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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...
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...
Plasticizers01:31

Plasticizers

Water-reducers, or plasticizers, are chemical admixtures used in concrete to improve strength and workability. These additives reduce the water-cement ratio without compromising workability, lower the cement content while maintaining the same workability, or increase workability to assist concrete placement in inaccessible areas.
Plasticizers function by using surface-active agents to create repulsive electrostatic forces between cement particles. This dispersion enhances the concrete's...

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Related Experiment Video

Updated: May 29, 2026

Preparation of Keratin Hydrolysate from Chicken Feathers and Its Application in Cosmetics
08:29

Preparation of Keratin Hydrolysate from Chicken Feathers and Its Application in Cosmetics

Published on: November 27, 2017

Bioplastics from feather quill.

Aman Ullah1, Thavaratnam Vasanthan, David Bressler

  • 1Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, Alberta, Canada T6G 2P5.

Biomacromolecules
|September 6, 2011
PubMed
Summary
This summary is machine-generated.

Ethylene glycol effectively plasticized poultry feather keratin, improving its thermoplastic properties and mechanical strength. This research offers insights into keratin-based biomaterials for sustainable applications.

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Biomaterials Engineering

Background:

  • Poultry feather quills are an abundant keratinous byproduct.
  • Developing thermoplastic keratin-based materials is crucial for sustainable resource utilization.

Purpose of the Study:

  • To investigate the impact of four plasticizers on the thermoplastic properties of extruded poultry feather keratin.
  • To analyze the molecular interactions, thermal behavior, and mechanical properties of plasticized keratin resins.

Main Methods:

  • Twin-screw extrusion with sodium sulfite treatment.
  • Fourier transform infrared spectroscopy (FTIR) for conformational analysis.
  • Dynamic mechanical analysis (DMA), differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), and tensile strength testing.

Main Results:

  • Ethylene glycol demonstrated superior plasticization, leading to enhanced molecular interaction, a single glass transition, improved mechanical properties, and higher transparency.
  • Glycerol resulted in a two-phase system (glycerol-rich and protein-rich zones).
  • Propylene glycol and diethyl tartrate showed weaker, heterogeneous interactions with keratin, indicated by broad transitions in DMA.

Conclusions:

  • Ethylene glycol is a highly effective plasticizer for poultry feather keratin, yielding superior thermoplastic properties.
  • Plasticizer choice significantly influences the molecular interactions, thermal stability, and mechanical performance of keratin-based materials.
  • This study highlights the potential of keratin-based biomaterials with tailored properties.