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Thermal and thermo-oxidative stability and kinetics of decomposition of PHBV/sisal composites
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2018 (English)In: Chemical Engineering Communications, ISSN 0098-6445, E-ISSN 1563-5201, Vol. 205, no 2, p. 226-237Article in journal (Refereed) Published
Abstract [en]

The decomposition behaviours of composites made of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) and sisal were assessed in terms of thermal stability and decomposition kinetics, under inert and oxidative conditions, by means of multi-rate linear non-isothermal thermogravimetric experiments. A statistical design of experiments was applied to study the influence of the addition of sisal (0–10–20–30%wt), the presence coupling agent (Yes/No) and the applied conditions of work (inert or oxidative). An improvement of the thermal and thermo-oxidative stability of PHBV with the addition of sisal was observed for all cases. An accurate methodology based on iso-conversional methods was applied to simulate the potential of thermal recovery technologies, such as pyrolysis and controlled combustion, to use these biocomposites after the end of their service life. The mathematical descriptions of both thermo-chemical reactions were helpful in the evaluation of the eventual optimal operational conditions to carry out a suitable energetic valorisation. A minimum of 240°C and 137 kJ/mol of activation energy in inert conditions and 236°C and 118 kJ/mol in oxidative conditions ensured the feasibility of the reactions regardless the composition of the PHBV/sisal biocomposites, which may ease the operability of further energy valorisation with the aim to turn biowaste into new fuels.

Place, publisher, year, edition, pages
Taylor and Francis Ltd. , 2018. Vol. 205, no 2, p. 226-237
Keywords [en]
Biocomposites, kinetics, natural fibres, poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV), sisal, thermal decomposition, thermo-oxidative decomposition, waste-to-fuel, Activation energy, Composite materials, Coupling agents, Decomposition, Design of experiments, Enzyme kinetics, Natural fibers, Oxidation resistance, Pyrolysis, Thermal oil recovery, Waste incineration, Bio-composites, Mathematical descriptions, Poly(3-hydroxybutyrate-co-3-hydroxyvalerate), Statistical design of experiments, Thermo-gravimetric experiments, Thermo-oxidative stability
National Category
Chemical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-223164DOI: 10.1080/00986445.2017.1384921ISI: 000428042400005Scopus ID: 2-s2.0-85038352550OAI: oai:DiVA.org:kth-223164DiVA, id: diva2:1190368
Note

Export Date: 13 February 2018; Article; CODEN: CEGCA; Correspondence Address: Ribes-Greus, A.; Instituto de Tecnología de los Materiales (ITM), Universidad Politècnica de València (UPV), Camino de Vera S/N, Spain; email: aribes@ter.upv.es; Funding details: Generalitat Valenciana; Funding details: UPOV13-3E-1947; Funding details: ENE2014-53734-C2-1-R; Funding details: PSU, Prince of Songkla University. QC 20180314

Available from: 2018-03-14 Created: 2018-03-14 Last updated: 2018-04-11Bibliographically approved

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Strömberg, EmmaEk, MonicaKarlsson, Sigbritt

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