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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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Related Experiment Video

Updated: Jan 7, 2026

Production and Testing of Moisture Behavior and Thermal Properties of Rapeseed Straw and Ganoderma resinaceum Mycelium Bio-Composites
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Production and Testing of Moisture Behavior and Thermal Properties of Rapeseed Straw and Ganoderma resinaceum Mycelium Bio-Composites

Published on: September 5, 2025

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Binderless Thermal Insulation Boards from Rapeseed Straw: Optimization and Performance Analysis.

Miloš Jerman1, Martin Böhm1, Jakub Vrzáň1

  • 1Department of Materials Engineering and Chemistry, Faculty of Civil Engineering, Czech Technical University in Prague, Thákurova 7, 166 29 Prague, Czech Republic.

Materials (Basel, Switzerland)
|December 31, 2025
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Summary

Binderless insulation boards from rapeseed fibers offer a sustainable alternative. Processing conditions and fiber fineness impact moisture properties more than thermal conductivity.

Keywords:
binderless insulation boardshygrothermal performancelignin self-bondingrapeseed strawthermal conductivitywater vapor diffusion

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Area of Science:

  • Materials Science
  • Sustainable Construction
  • Biocomposites

Background:

  • The construction sector significantly impacts the environment.
  • Sustainable thermal insulation materials are essential for reducing this impact.
  • Rapeseed fibers offer potential for eco-friendly insulation due to natural lignin content.

Purpose of the Study:

  • To investigate binderless insulation boards made from rapeseed fibers.
  • To evaluate the effects of fiber fineness and processing temperature on material properties.
  • To determine the suitability of these boards as a sustainable insulation solution.

Main Methods:

  • Preparation of binderless insulation boards from rapeseed fibers.
  • Examination of physical, hygric, and thermal properties.
  • Analysis using microscopy and thermal methods to assess lignin behavior and fiber bonding.

Main Results:

  • Processing temperature had minimal effect on thermal conductivity.
  • Higher temperatures slightly reduced moisture content and swelling.
  • Finer fibers and higher processing temperatures increased the water vapor diffusion resistance factor.
  • Lignin softening and fiber bonding were sufficient at 160 °C, but higher temperatures led to fiber degradation.

Conclusions:

  • Rapeseed straw boards are a viable, vapor-permeable, sustainable insulation material.
  • Processing conditions and fiber fineness primarily influence hygric properties, not thermal performance.
  • These boards are suitable for roof and general insulation applications.