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Thermally Drawn Shape and Stiffness Programmable Fibers for Medical Devices.

Jiwoo Choi1,2, Qindong Zheng3, Mohamed E M K Abdelaziz2,4

  • 1Department of Metabolism, Digestion, and Reproduction, Faculty of Medicine, Imperial College London, London, SW7 2AZ, UK.

Advanced Healthcare Materials
|December 31, 2024
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Summary

Researchers developed Shape Memory Polymer Fibers (SMPFs) using thermal drawing for medical uses. These programmable fibers offer adjustable stiffness and shape control, overcoming previous material processing challenges for advanced medical devices.

Keywords:
medical applicationmultimaterial fiberprogrammable fibershape memory polymerthermal drawing

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Area of Science:

  • Polymer Science
  • Biomaterials Engineering
  • Medical Device Technology

Background:

  • Shape Memory Polymers (SMPs) offer unique advantages but face processing limitations.
  • Advances in fiber manufacturing present new avenues for polymer processing.
  • Existing fiber applications are often limited to optical uses.

Purpose of the Study:

  • To develop a thermal drawing technique for fabricating Shape Memory Polymer Fibers (SMPFs).
  • To tailor SMPFs for medical applications requiring programmable stiffness and shape control.
  • To overcome material processing and production challenges associated with SMPs.

Main Methods:

  • Utilized a thermal drawing technique to process SMPs into fibers.
  • Conducted rheological and differential scanning calorimetry analyses to assess material compatibility.
  • Fabricated multilumen, multimaterial SMPFs activated at body temperature.

Main Results:

  • Successfully produced Shape Memory Polymer Fibers (SMPFs) via thermal drawing.
  • Demonstrated SMPF activation at body temperature.
  • Investigated SMPF properties in three distinct medical devices: stiffness-adjustable catheters, a softening neural interface, and shape-programmable cochlear implants.

Conclusions:

  • Thermally drawn SMPFs offer a viable solution for medical applications.
  • The developed technique enables programmable mechanical properties in polymer fibers.
  • SMPFs show significant potential for a wide range of medical devices demanding tailored mechanical performance.