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Related Concept Videos

Bioplastics01:27

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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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The introduction of polyesters has brought major development to the textile industry. The wrinkle-free behavior of polyester blends has eliminated the need for starching and ironing clothes.
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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...
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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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Ring-opening metathesis polymerization or ROMP involves strained cycloalkenes as starting materials. The mechanism of ROMP proceeds by reacting cycloalkene with Grubbs catalyst to give metallacyclobutane intermediate which undergoes a ring-opening reaction to form new carbene. The new carbene reacts with another molecule of cycloalkene. Repetition of these steps leads to the formation of an unsaturated open-chain polymer product. All these steps are reversible, however, relieving the ring...
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Designed for Molecular Recycling: A Lignin-Derived Semi-aromatic Biobased Polymer
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Biobased polyurethanes prepared from different vegetable oils.

Chaoqun Zhang1, Samy A Madbouly, Michael R Kessler

  • 1Department of Materials Science and Engineering, Iowa State University , Ames, Iowa, United States.

ACS Applied Materials & Interfaces
|December 27, 2014
PubMed
Summary
This summary is machine-generated.

This study developed novel biobased polyols from vegetable oils using a green synthesis method. These polyols were used to create polyurethanes with tunable thermal, mechanical, and shape memory properties.

Keywords:
polyolpolyurethaneshape memoryvegetable oil

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Area of Science:

  • Polymer Chemistry
  • Materials Science
  • Sustainable Chemistry

Background:

  • The development of sustainable and high-performance polymers is crucial for reducing environmental impact.
  • Biobased polyols offer a renewable alternative to petroleum-based feedstocks in polyurethane synthesis.
  • Understanding the structure-property relationships of biobased polyurethanes is key to their application.

Purpose of the Study:

  • To synthesize novel biobased polyols from various vegetable oils (olive, canola, grape seed, linseed, castor oil).
  • To develop a solvent/catalyst-free method for polyol preparation.
  • To investigate the influence of polyol structure and cross-linking density on polyurethane properties.

Main Methods:

  • Oxidation of triglyceride oils to epoxidized vegetable oils using formic acid and hydrogen peroxide.
  • Ring-opening reaction of epoxidized oils with castor oil fatty acid to form polyols.
  • Characterization of polyol molecular structures and resulting polyurethane properties (thermal, mechanical, shape memory).

Main Results:

  • Successful synthesis of biobased polyols from diverse vegetable oil sources.
  • Demonstrated control over polyurethane properties by adjusting cross-linking density and polyol structure.
  • Polyurethanes exhibited promising thermal, mechanical, and shape memory characteristics.

Conclusions:

  • A novel, green synthetic route for biobased polyols from vegetable oils was established.
  • The study highlights the potential of these biobased polyols for creating advanced polyurethanes.
  • Tailored polyurethanes with desirable properties can be achieved by controlling synthesis and formulation.