (PLLA) is a common polymer for SM applications.
Purpose of the Study:
- To develop a novel organic-inorganic composite with enhanced shape memory properties.
- To investigate the effect of TiO2 nanomaterials on the shape memory behavior of PLLA.
- To explore the potential for structure-function integration in synthetic polymers.
Main Methods:
- Poly(ε-caprolactone) hybridized with TiO2 nanomaterial (PCL-TiO2) was synthesized.
- PCL-TiO2 was integrated into PLLA to form a shape memory composite (PCL-TiO2/PLLA).
- Morphological, thermal, and shape memory properties were characterized.
Main Results:
- The PCL-TiO2/PLLA composite exhibited a "sea-island" structure with improved interfacial adhesion.
- The composite demonstrated excellent shape fixing (93.9%) and recovery (94.4%) ratios, returning to its original shape within 15s at 57°C.
- PCL-TiO2 acted as a switching phase and a heat dispersion pump, facilitating shape change and imparting antibacterial properties.
Conclusions:
- The integration of PCL-TiO2 into PLLA creates a high-performance shape memory material.
- The composite offers a promising strategy for developing advanced functional polymers with tailored properties.
- This approach enables structure-function integration for novel material design.
