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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.
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Step growth polymerization involves bi or multifunctional monomers. Bifunctional monomers react to form linear step growth polymers, whereas multifunctional monomers react to form non-linear or branched polymers.
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The expansion of alcohol in a thermometer is one of many commonly encountered examples of thermal expansion, which is the change in size or volume of a given system as its temperature changes. The most visible example is the expansion of hot air. When air is heated, it expands and becomes less dense than the surrounding air, which then exerts an upward force on the hot air to, for example, make steam and smoke rise, and hot air balloons float. The same behavior happens in all liquids and gases,...
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Updated: Jun 2, 2025

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Hierarchical Biogenic-Based Thermal Insulation Foam.

Taotao Meng1, Long Zhu1, Hannah Kriney1

  • 1Department of Materials Science and Engineering, University of Maryland, College Park, Maryland 20742, United States.

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Researchers developed a novel biogenic foam using recycled paper and silica. This sustainable insulation material offers excellent thermal performance and durability for energy-efficient buildings.

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biogenic foamfoamssolvent changesustainable insulationthermal-insulating

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Area of Science:

  • Materials Science
  • Sustainable Engineering
  • Building Science

Background:

  • Biogenic foams are eco-friendly thermal insulators but face challenges with high thermal conductivity and pore structure.
  • Existing biogenic materials often have limitations in performance and manufacturing scalability for building applications.

Purpose of the Study:

  • To develop a scalable, one-pot synthesis method for advanced biogenic foam insulation.
  • To improve thermal insulation properties and mechanical strength of biogenic foams for building applications.

Main Methods:

  • Integration of recycled paper pulp with in situ nanoporous silica formation.
  • Utilized ambient solvent-exchange drying to preserve hierarchical pore structure (micropores and nanopores).
  • Characterization of foam properties including density, porosity, thermal conductivity, and compressive strength.

Main Results:

  • Achieved a recyclable, flame-retardant, and hydrophobic biogenic foam with low density (0.110 g/cm³).
  • Demonstrated excellent thermal conductivity (0.033 W/(m·K)) and high porosity (70.69%).
  • Exhibited impressive compressive strength (1.48 MPa at 80% strain) and environmental durability.

Conclusions:

  • The novel biogenic foam possesses a hierarchical pore structure suitable for enhanced thermal insulation.
  • This material shows significant potential for sustainable and energy-efficient building applications.
  • The scalable synthesis method offers a viable pathway for commercialization of eco-friendly insulation.