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Growing Living Composites with Ordered Microstructures and Exceptional Mechanical Properties.

An Xin1, Yipin Su1, Shengwei Feng2

  • 1Sonny Astani Department of Civil and Environmental Engineering, University of Southern California, Los Angeles, CA, 90089, USA.

Advanced Materials (Deerfield Beach, Fla.)
|February 19, 2021
PubMed
Summary
This summary is machine-generated.

Researchers created novel hybrid materials by combining 3D-printed structures with living bacteria. These bio-integrated composites demonstrate remarkable strength and energy absorption, paving the way for advanced synthetic-living materials.

Keywords:
Bouligand structuresliving materialsmineral growthstructural composites

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Area of Science:

  • Biomimetic Materials Science
  • Synthetic Biology
  • Materials Engineering

Background:

  • Living organisms inspire synthetic materials due to their self-growth and regeneration capabilities.
  • Harnessing cellular processes for controlled material fabrication in engineering remains a significant challenge.
  • Natural composites possess sophisticated microstructures and excellent mechanical properties.

Purpose of the Study:

  • To develop a method for growing bionic mineralized composites with predesigned microstructures using living cells.
  • To investigate the mechanical properties and energy absorption capabilities of these novel hybrid materials.

Main Methods:

  • Utilized living bacteria in conjunction with 3D-printed scaffolds.
  • Cultured bacteria to mineralize and form ordered microstructures within the engineered framework.

Main Results:

  • Successfully grew bionic mineralized composites with ordered microstructures.
  • Achieved specific strength and fracture toughness comparable to natural composites.
  • Demonstrated exceptional energy absorption capabilities surpassing natural and artificial materials.

Conclusions:

  • This study presents a novel approach for creating 3D-architectured hybrid synthetic-living materials.
  • The developed materials exhibit superior mechanical performance and energy absorption.
  • Opens new avenues for bio-integrated materials with living, ordered microstructures.