Hierarchical Biogenic-Based Thermal Insulation Foam

Journal Article · 31 December 2024 · ACS Nano

DOI: https://doi.org/10.1021/acsnano.4c12328 · OSTI ID:2499275

Meng, Taotao  ^[1]; Zhu, Long ^[1]; Kriney, Hannah ^[1]; Taylor, Alyssa ^[1]; Khuje, Saurabh  ^[1]; Islam, Tashfiqul ^[1]; Zhang, Chen  ^[1]; Ren, Shenqiang  ^[1]

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1. University of Maryland, College Park, MD (United States)

Biogenic-based foam, renowned for its sustainable and eco-friendly properties, is emerging as a promising thermal insulating material with the potential to significantly enhance energy efficiency and sustainability in building applications. However, its relatively high thermal conductivity, large-pore configurations, and energy-intensive manufacturing processes hinder its widespread use. Here, we report on the scalable, one-pot synthesis of biogenic foams achieved by integrating recycled paper pulp and in situ nanoporous silica formation, resulting in a hierarchical structure comprising both micropores and nanopores. Ambient solvent-exchange drying can preserve the pore structure by reducing the capillary forces during the drying process. The resulting flame-retardant and hydrophobic foam exhibits low density (0.110 g/cm³), ideal porosity (70.69%), excellent thermal conductivity (0.033 W/(m·K)), and impressive compressive strength (1.48 MPa at 80% strain). Furthermore, this recyclable biogenic foam, with its hierarchical pore structure and environmental durability, shows great potential for energy-efficient building applications.

• Research Organization: University of Maryland, College Park, MD (United States)
• Sponsoring Organization: USDOE Advanced Research Projects Agency - Energy (ARPA-E)
• Grant/Contract Number: AR0001771
• OSTI ID: 2499275
• Journal Information: ACS Nano, Journal Name: ACS Nano Journal Issue: 1 Vol. 19; ISSN 1936-0851
• Publisher: American Chemical Society (ACS)Copyright Statement
• Country of Publication: United States
• Language: English