Naturally-occurring bromophenol to develop fire retardant gluten biopolymers

Document identifier: oai:DiVA.org:ltu-76103
Access full text here:10.1016/j.jclepro.2019.118552
Keyword: Engineering and Technology, Industrial Biotechnology, Bio Materials, Teknik och teknologier, Industriell bioteknik, Biomaterial, Wheat gluten, Fire, Lanosol, Polymer, Trä och bionanokompositer, Wood and Bionanocomposites
Publication year: 2020
Relevant Sustainable Development Goals (SDGs):
SDG 11 Sustainable cities and communitiesSDG 15 Life on landSDG 9 Industry, innovation and infrastructure
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Abstract:

The aim of the study was to impart fire retardancy in wheat gluten polymer through naturally-occurring additives such as lanosol. The fire properties of lanosol were compared with two other conventional brominated fire retardants (Tetrabromobisphenol A and Hexabromocyclododecane). Samples containing fire retardants and gluten were prepared through compression moulding process and then characterised for their fire and mechanical properties. All fire retardants enhanced the reaction-to-fire and thermal properties of gluten while generating V-0 (i.e. vertical position and self-extinguished) ratings in the UL-94 test. The presence of all the fire retardants increased the modulus of the gluten polymer but the fire retardant particles were detrimental for the tensile strength. Nevertheless, lanosol addition delayed ignition and lowered peak heat release rate of gluten by the maximum amount, thereby leading to relatively higher fire performance index (compared to the other fire retardants). Lanosol also allowed the gluten to create a dense char barrier layer during burning that impeded the transfer of heat and flammable volatiles. The fact that only 4 wt% lanosol was able to cause self-extinguishment under direct flame and reduce peak heat release rate by a significant 50% coupled with its inherent occurrence in nature, raises the question if lanosol can be a potential fire retardant in polymeric systems, although it is a bromophenol.

Authors

Oisik Das

Luleå tekniska universitet; Materialvetenskap
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Nam Kyeun Kim

Centre for Advanced Composite Materials, Department of Mechanical Engineering, The University of Auckland, Auckland,New Zealand
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Mikael S. Hedenqvist

Department of Fibre and Polymer Technology, Polymeric Materials division, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, Stockholm, Sweden
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Debes Bhattacharyya

Centre for Advanced Composite Materials, Department of Mechanical Engineering, The University of Auckland, Auckland, New Zealand
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Eva Johansson

Department of Plant Breeding, Faculty of Landscape Planning, Horticulture and Crop Production Sciences, Swedish University of Agricultural Sciences, Alnarp, Sweden
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Qiang Xu

School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing, China
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Shima Holder

Department of Fibre and Polymer Technology, Polymeric Materials division, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, Stockholm, Sweden
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