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Three-Dimensional Hierarchical Cellulose Structures Based on Microbial Synthesis and Advanced Biofabrication.

Shan Liu1, Muxuan Yang1, Weinan Xu1

  • 1School of Polymer Science and Polymer Engineering, The University of Akron, Akron, Ohio 44325, United States.

Chem & Bio Engineering
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Summary
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Researchers explore 3D printing with bacterial cellulose (BC) for advanced materials. Integrating additive manufacturing with microbial biosynthesis offers new possibilities for creating complex cellulose structures.

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Area of Science:

  • Biomaterials Science
  • Polymer Science
  • Biofabrication

Background:

  • Cellulose is a globally abundant biopolymer, with bacterial cellulose (BC) produced by bacteria like *Komagataeibacter xylinus*.
  • Fabricating 3D BC structures is challenging due to oxygen requirements for biosynthesis and BC's inherent crystallinity and poor processability.
  • Recent advances in additive manufacturing and biofabrication offer novel strategies for creating hierarchical 3D cellulose structures.

Purpose of the Study:

  • To critically examine advanced biofabrication technologies for hierarchical 3D cellulose structures.
  • To explore the integration of additive manufacturing with in situ microbial biosynthesis for cellulose fabrication.
  • To discuss sustainable biocomposites based on BC and microbial biosynthesis.

Main Methods:

  • Reviewing additive manufacturing techniques for incorporating BC or cellulose-generating bacteria into 3D printing feedstock.
  • Investigating in situ BC biosynthesis within living inks using cellulose-producing bacteria.
  • Analyzing the potential of combining microbial biosynthesis with 3D printing for complex structure fabrication.

Main Results:

  • Additive manufacturing and biofabrication provide versatile approaches for hierarchical 3D cellulose structures.
  • Incorporating bacteria into living inks enables in situ BC biosynthesis for complex geometries.
  • Sustainable biocomposites can be developed using BC and microbial biosynthesis.

Conclusions:

  • Integrating additive manufacturing with microbial biosynthesis holds significant potential for fabricating advanced 3D cellulose structures.
  • Challenges remain in controlling BC biosynthesis and material properties for specific applications.
  • Future opportunities lie in developing novel applications in tissue engineering, drug delivery, and advanced composites.