Mechanical and Environmental Durability of High Performance Bio-based Composites
This study is an initial step within the on-going project on development of high performance bio-based composites with improved mechanical (fatigue) and environmental (elevated humidity and temperature) durability. In the presented thesis the performance of cellulosic fibers (flax and regenerated ce...
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Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik
2014
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ftluleatu:oai:DiVA.org:ltu-18040 2023-12-17T10:33:14+01:00 Mechanical and Environmental Durability of High Performance Bio-based Composites Doroudgarian, Newsha 2014 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-18040 eng eng Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik Licentiate thesis / Luleå University of Technology, 1402-1757 http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-18040 urn:isbn:978-91-7439-860-1 urn:isbn:978-91-7439-861-8 Local 67f1d250-fe16-4cc9-9052-adab70dbf581 info:eu-repo/semantics/openAccess Composite Science and Engineering Kompositmaterial och -teknik Licentiate thesis, comprehensive summary info:eu-repo/semantics/masterThesis text 2014 ftluleatu 2023-11-23T17:10:44Z This study is an initial step within the on-going project on development of high performance bio-based composites with improved mechanical (fatigue) and environmental (elevated humidity and temperature) durability. In the presented thesis the performance of cellulosic fibers (flax and regenerated cellulose), bio-based resins (Tribest, EpoBioX, Palapreg, and Envirez) and their composites under exposure to elevated humidity has been studied. Composites reinforcement was in a form of fiber rovings and fabrics to manufacture uni-directional and cross-ply laminates. Water absorption experiments were performed at different humidity levels to measure apparent diffusion coefficient and moisture content at saturation. Effect of chemical treatment (alkali and silane) on fibers as protection against moisture was also subjected to study. The comparison of results for pristine resins and composites showed that primarily cellulosic reinforcement is responsible for moisture uptake in composites. However, fiber treatment did not improve moisture resistance in composites significantly. Mechanical testing was carried out in order to estimate the influence of humidity on behavior of these materials. Results were compared with data for glass fiber and epoxy, as reference materials. The results indicated that some of the bio-based resins and composites with these polymers performed very well and have comparable properties with composites of synthetic epoxy, even at elevated humidity. Godkänd; 2014; 20140204 (newdor); Nedanstående person kommer att hålla licentiatseminarium för avläggande av teknologie licentiatexamen. Namn: Newsha Doroudgarian Ämne: Polymera konstruktionsmaterial/Polymeric Composite Materials Uppsats: Mechanical and Environmental Durability of High Performance Bio-based Composites Examinator: Professor Roberts Joffe, Institutionen för teknikvetenskap och matematik, Luleå tekniska universitet Diskutant: PhD, Chief technology officer Egidija Rainosalo, Technology centre Ketek ltd. Kokkola, Finland Tid: Fredag den 7 ... Master Thesis Luleå Luleå Luleå University of Technology Publications (DiVA) |
institution |
Open Polar |
collection |
Luleå University of Technology Publications (DiVA) |
op_collection_id |
ftluleatu |
language |
English |
topic |
Composite Science and Engineering Kompositmaterial och -teknik |
spellingShingle |
Composite Science and Engineering Kompositmaterial och -teknik Doroudgarian, Newsha Mechanical and Environmental Durability of High Performance Bio-based Composites |
topic_facet |
Composite Science and Engineering Kompositmaterial och -teknik |
description |
This study is an initial step within the on-going project on development of high performance bio-based composites with improved mechanical (fatigue) and environmental (elevated humidity and temperature) durability. In the presented thesis the performance of cellulosic fibers (flax and regenerated cellulose), bio-based resins (Tribest, EpoBioX, Palapreg, and Envirez) and their composites under exposure to elevated humidity has been studied. Composites reinforcement was in a form of fiber rovings and fabrics to manufacture uni-directional and cross-ply laminates. Water absorption experiments were performed at different humidity levels to measure apparent diffusion coefficient and moisture content at saturation. Effect of chemical treatment (alkali and silane) on fibers as protection against moisture was also subjected to study. The comparison of results for pristine resins and composites showed that primarily cellulosic reinforcement is responsible for moisture uptake in composites. However, fiber treatment did not improve moisture resistance in composites significantly. Mechanical testing was carried out in order to estimate the influence of humidity on behavior of these materials. Results were compared with data for glass fiber and epoxy, as reference materials. The results indicated that some of the bio-based resins and composites with these polymers performed very well and have comparable properties with composites of synthetic epoxy, even at elevated humidity. Godkänd; 2014; 20140204 (newdor); Nedanstående person kommer att hålla licentiatseminarium för avläggande av teknologie licentiatexamen. Namn: Newsha Doroudgarian Ämne: Polymera konstruktionsmaterial/Polymeric Composite Materials Uppsats: Mechanical and Environmental Durability of High Performance Bio-based Composites Examinator: Professor Roberts Joffe, Institutionen för teknikvetenskap och matematik, Luleå tekniska universitet Diskutant: PhD, Chief technology officer Egidija Rainosalo, Technology centre Ketek ltd. Kokkola, Finland Tid: Fredag den 7 ... |
format |
Master Thesis |
author |
Doroudgarian, Newsha |
author_facet |
Doroudgarian, Newsha |
author_sort |
Doroudgarian, Newsha |
title |
Mechanical and Environmental Durability of High Performance Bio-based Composites |
title_short |
Mechanical and Environmental Durability of High Performance Bio-based Composites |
title_full |
Mechanical and Environmental Durability of High Performance Bio-based Composites |
title_fullStr |
Mechanical and Environmental Durability of High Performance Bio-based Composites |
title_full_unstemmed |
Mechanical and Environmental Durability of High Performance Bio-based Composites |
title_sort |
mechanical and environmental durability of high performance bio-based composites |
publisher |
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik |
publishDate |
2014 |
url |
http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-18040 |
genre |
Luleå Luleå |
genre_facet |
Luleå Luleå |
op_relation |
Licentiate thesis / Luleå University of Technology, 1402-1757 http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-18040 urn:isbn:978-91-7439-860-1 urn:isbn:978-91-7439-861-8 Local 67f1d250-fe16-4cc9-9052-adab70dbf581 |
op_rights |
info:eu-repo/semantics/openAccess |
_version_ |
1785587153838800896 |