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Representative physical blending strategies for preparing flame-retardant cellulose-based materials. (a) CNF/zinc borate aerogel. Adapted with permission. Copyright 2020, Springer. (b) Bacterial cellulose/zinc borate composite aerogel. Adapted with permission. Copyright 2023, Springer. (c) CNF/sepiolite aerogel composite. Adapted with permission. Copyright 2025, Springer. (d) Sodium bicarbonate-filled cellulose nanofibril aerogel. Adapted with permission. Copyright 2018, American Chemical Society under CC BY 4.0.
