Multi-Scale Bionic Structure Constructs Biomass Flame-Retardant Thermal Insulation Foam Material

Area of Science:

• Materials Science
• Sustainable Chemistry
• Biomimetics

Background:

• Growing demand for sustainable thermal insulation in buildings.
• Limitations of current cellulose-based foams include poor fire performance and structural integrity.
• Need for eco-friendly alternatives to petroleum-derived insulation materials.

Purpose of the Study:

• To develop a high-efficiency flame-retardant and structurally stable cellulose-based foam.
• To create a sustainable building material with improved thermal insulation and fire protection.
• To utilize a biomimetic approach for advanced material fabrication.

Main Methods:

• A multiscale biomimetic strategy inspired by mussel adhesion and brick-and-mortar architectures.
• Incorporation of polydopamine as a bridging layer to immobilize bentonite nanosheets in a cellulose network.
• Fabrication via aqueous mechanical foaming and ambient-pressure drying.

Main Results:

• Successful fabrication of cellulose-based biomimetic foam (CBF) with enhanced flame retardancy and low thermal conductivity.
• Demonstrated improved structural stability and environmental compatibility compared to conventional foams.
• Life-cycle assessment showed reduced greenhouse gas emissions and toxicity.

Conclusions:

• The developed CBF offers a green, scalable route to high-performance, degradable thermal insulation.
• This material contributes to safer and more energy-efficient buildings.
• The biomimetic strategy provides a promising pathway for next-generation sustainable building materials.