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Related Concept Videos

Thermal Insulation in Masonry Walls01:22

Thermal Insulation in Masonry Walls

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In hot, dry climates, the thermal mass of masonry walls can be beneficial, absorbing heat during the day and releasing it at night, thereby stabilizing indoor temperatures. However, in most other climates, additional insulation is necessary to enhance thermal resistance.
External insulation can be applied using an Exterior Insulation and Finish System (EIFS), which involves affixing panels of plastic foam to the wall and covering them with a polymeric stucco reinforced with glass fiber mesh....
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Recycling alginate composites for thermal insulation.

Matteo Cibinel1, Giorgia Pugliese1, Davide Porrelli2

  • 1Department of Engineering and Architecture, University of Trieste, Via Valerio 6/1, 34127, Trieste, Italy.

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This study introduces a novel method for fully recycling alginate/fiberglass foam composites. The process effectively breaks down and reforms the material, maintaining or enhancing its insulation properties through multiple cycles.

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Area of Science:

  • Materials Science
  • Chemical Engineering
  • Sustainable Materials

Background:

  • Alginate-based composite materials offer unique properties but face recycling challenges.
  • Current methods often result in material degradation, limiting reuse.
  • Developing sustainable recycling processes is crucial for composite materials.

Purpose of the Study:

  • To develop a method for the total functional recycling of alginate/fiberglass foam composites.
  • To investigate the feasibility of multiple recycling cycles for these materials.
  • To assess the impact of recycling on the material's thermal, mechanical, and acoustic properties.

Main Methods:

  • Utilized ionotropic gelation to create alginate/fiberglass foam composites.
  • Employed Ethylenediaminetetraacetic acid disodium salt (EDTA) to disassemble the ionic matrix.
  • Re-formed the ionotropic gel under mild acid conditions to achieve functional recycling.

Main Results:

  • Achieved total functional recycling of alginate/fiberglass foam composites.
  • Maintained or improved thermal, mechanical, and acoustic performances after recycling.
  • Successfully demonstrated the viability of multiple recycling cycles.

Conclusions:

  • The developed method enables complete functional recycling of alginate/fiberglass composites.
  • Recycling does not compromise, and can even enhance, key material performances.
  • This approach offers a sustainable solution for managing composite waste.