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Testing bioplastic containing functionalised biochar
Department of Fibre and Polymer Technology, Polymeric Materials Division, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, Stockholm 100 44, Sweden.ORCID iD: 0000-0002-7548-9192
Department of Mechanical Engineering, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences, Chennai, 602105, India.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Fire Engineering.ORCID iD: 0000-0003-4720-5380
School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China.
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2022 (English)In: Polymer testing, ISSN 0142-9418, E-ISSN 1873-2348, Vol. 113, article id 107657Article in journal (Refereed) Published
Abstract [en]

Although flame retardants are very effective in reducing the fire hazard of polymeric materials, their presence may be detrimental to mechanical strength. Hence, in order to have a holistic improvement of performance properties, a new approach has been developed wherein biochar is used to host a naturally-occurring flame retardant (lanosol). The issue of loss in mechanical strength of a polymer host is alleviated by the use of biochar. Three different doping procedures were investigated, namely, dry mixing, and chemical and thermal-based doping, to integrate lanosol into the biochar pores. The doped biochar was used to develop wheat gluten-based blends. The mechanical and flammability properties of the blends were assessed. It was found that thermal doping was the most effective in introducing significant amounts of lanosol particles inside the biochar pores. The bioplastic containing chemically, and thermally doped biochar had equal tensile strength (5.2 MPa), which was comparable to that of the unmodified material (5.4 MPa). The thermally doped biochar displayed the lowest cone calorimeter peak heat release rate (636 kW m−2) for combustion and the highest apparent activation energy (32.4 kJ mol−1) for decomposition. Thus, for flame retarding protein-based matrices, the use of additives thermally doped into biochar is recommended to both simultaneously improve fire-resistance and conserve mechanical strength.

Place, publisher, year, edition, pages
Elsevier, 2022. Vol. 113, article id 107657
Keywords [en]
Bioplastic, Fire testing, Mechanical testing, Flammability analysis
National Category
Materials Chemistry Environmental Sciences Inorganic Chemistry
Research subject
Structural Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-92144DOI: 10.1016/j.polymertesting.2022.107657ISI: 000836763400005Scopus ID: 2-s2.0-85132384416OAI: oai:DiVA.org:ltu-92144DiVA, id: diva2:1682899
Funder
The Swedish Foundation for International Cooperation in Research and Higher Education (STINT), 51911530151Brandforsk, 321-002
Note

Validerad;2022;Nivå 2;2022-07-12 (joosat);

Funder: NSFC (CH2018-7733)

Available from: 2022-07-12 Created: 2022-07-12 Last updated: 2023-09-05Bibliographically approved

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Mensah, Rhoda AfriyieSas, GabrielFörsth, MichaelDas, Oisik

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Perroud, ThéoMensah, Rhoda AfriyieNeisiany, Rasoul EsmaeelySas, GabrielFörsth, MichaelDas, Oisik
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