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Development and Verification of Indirect Test Method for Characterisation of Fibre/Matrix Adhesion in Regenerated Cellulose Fibre Based Composite
2015 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

Cellulosic fibres have been a focus of research within the polymer composite area in recent years and are emerging as a feasible alternative for semi-structural applications to replace synthetic reinforcement (e.g. glass fibres). Their sensitivity to moisture and poor adhesion with polymers are weaknesses that can be solved, or partially eliminated by various fibre surface treatments. An ongoing project is dealing with improvement of fibre/matrix adhesion through modification of RCF by cellulose nanowhiskers using a green chemical process. To characterise the adhesion between these treated fibres and the matrix, short randomly oriented fibre composites were manufactured and tensile tested. Several manufacturing methods were undertaken and injection moulding after melt mixing the material proved to be the only successful process out of the chosen methods. The stress-strain curves obtained after tensile tests and fibre length measurements were then used to calculate interfacial shear strength. A significant amount of degradation was observed in the specimens with treated fibres, caused by the high processing temperature (210-220°C) and comparison with specimens with untreated fibres was therefore not possible. The high degree of degradation of the treated fibres established that the treated fibres cannot undergo such high processing temperatures and recommendations have been made for further work.

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URN: urn:nbn:se:ltu:diva-58444Local ID: f0604f06-e51d-4b24-a417-0185224f893bOAI: diva2:1031832
Subject / course
Student thesis, at least 30 credits
Educational program
Materials Engineering, master's level
Validerat; 20150907 (global_studentproject_submitter)Available from: 2016-10-04 Created: 2016-10-04Bibliographically approved

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