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Related Concept Videos

Biodeterioration01:28

Biodeterioration

Biodeterioration refers to the unwanted alteration of materials caused by microorganisms—especially fungi—which damage both organic substrates (paper, wood, textiles) and inorganic ones (stone, plaster, glass). Unlike abiotic decay, biodeterioration results from biological activity that produces physical disruption and chemical degradation.Physical deterioration occurs as fungal hyphae penetrate pores, cracks, and surface irregularities. Hyphal turgor pressure, thigmotropic growth along...
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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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Polyethylene terephthalate (PET) is a synthetic polymer widely utilized in the packaging industry, particularly for bottles and containers. Due to its chemical stability and durability, PET accumulates in the environment, contributing significantly to plastic pollution. It comprises repeating units of terephthalic acid and ethylene glycol, resulting in a semi-crystalline structure that is resistant to natural degradation processes.A notable breakthrough in plastic biodegradation came with the...

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3D Printable Biocomposites with Tunable Environmental Degradability.

Hannah B Gazdus1,2, Sabrina C Shen3,4, Nicolas A Lee2,3

  • 1Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA.

3D Printing and Additive Manufacturing
|May 1, 2025
PubMed
Summary
This summary is machine-generated.

Researchers developed simple tests to measure the biodegradability of new 3D printable bioplastics made from pectin, chitosan, and cellulose. These sustainable materials showed rapid degradation in various environments, offering alternatives to conventional plastics.

Keywords:
biocompositebiodegradablecompostablesustainability

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Area of Science:

  • Materials Science
  • Environmental Science
  • Biotechnology

Background:

  • Growing environmental concerns necessitate biodegradable alternatives to conventional plastics.
  • Current biodegradable plastics often require specific conditions for decomposition and lack representative testing standards.
  • 3D printing technologies increase plastic waste, highlighting the need for sustainable material solutions.

Purpose of the Study:

  • To develop simple, accessible methods for assessing the environmental degradability of materials.
  • To evaluate the biodegradability of novel 3D printable biotic composites.
  • To demonstrate tunable degradation rates based on material composition.

Main Methods:

  • Developed four simple, equipment-free tests for material degradability assessment.
  • Created 3D printable biotic composites using pectin, chitosan, and cellulose.
  • Tested degradation in live soil, worm burial, high humidity, and aqueous environments.

Main Results:

  • Biotic composites exhibited rapid degradation, with up to 100% mass loss in 21 days for a pectin-based material.
  • Degradation rates were tunable, decreasing with increased chitosan content.
  • Pectin-based materials showed superior degradation compared to those with higher chitosan content.

Conclusions:

  • The developed biotic composites offer a promising biodegradable alternative to conventional plastics.
  • The simple degradation testing methods facilitate wider adoption and development of sustainable materials.
  • These findings support waste reduction in 3D printing and promote end-of-life considerations in product design.