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Functionalised biochar in biocomposites: The effect of fire retardants, bioplastics and processing methods
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Fire Engineering.ORCID iD: 0000-0002-5474-1512
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Fire Engineering.ORCID iD: 0000-0003-4720-5380
Department of Mechanical Engineering, Assam Energy Institute, Centre of Rajiv Gandhi Institute of Petroleum Technology, 785697, Sivasagar, Assam, India.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Fire Engineering.ORCID iD: 0000-0002-5247-3390
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2023 (English)In: Composites Part C: Open Access, E-ISSN 2666-6820, Vol. 11, article id 100368Article in journal (Refereed) Published
Abstract [en]

Fire retardants, although can impart fire-safety in polymeric composites, are detrimental to the mechanical properties. Biochar can be used, in conjunction with fire retardants, to create a balance between fire-safety and mechanical performance. It is possible to thermally dope fire retardants into the pores of biochar to make it functionalised. Thus, the current work is intended in identifying a composite having the combination of the most desirable fire retardant, bioplastic, and a suitable processing method. A comparison was made between two fire retardants (lanosol and ammonium polyphosphate), bioplastics (wheat gluten and polyamide 11), and composite processing methods (compression and injection moulding). It was found that wheat gluten containing ammonium polyphosphate-doped biochar made by compression moulding had the best fire-safety properties with the lowest peak heat release rate (186 kW/m2), the highest fire performance index (0.6 m2s/kW), and the lowest fire growth index (1.6 kW/ms) with acceptable mechanical properties compared to the corresponding neat bioplastic. Thus, for gluten-based polymers, the use of ammonium polyphosphate thermally doped into biochar processed by compression moulding is recommended to both simultaneously improve fire-safety and conserve the mechanical strength of the resulting biocomposites.

Place, publisher, year, edition, pages
Elsevier, 2023. Vol. 11, article id 100368
Keywords [en]
Biochar, Bioplastics, Compression moulding, Fire retardants, Injection moulding
National Category
Materials Chemistry Paper, Pulp and Fiber Technology
Research subject
Structural Engineering; Wood Science and Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-98229DOI: 10.1016/j.jcomc.2023.100368ISI: 001016720900001Scopus ID: 2-s2.0-85160716623OAI: oai:DiVA.org:ltu-98229DiVA, id: diva2:1766638
Funder
Brandforsk, 321–002
Note

Validerad;2023;Nivå 2;2023-06-13 (hanlid)

Available from: 2023-06-13 Created: 2023-06-13 Last updated: 2024-03-07Bibliographically approved

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Das, OisikMensah, Rhoda AfriyieShanmugam, VigneshwaranFörsth, MichaelLin, Chia-Feng

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