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Fabrication of a Bioactive, PCL-based "Self-fitting" Shape Memory Polymer Scaffold
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Functionalized TMC and ε-CL elastomers with shape memory and self-healing properties.

Siwen Chen1,2, Miaomiao Xiao3, Zhipeng Hou1

  • 1Research Center for Biomedical Materials, Engineering Research Center of Ministry of Education for Minimally Invasive Gastrointestinal Endoscopic Techniques, Shengjing Hospital of China Medical University, Shenyang, China.

Frontiers in Bioengineering and Biotechnology
|November 30, 2023
PubMed
Summary

A novel smart elastomer blend exhibits excellent self-healing and shape memory properties. This biocompatible material shows potential for advanced biomedical applications, including intelligent surgical sutures.

Keywords:
elastomerpolycarbonatepolyesterself-healingshape recovery

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Area of Science:

  • Biomaterials science
  • Polymer chemistry
  • Regenerative medicine

Background:

  • Smart elastomers offer significant potential for biomedical applications due to self-healing and shape memory properties.
  • Conventional polyesters and polycarbonates lack the functional versatility required for advanced biomedical needs.
  • Biocompatible polycarbonates and polyesters have been widely used in biomedical fields for decades.

Purpose of the Study:

  • To develop a new smart elastomer with enhanced functional versatility for biomedical applications.
  • To investigate the self-healing and shape memory capabilities of a novel polyester and polycarbonate blend.
  • To explore the potential of this elastomer in creating self-contracting intelligent surgical sutures.

Main Methods:

  • Synthesized a new smart elastomer, mPEG43-b-(PMBC-co-PCL)n, from polyester and polycarbonate blends.
  • Utilized a physical crosslinking system to impart shape memory and self-healing properties.
  • Characterized the material's mechanical properties, shape recovery, and self-healing efficiency.

Main Results:

  • The elastomer exhibited a tensile strength of 0.38 MPa and a tensile ratio of 1155.6%.
  • Achieved a shape retrieval rate of 93% within 32.5 seconds at 37°C.
  • Demonstrated an 87.6% repair percentage after 6 hours at room temperature with no observed irritation.

Conclusions:

  • The developed elastomer possesses exceptional shape memory and self-healing capabilities.
  • Tunable properties allow for customization by adjusting the MBC and ε-CL proportions.
  • This material provides a strong foundation for developing self-contracting intelligent surgical sutures in the biomedical field.