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Strong electroactive biodegradable shape memory polymer networks based on star-shaped polylactide and aniline trimer
Meihua Xie1, Ling Wang1, Juan Ge1
1†Center for Biomedical Engineering and Regenerative Medicine, Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, 710049, China.
ACS Applied Materials & Interfaces
|March 6, 2015
Summary
Researchers developed strong electroactive shape memory polymers (ESMPs) using star-shaped polylactide and aniline trimer for tissue engineering. These ESMPs show excellent shape memory, mechanical strength, and promote bone cell growth and differentiation.
Area of Science:
- Biomaterials Science
- Polymer Chemistry
- Tissue Engineering
Background:
- Developing functional shape memory polymers (SMPs) for tissue engineering applications is challenging.
- Existing materials often lack the required mechanical strength, electroactivity, or biocompatibility.
Purpose of the Study:
- To synthesize and characterize novel electroactive shape memory polymer (ESMP) networks.
- To evaluate the potential of these ESMPs for bone regeneration applications.
Main Methods:
- Synthesis of ESMPs using star-shaped polylactide (PLA) and aniline trimer (AT).
- Characterization via NMR, GPC, FT-IR, CV, DSC, DMA, tensile testing, and degradation studies.
- In vitro evaluation of cell proliferation and osteogenic differentiation of C2C12 cells.
Main Results:
- ESMPs exhibited high mechanical strength (modulus > GPa) and excellent shape memory properties (recovery time: seconds, recovery ratio: >94%, fixity ratio: ~100%).
- Cyclic voltammetry confirmed the electroactivity of the ESMPs.
- ESMPs significantly enhanced C2C12 cell proliferation and osteogenic differentiation compared to controls.
Conclusions:
- The developed ESMPs possess a unique combination of strong mechanical properties, tunable degradability, electroactivity, and biocompatibility.
- These intelligent ESMPs demonstrate significant potential for advancing bone regeneration therapies.
