Flame-retardant cellulose-aerogel composite from agriculture waste for building insulation

Sarkar, Arpita; Islam, Abdullah; Zhu, Long; Ren, Shenqiang

doi:10.1016/j.apmt.2024.102080

Flame-retardant cellulose-aerogel composite from agriculture waste for building insulation

Journal Article · Wed Jan 24 00:00:00 EST 2024 · Applied Materials Today

DOI:https://doi.org/10.1016/j.apmt.2024.102080· OSTI ID:2499281

^[1]; Islam, Abdullah ^[1]; Zhu, Long ^[1]; ^[1]

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

Bio-based thermal insulation materials are in high demand due to their availability, reproducibility, and carbon-sequestration nature. However, high flammability, moisture condensation, and high thermal conductivity of biogenic material are major concerns for sustainable building applications. In this study, we report the fire-retardant cellulose aerogel insulation nanocomposites derived from wheat straw and silica aerogel, in which sodium bicarbonate improves its fire retardancy. We combined blended straw fibers and hammermilled straw fibers to create a structural hierarchy composite. The blended straw, with its longer and thicker size, served as reinforcement, while the hammermilled straw fibers acted as filler. This hierarchical structure was further integrated with aerogel for applications in green buildings. The as-prepared materials show a low thermal conductivity of 24.1 mW/m.K, high flexural modulus of 736 MPa, hydrophobicity with a water contact angle of 110.42°, and excellent fire retardancy. Altogether, this work provides an effective method for the synthesis of fire-retardant biogenic thermal insulation materials and shows a promising way for next-generation bio-based insulation materials.

View Accepted Manuscript (DOE)

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:: 2499281

Alternate ID(s):: OSTI ID: 2282669

Journal Information:: Applied Materials Today, Journal Name: Applied Materials Today Vol. 36; ISSN 2352-9407

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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