Use this URL to cite or link to this record in EThOS: http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.538533
Title: Life cycle assessment of flax fibres for the reinforcement of polymer matrix composites
Author: Dissanayake, Nilmini P. J.
Awarding Body: University of Plymouth
Current Institution: University of Plymouth
Date of Award: 2011
Availability of Full Text:
Access through EThOS:
Access through Institution:
Abstract:
This thesis aims to investigate the sustainability of bast fibres specifically flax fibres as the reinforcement for polymer matrix composites (referenced to glass fibres) by undertaking a quantitative Life Cycle Assessment using the eight environmental impact classification factors of global warming, acidification, eutrophication, human toxicity, aquatic toxicity, ozone depletion, photochemical oxidants creation and non-renewable/abiotic resource depletion. A data set was compiled from numerous literature sources to complete the Life Cycle Inventory for the production of flax fibres. Three scenarios were studied for the production of either flax sliver (pre-spun fibre) or yarn (post-spun fibre): low (no-till combined with warm water retting), average (conservation tillage with stand/dew retting) and high (conventional tillage with bio-retting) energy routes considering different agricultural and fibre preparation (retting) methods. The best agricultural practice for the flax fibre production is identified from this study as the no-till method combined with warm water retting. The environmental credentials for flax fibre can be further improved by using organic fertilisers and biological control of pests. Spinning is the most energy intensive fibre processing operation hence by eliminating this operation energy use and the associated environmental impacts could be reduced. Based on the energy analysis continuous glass fibre reinforcement appears to be superior to spun flax yarn but glass fibre mat and flax sliver are equivalent and embody similar quantities of energy per tonne. The environmental benefit arising from substitution of glass fibres by natural fibre is dependent on the chosen reinforcement format. The key consideration is to use sliver (pre-spun fibres) as reinforcement in polymer matrix composites instead of yarn.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID: uk.bl.ethos.538533  DOI: Not available
Share: