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Fabrication of a Bioactive, PCL-based "Self-fitting" Shape Memory Polymer Scaffold
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Biodegradable shape-memory polymers using polycaprolactone and isosorbide based polyurethane blends.

Yoon-Suk Joo1, Jae-Ryung Cha1, Myoung-Seon Gong1

  • 1Department of Nanobiomedical Science and BK21 PLUS NBM Global Research Center, Dankook University, Cheonan 31116, Republic of Korea.

Materials Science & Engineering. C, Materials for Biological Applications
|July 24, 2018
PubMed
Summary

This study developed biocompatible polyurethane (PU) and polycaprolactone (PCL) blends for shape-memory applications. The 30%PU/PCL blend demonstrated excellent shape-memory properties, suitable for smart sutures and showing good biocompatibility.

Keywords:
BiocompatibilityBiodegradabilityIsosorbidePolyurethane/polycaprolactone blendsShape-memory polymer

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Area of Science:

  • Biomaterials Science
  • Polymer Chemistry
  • Biomedical Engineering

Background:

  • Thermally responsive shape-memory polymers are crucial in biomedical applications.
  • Developing biocompatible and biodegradable materials is essential for medical devices.
  • Polyurethane (PU) and polycaprolactone (PCL) are promising candidates for such applications.

Purpose of the Study:

  • To create and characterize biocompatible and biodegradable PU/PCL blends with shape-memory properties.
  • To evaluate the thermal, mechanical, and shape-memory behaviors of these blends.
  • To assess the potential of these blends for smart suture applications.

Main Methods:

  • Blending biocompatible polyurethane (PU) with polycaprolactone (PCL) in varying weight percentages (30%, 50%, 70%).
  • Investigating thermal properties, mechanical performance, and shape-memory behavior of the PU/PCL blends.
  • Conducting degradation tests in phosphate-buffered saline at 37°C and cell culture studies with MC3T3-E1 cells.

Main Results:

  • The 30%PU/PCL blend exhibited superior shape-memory characteristics, enabling self-knotting in a hot water bath.
  • Degradation tests showed minimal mass loss (2-4%) over 6 weeks at 37°C.
  • MC3T3-E1 cell cultures demonstrated high adhesion and proliferation on the PU/PCL blends, indicating excellent biocompatibility.

Conclusions:

  • Biocompatible and biodegradable PU/PCL blends possess promising shape-memory properties for biomedical applications.
  • The 30%PU/PCL formulation is particularly suitable for smart suture applications due to its shape-memory performance.
  • These PU/PCL blends exhibit favorable biocompatibility, supporting cell growth and adhesion.