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Related Concept Videos

Bioplastics01:27

Bioplastics

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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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Biopesticides offer a sustainable alternative to chemical pesticides, utilizing microbial agents to control agricultural pests. Bacillus thuringiensis (Bt) is a widely employed bacterium known for its potent insecticidal activity. Bt biopesticides are favored for their specificity to insect pests, minimal environmental impact, and natural degradability.Mechanism of Bt Toxin Action Bt produces insecticidal crystal (Cry) proteins during its sporulation phase. These proteins form parasporal...
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A Soft Tooling Process Chain for Injection Molding of a 3D Component with Micro Pillars
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Development of crayfish bio-based plastic materials processed by small-scale injection moulding.

Manuel Felix1, Alberto Romero, Felipe Cordobes

  • 1Departamento de Ingeniería Química, Universidad de Sevilla, Facultad de Química, 41012, Seville, Spain.

Journal of the Science of Food and Agriculture
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Summary

This study developed biodegradable plastics from crayfish and glycerol blends. L-cysteine additive enhanced mechanical properties, offering a sustainable alternative to conventional plastics.

Keywords:
bioplasticcrayfish proteinmixing blendsrheologytensile strength test

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Area of Science:

  • Materials Science
  • Polymer Science
  • Biotechnology

Background:

  • Exploration of protein-based materials for biodegradable applications.
  • Investigation of crayfish and glycerol blends as a sustainable plastic alternative.
  • Analysis of additives: sodium sulfite/bisulfite, urea, and L-cysteine.

Purpose of the Study:

  • To develop and evaluate biodegradable plastic materials from crayfish by-products.
  • To assess the impact of various additives on the properties of crayfish-based bioplastics.
  • To determine the feasibility of injection molding for producing these green plastics.

Main Methods:

  • Formulation of plastic materials using crayfish and glycerol blends.
  • Processing via injection molding.
  • Incorporation and analysis of additives: sodium sulfite/bisulfite, urea, and L-cysteine.

Main Results:

  • Additives increased energy efficiency during mixing but had varied effects on mechanical properties.
  • L-cysteine demonstrated the most significant impact, enhancing Young's modulus and thermosetting potential.
  • Higher processing temperatures improved the extensibility of the bioplastics.

Conclusions:

  • Demonstrated the feasibility of creating green, biodegradable plastics from crayfish waste.
  • Highlights potential value-added applications for crayfish by-products.
  • Contributes to the development of sustainable alternatives to conventional plastics.