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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...
Biofuels01:25

Biofuels

The microbial conversion of organic matter into biofuels holds potential as a renewable energy source. Among biofuel sources, microalgae are recognized as a highly efficient and adaptable feedstock for biodiesel production, owing to their rapid biomass accumulation, elevated lipid productivity, and capacity to proliferate in diverse aquatic systems, including freshwater, marine, and wastewater habitats. Unlike terrestrial crops, microalgae do not compete for land and can achieve significantly...
Microbial Bioremediation of Plastics01:28

Microbial Bioremediation of Plastics

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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From Plant to Polymers: Micro-Processing Sisal Fiber-Reinforced PLA/PHA Bio-LFTs at Laboratory Scale.

Rumeysa Yıldırım1, Nursel Karakaya2, Bas Liebau2

  • 1Department of Chemical Engineering, Kocaeli University, Kocaeli 41001, Türkiye.

Polymers
|June 27, 2025
PubMed
Summary

This study developed sustainable biocomposites using sisal fibers with poly(lactic acid) (PLA) and polyhydroxyalkanoate (PHA) blends. The bio-LFT composites show enhanced strength and stiffness, highlighting potential for eco-friendly structural materials.

Keywords:
PHAPLAbio-LFTmicrocompoundingthermoplastic composites

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Area of Science:

  • Materials Science
  • Polymer Science
  • Sustainable Materials

Background:

  • Developing high-performance biocomposites is crucial for sustainable material innovation.
  • Challenges exist in processing natural fibers with thermoplastic matrices.
  • Poly(lactic acid) (PLA) and polyhydroxyalkanoate (PHA) offer biodegradable polymer options.

Purpose of the Study:

  • To develop and characterize long fiber-reinforced thermoplastic (LFT) composites using PLA/PHA blends and sisal fibers.
  • To investigate the impact of sisal fiber reinforcement on composite properties.
  • To establish a lab-scale process for fabricating bio-LFT composites.

Main Methods:

  • Fabrication of long fiber composites using a novel lab-scale LFT line.
  • Characterization via Fourier-transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), rotational rheology, mechanical testing, differential scanning calorimetry (DSC), and thermogravimetric analysis (TGA).
  • Evaluation of rheological, mechanical, thermal, and morphological properties.

Main Results:

  • Generally homogeneous sisal fiber dispersion was achieved.
  • Limited interfacial adhesion between sisal fibers and the PLA/PHA matrix was observed.
  • Sisal fiber incorporation significantly improved tensile strength and stiffness.
  • Impact toughness decreased, while crystallinity and thermal stability increased with PHA content and fiber reinforcement.

Conclusions:

  • Sisal fiber reinforcement enhances key mechanical and thermal properties of PLA/PHA biocomposites.
  • The developed lab-scale LFT process is effective for processing natural fibers.
  • These findings support the potential of natural fibers for creating high-performance, sustainable structural biocomposites.