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Related Concept Videos

Bioplastics01:27

Bioplastics

Bioplastics derived from microbial processes present a sustainable alternative to conventional petroleum-based plastics. Among these, polyhydroxyalkanoates (PHAs), particularly polyhydroxybutyrates (PHBs), have emerged as prominent candidates due to their biodegradability and biocompatibility. These polymers are synthesized by a variety of bacteria, such as Cupriavidus necator and Pseudomonas putida, which naturally accumulate PHAs as intracellular carbon and energy reserves, especially under...

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Updated: May 20, 2026

Towards Biomimicking Wood: Fabricated Free-standing Films of Nanocellulose, Lignin, and a Synthetic Polycation
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Retrostructural model to predict biomass formulations for barrier performance.

Y Z Zhu Ryberg1, U Edlund, A-C Albertsson

  • 1Fibre and Polymer Technology, Royal Institute of Technology (KTH), Stockholm, Sweden.

Biomacromolecules
|July 19, 2012
PubMed
Summary
This summary is machine-generated.

Renewable wood hydrolysates offer excellent oxygen barrier properties. Hansen solubility parameter modeling and positron annihilation lifetime spectroscopy reveal molecular packing influences barrier performance in new film formulations.

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Area of Science:

  • Materials Science
  • Polymer Science
  • Biomass Utilization

Background:

  • Renewable wood hydrolysates, rich in lignin and polysaccharides, present an opportunity for sustainable film formulations.
  • Understanding the relationship between biomass composition and barrier properties is crucial for developing advanced materials.
  • Existing methods for predicting barrier performance are limited in scope and applicability.

Purpose of the Study:

  • To establish new design principles for film formulations using renewable wood hydrolysates.
  • To develop a predictive model for oxygen-barrier performance based on biomass composition.
  • To investigate the role of molecular packing and free volume in barrier mechanisms.

Main Methods:

  • Development of a Hansen solubility parameter (HSP) model to correlate hydrolysate composition with oxygen permeability.
  • Quantification of subnanometer free volume using Positron Annihilation Lifetime Spectroscopy (PALS).
  • Retrostructural modeling of macromolecular components to understand barrier mechanisms.

Main Results:

  • Hardwood hydrolysates exhibit excellent oxygen-barrier performance.
  • HSP modeling successfully predicted matrix oxygen-permeability data, highlighting molecular packing as a key factor.
  • PALS confirmed that densely packed morphologies regulate permeant diffusion, verifying model predictions.

Conclusions:

  • A generalizable HSP model can predict barrier performance of hydrolysate-based films.
  • Molecular packing and free volume are critical determinants of barrier efficiency in biomass-derived materials.
  • This approach enables systematic formulation of efficient barrier films from diverse hydrolysate feedstocks.