Green fabrication of cellulose-rich agricultural residues for scalable and biodegradable acoustic boards

Bhuvana, Thiruvelu; Tiwari, Anjali; Chandraprakash, C.

doi:10.1016/j.indcrop.2023.117404

Industrial Crops and Products

2023

DOI: 10.1016/j.indcrop.2023.117404

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Green fabrication of cellulose-rich agricultural residues for scalable and biodegradable acoustic boards

Thiruvelu Bhuvana,

Anjali Tiwari,

C. Chandraprakash

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Cited by 6 publications

References 53 publications

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Binder‐free, non‐carcinogenic surfactant‐based cellulose‐rich bagasse foams as acoustic panels

Bikumalla,

Bhuvana,

Tiwari

et al. 2023

J of Applied Polymer Sci

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Toward identifying environmentally friendly sound‐absorbing materials, the fabrication of biodegradable bagasse foams and their acoustic absorption and transmission loss were investigated. 10‐mm‐thick bagasse foams were fabricated using different concentrations of four non‐carcinogenic surfactants: sodium dodecyl sulfate (SDS), sodium bicarbonate (SB), potassium oleate (PO), and polyoxyethylene sorbitol ester (T20). Electron microscopy revealed that the foams comprised microfibers with a 10%–25% porosity. The foams were found to be thermally stable up to 300 °C. While foams fabricated using SDS were found to have a maximum increment in acoustic absorption (by 200%), those made of T20 had a mild decrease in absorption. The increment in absorption was attributed to the decrease in crystallinity and increase in porosity of microstructure, and the decrement to the decrease in viscous nature. Minimal changes were observed in the transmission loss of the foams. The results presented here demonstrate a simple, scalable green method to fabricate porous biodegradable foams of bagasse, without using any binder or filler, suitable for acoustic insulation that fits sustainable development objectives.

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Binder‐free, non‐carcinogenic surfactant‐based cellulose‐rich bagasse foams as acoustic panels

Bikumalla,

Bhuvana,

Tiwari

et al. 2023

J of Applied Polymer Sci

Self Cite

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Aerogel‐like biodegradable acoustic foams of bacterial cellulose

Mehrotra,

Bhuvana,

Tiwari

et al. 2024

J of Applied Polymer Sci

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We report the first work on the development of biodegradable acoustic foams from self‐grown bacterial cellulose (BC) from kombucha solution and green processing techniques. Kombucha BC‐agar and kombucha BC‐polyvinyl alcohol foams were fabricated by using slurries of BC pellicles mixed with the additives, froze for 24 h, and recast into foams using the freeze‐drying method. The foams were aerogel‐like with a density 20 kg/m3, thermally stable upto 220 °C, and crystallinity ~74%. Morphological analysis revealed macropores with coarse walls in agar‐based foams, whereas the PVA‐based foams comprised a polydisperse pore network with coarse walls. A broadband absorption was observed with a maximum of 0.4 for the 2.5‐mm‐thick single‐layer foams and 0.9 for the 12‐mm‐thick multilayer foams. The sound absorption was found to be on par with the biodegradable foams of agar and other cellulose‐rich materials such as agricultural residue, yet with a lightweight. Being largely porous, the foams had little transmission loss. As the densities and the crystallinities of these foams are tunable by the addition of other polymers, the results from this study provide scope to explore BC‐based lightweight materials for large‐scale fabrication suitable for sound absorption over specific regimes.

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A novel ultra-light bio-based fiberboard from mexican feather grass for thermal and acoustic insulation in green building construction applications

Abobakr,

Ait-Dahi,

Bensalah

et al. 2024

Construction and Building Materials

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Green fabrication of cellulose-rich agricultural residues for scalable and biodegradable acoustic boards

Cited by 6 publications

References 53 publications

Binder‐free, non‐carcinogenic surfactant‐based cellulose‐rich bagasse foams as acoustic panels

Binder‐free, non‐carcinogenic surfactant‐based cellulose‐rich bagasse foams as acoustic panels

Aerogel‐like biodegradable acoustic foams of bacterial cellulose

A novel ultra-light bio-based fiberboard from mexican feather grass for thermal and acoustic insulation in green building construction applications

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