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Related Concept Videos

Types of Step-Growth Polymers: Polyesters01:20

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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.
Polyesters are commonly prepared from terephthalic acid and ethylene glycol; the crude product is known as poly(ethylene terephthalate) or PET. However, polyesters are synthesized industrially by transesterification of dimethyl terephthalate with ethylene glycol at 150 °C. The two reactants and the polymer...
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Synthesis of Soft Polysiloxane-urea Elastomers for Intraocular Lens Application
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Dielectric Elastomer Generator with Improved Energy Density and Conversion Efficiency Based on Polyurethane

Guoling Yin1, Yu Yang1, Feilong Song1

  • 1Department of Polymer Science and Engineering, School of Chemistry and Biological Engineering, University of Science and Technology Beijing , Beijing 100083, People's Republic of China.

ACS Applied Materials & Interfaces
|January 26, 2017
PubMed
Summary

Researchers developed new polyurethane composites for dielectric elastomer generators (DEGs). These materials significantly enhance energy harvesting from mechanical work, offering a promising solution for practical DEG applications.

Keywords:
compositedielectric elastomer generatorenergy conversionenergy densitypolyurethane

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Area of Science:

  • Materials Science
  • Energy Harvesting
  • Polymer Science

Background:

  • Dielectric elastomer generators (DEGs) harvest mechanical energy but are limited by ideal dielectric elastomer properties.
  • Developing advanced dielectric materials is crucial for practical DEG applications.

Purpose of the Study:

  • To fabricate and evaluate polyurethane-based ternary composites as potential dielectric elastomers for energy harvesting.
  • To investigate the effect of barium titanate (BT) nanoparticles and dibutyl phthalate (DBP) on the properties of polyurethane (PU) for DEGs.

Main Methods:

  • Fabrication of polyurethane-based ternary composites using a solution casting approach.
  • Incorporation of barium titanate (BT) nanoparticles and dibutyl phthalate (DBP) into a thermoplastic polyurethane (PU) matrix.
  • Characterization of dielectric properties, mechanical properties, and energy harvesting performance.

Main Results:

  • The ternary composites exhibited enhanced permittivity, reduced elastic modulus, and good electrical properties compared to pristine PU.
  • A composite with 25 phr BT and 60 phr DBP achieved a harvested energy density of 1.71 mJ/cm³, four times higher than pure PU.
  • Significantly improved mechano-electric energy conversion efficiency was observed in the co-filled composites.

Conclusions:

  • Compositing is a highly effective strategy for developing improved dielectric elastomer materials.
  • The fabricated polyurethane ternary composites show great potential for practical dielectric elastomer generator applications.
  • This work provides a promising pathway for next-generation energy harvesting devices.