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Ultra-high molecular weight pullulan-based material with high deformability and shape-memory properties.

Zhaoxuan Feng1, Shuyu Chen2, Abdullah Ahmad1

  • 1CAS Key Laboratory of Systems Microbial Biotechnology, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin 300308, China; National Center of Technology Innovation for Synthetic Biology, Tianjin 300308, China.

Carbohydrate Polymers
|August 21, 2022
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Summary

A new sustainable shape-memory polymer (SMP) was developed using microbially produced ultrahigh-molecular-weight (UHMW) pullulan. This eco-friendly material offers high stretchability and programmable shape-memory properties, overcoming limitations of petroleum-based polymers.

Keywords:
4D printingLarge deformabilityMicrobial fermentationPolysaccharidePullulanShape memory

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Biotechnology

Background:

  • Most shape-memory polymers (SMPs) rely on petroleum feedstocks, posing manufacturing and sustainability challenges.
  • Developing novel, eco-friendly alternatives is crucial for advancing polymer science and reducing environmental impact.

Purpose of the Study:

  • To develop a novel shape-memory polymer (SMP) from a sustainable, microbially produced source.
  • To investigate the material properties and fabrication potential of ultrahigh-molecular-weight (UHMW) pullulan-based SMPs.

Main Methods:

  • Ultrahigh-molecular-weight (UHMW) pullulan was cross-linked with 1,4-butanediol diglycidyl ether.
  • The resulting polymer was processed into fibers using wet-spinning techniques.
  • Three-dimensional (3D) printing was employed to create complex structures from the UHMW pullulan-based SMP.

Main Results:

  • UHMW pullulan fibers exhibited high stretchability (1365% strain) and excellent shape-memory properties.
  • 3D-printed UHMW pullulan structures demonstrated complex shapes, large deformability, and shape memory capabilities.
  • These structures showed four-dimensional (4D) programmable deformation in response to solvent stimulation, enabling 4D printing.

Conclusions:

  • A sustainable and eco-friendly SMP was successfully developed using microbially produced UHMW pullulan.
  • This novel pullulan-based SMP offers a promising alternative to petroleum-derived SMPs, with potential applications in advanced materials and manufacturing.
  • The study highlights the feasibility of 4D printing with pullulan-based materials.