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RISS 인기검색어
- 검색키워드
- 저자 : Russell J. Varley (검색결과 2 건)
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Bioinspired Hard–Soft Interface Management for Superior Performance in Carbon Fibre Composites
Ben Newman,James D. Randall,Russell J. Varley,Filip Stojcevski,Luke C. Henderson 한국섬유공학회 2023 Fibers and polymers Vol.24 No.9
Nature has evolved to create materials of unmatched performance governed by the interfacial interactions between hard and soft surfaces. Typically, in a carbon fibre composite, one polymer and one type of carbon fibre is used throughout a laminate. In this work, we use a carbon fibre surface modification approach to vary the fibre–matrix interface throughout the laminate to tailor the soft–hard interfaces. We demonstrate this effect using reclaimed carbon fibre materials in a thermoset polymer, then extend this concept to a thermoplastic polymer matrix–polypropylene. The thermoset specimens examined in this work consist of 5 carbon fibre plies, featuring 0, 1, 3 or 5 surface-modified layers located at the centre of the composite. The largest improvements in physical properties for these composites (yield strength, ultimate flexural strength, and tensile modulus) were found when only 1 modified layer of carbon fibre was placed directly within the centre of the composite. Subsequent investigations revealed that for a polypropylene matrix, where the surface chemistry is tailored specifically for polypropylene, improvements are also observed when mixed surface chemistries are used. This work shows that surface modification of reclaimed carbon fibres as non-woven mats can provide significant improvements in mechanical properties performance for structural composites when used in strategically advantageous locations throughout the composite.
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Thomas Groetsch,Maxime Maghe,Claudia Creighton,Russell J. Varley 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.127 No.-
Commercial carbon fibre manufacture is a proprietary process which has resulted in limited informationbeing publicly available in regard to the processing of different materials and their impact on material,environmental and economic characteristics. This study investigates the relationship between differentprecursor materials and these parameters through an in-depth analysis of process structures, materialproperties, incurred emissions, energy demand and cost composition. This study compares three importantprecursor types for carbon fibre manufacture including ecological and economical aspects. Two ofthe precursors are polyacrylonitrile based, a special carbon fibre and textile grade, while the third is a sustainablyderived lignin-cellulose blend. The lower cost textile precursor has significantly higher processingcost than the specialized material while also incurring a higher amount of emissions. Indeed, up to270% more compared to the special grade precursor. The analysis of the lignin-cellulose blend precursorillustrates its shortcomings, especially with respect to processability and properties, despite its lowerenvironmental impact and up to 25% cost advantage. This study suggests pathways for the industrial processingof alternative precursors outlining their economic and ecological benefits and highlighting areasof necessary improvement such as material properties and energy demand.
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