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Researchers nitrated nanostructured bacterial cellulose (NBC) using two acid methods, creating novel cellulose nitrates (NBCNs). These NBCNs retain a unique 3D structure and show potential for advanced materials and energetic polymers.

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Area of Science:

  • Materials Science
  • Biomaterials Engineering
  • Chemical Synthesis

Background:

  • Nanostructured bacterial cellulose (NBC) offers a unique 3D reticulate structure.
  • Traditional cellulose nitrates are derived from plant sources.
  • Developing novel cellulose derivatives with enhanced properties is of significant interest.

Purpose of the Study:

  • To investigate the nitration of nanostructured bacterial cellulose (NBC).
  • To characterize the synthesized nanostructured bacterial cellulose nitrates (NBCNs).
  • To explore potential applications of NBCNs distinct from plant-based cellulose nitrates.

Main Methods:

  • NBC was produced using *Medusomyces gisevii* Sa-12 and freeze-dried.
  • Nitration was performed using mixed acids (MA) or nitric acid with methylene chloride (NA+MC).
  • Characterization involved nitrogen content analysis, viscosity, solubility, SEM, FTIR, TGA, and DTA.

Main Results:

  • Synthesized NBCNs exhibited high nitrogen content (11.77-12.27%) and high viscosity (≥1086 mPa·s).
  • FTIR confirmed the presence of functional nitro groups, and SEM showed preserved reticulate structure.
  • NBCNs demonstrated high purity and specific heats of decomposition (6.94-7.08 kJ/g).
  • The NA+MC derived NBCN sample formed an organogel, suggesting use as an adhesive or energetic gel matrix.

Conclusions:

  • NBCNs possess a unique 3D reticulate structure retained post-nitration, differentiating them from plant-based cellulose nitrates.
  • The synthesized NBCNs are suitable for novel high-tech materials and science-driven applications.
  • The organogel-forming capability of NA+MC derived NBCN opens avenues for energetic polymers and adhesive scaffolds.