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Teses / dissertações sobre o tema "Flax"

Autor: Grafiati

Publicado: 4 de junho de 2021

Última modificação: 25 de julho de 2025

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1

Lundin, Emelie. "Flax in flux : Dress flax in a state of flux." Thesis, Konstfack, Textil, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:konstfack:diva-7773.

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2

Radkar, Swarda Satish. "Potential Applications of Flax Fibers." Thesis, North Dakota State University, 2018. https://hdl.handle.net/10365/29879.

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There has been a substantial increase in the usage of natural-fibers and biodegradable polymers due to the needs of the environmental sustainability. The use of natural fibers is inclusive of wide range of applications in load bearing structures, nursing and commercial commodities. In this study, tensile behavior of flax fiber tows removed from woven fabrics were investigated at different moisture levels and compared because one of the major challenges faced in the use of natural fibers is their hydrophilicity. As the moisture content increased from 5% to 80% the tensile strength increased by

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3

Chigaeva, Irina V. "Biochemical improvement of flax-based materials." Thesis, De Montfort University, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.391905.

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4

Whitacre, Ryan John. "Properties of Flax Fiber Reinforced Composites." Thesis, North Dakota State University, 2013. https://hdl.handle.net/10365/26849.

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In the field of renewable materials, natural fiber composites demonstrate the capacity to be a viable structural material. When normalized by density, flax fiber mechanical properties are competitive with E-glass fibers. However, the hydrophilic nature of flax fibers reduces the interfacial bond strength with polymer thermosets, limiting composite mechanical properties. Corn zein protein was selected as a natural bio-based coupling agent because of its combination of hydrophobic and hydrophilic properties. Zein was deposited on the surface of flax, which was then processed into unidirectional

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5

Mühleisen, Martin Bernd. "Chemical weed control : options in fibre flax." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape2/PQDD_0031/MQ64411.pdf.

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6

André, Alann. "Strengthening of timber structures with flax fibres /." Luleå : Luleå University of Technology, 2007. http://epubl.ltu.se/1402-1757/2007/61/.

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7

Donaghy, John Anthony. "Factors affecting the retting of linen flax." Thesis, University of Ulster, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.278388.

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8

Alimuzzaman, Shah. "Nonwoven flax fibre reinforced PLA biodegradable composites." Thesis, University of Manchester, 2014. https://www.research.manchester.ac.uk/portal/en/theses/nonwoven-flax-fibre-reinforced-pla-biodegradable-composites(186ac2dd-0c03-497e-b984-853044fdee59).html.

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The awareness of environmental sustainability drives the composite industry to utilize natural fibres. Natural fibres are a readily available resource with a relatively low price. In this study natural fibre flax reinforced polylactic acid (PLA) biocomposites were made using a new technique incorporating an air-laying nonwoven process. Flax and PLA fibres were blended and converted to fibre webs in the air-laying process. Composite prepregs were then made from the fibre webs. The prepregs were finally converted to composites by compression moulding. The relationship between the main process va

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9

Sparnins, Edgars. "Mechanical properties of flax fibers and their composites." Doctoral thesis, Luleå, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-26640.

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Flax fibers, along with a number of other natural fibers, are being considered as an environmentally friendlier alternative of synthetic fibers in fiber-reinforced polymer composites. A common feature of natural fibers is a much higher variability of mechanical properties. This necessitates study of the flax fiber strength distribution and efficient experimental methods for its determination. Elementary flax fibers of different gauge lengths are tested by single fiber tension in order to obtain the stress-strain response and strength and failure strain distributions. The applicability of singl

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10

Sparnins, Edgars. "Mechanical properties of flax fibers and their composites." Licentiate thesis, Luleå tekniska universitet, Materialvetenskap, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-16871.

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Flax fibers, along with a number of other natural fibers, are being considered as an environmentally friendly alternative of synthetic fibers in fiber-reinforced polymer composites. A common feature of natural fibers is a much higher variability of mechanical properties. This necessitates study of the flax fiber strength distribution and efficient experimental methods for its determination. Elementary flax fibers of different gauge lengths are tested by single fiber tension in order to obtain the stress-strain response and strength and failure strain distributions. The applicability of single

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11

Couture, Scott J. "Agronomic aspects of fibre flax : production in Québec." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/MQ50742.pdf.

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12

Spārniņš, Edgars. "Mechanical properties of flax fibers and their composites." Luleå : Luleå tekniska universitet,Tillämpad fysik, maskin- och materialteknik, Polymerteknik, 2006. http://epubl.ltu.se/1402-1757/2006/60/LTU-LIC-0660-SE.pdf.

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13

Masienė, Ramunė. "Genetic and physiological aspects of flax morphogenesis induction." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2014. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2013~D_20140123_134439-50527.

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Research objective. Investigation of consistent patterns of the induction of flax morphogenesis process, assessment of genetic and physiological aspects of this process and optimization methodologies. Proposition: 1. MOrphogenesis capacity of flax isolated explants depends on a genotype only, but on a composition of a medium and the cultivar type (fibre flax or linseed)also. 2. Cells of different organs of the same genotype have different morphogenic capacity. 3. Combining hormonal ratio with the affect on explats by exogenic factors enables targeted control of the morphogenesis process in vit

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14

Eggie, Kael. "Development of an extruded flax-based feed ingredient." Thesis, McGill University, 2011. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=96997.

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Increasing the content of omega-3 fatty acids in the fatty acid profile of the animal products humans consume is becoming increasingly important as a way of promoting health and reducing the risk of disease. To achieve an improved fatty acid profile in milk and meat from dairy cows, it is necessary to feed the animals with high omega-3 fatty acid content feed. Flaxseed is a feed ingredient which may suffice these needs, however the nature of the omega-3 fatty acids present certain problems at the level of digestion -biohydrogenation in the rumen. Also, the extrusion method of producing a co

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15

McCall, R. D. "The surface characteristics and analysis of flax fibres." Thesis, Queen's University Belfast, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.273082.

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16

Bratt, Richard P. "Spoilage of senescing flax by Botrytis cinerea Pers." Thesis, Queen's University Belfast, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.317056.

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17

Blundy, K. S. "Studies on flax genes and a Ti plasmid." Thesis, University of East Anglia, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.370384.

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18

Piechowski, Jennifer M. "LIS-1 INHERITANCE IN CROSSES AMONGST FLAX VARIETIES." Case Western Reserve University School of Graduate Studies / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=case1433248469.

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19

Wang, Hao. "THE POTENTIAL INDUCING PATTERN OF THE FLAX GENOME." Case Western Reserve University School of Graduate Studies / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=case1532609009820723.

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20

Spārniņš, Edgars. "Mechanical properties of flax fibers and their composites /." Luleå : Division of Polymer Engineering, Luleå University of Technology, 2009. http://pure.ltu.se/ws/fbspretrieve/3353745.

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21

Barvkar, Vitthal. "Genomics and proteomics approaches to study flax seed." Thesis(Ph.D.), CSIR-National Chemical Laboratory, Pune, 2013. http://dspace.ncl.res.in:8080/xmlui/handle/20.500.12252/1919.

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22

Ansari, Imtiyaz Ahmed Mohd Ishaque. "Natural cellulosic fibres for industrial uses." Thesis, University of Leeds, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.249819.

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23

Kernaghan, K. J. "Characterisation of Commercial Flax Fibre Supplies and Development of an Enzyme-Based Treatment Process For Flaz Fibre." Thesis, Queen's University Belfast, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.501298.

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24

Amrouk, El Mamoun. "The economic implications of combining fibre flax contracting along with futures and options to control for farm revenue instability in Quebec /." Thesis, McGill University, 2001. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=31182.

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Due to a rising interest in natural fibres for textiles as well as environmental concerns, the demand for fibre flax has increased in recent decades. It was, therefore, with great enthusiasm that Canadian farmers welcomed, in 1997, the opening of a flaxprocessing unit in the region of Salaberry-de-Valleyfield, Quebec. The purpose of this study was to investigate the economic viability of fibre flax contracting as an alternative activity for field-crop producers in Quebec. A risk-programming model called minimization of total absolute deviation (MOTAD) was developed to better approach this issu

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25

Biyana, Nobuhle Yvonne. "Studies on flax/polypropylene-reinforced composites for automotive applications." Thesis, Nelson Mandela Metropolitan University, 2015. http://hdl.handle.net/10948/d1021150.

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The use of natural fibers as reinforcement in thermoplastics presents an interesting alternative for the production of low cost and ecologically friendly composites. One of the advantages of using natural fibres is their low specific weight, resulting in higher specific strength and stiffness when compared to glass reinforced composites. Natural fibres also present safer handling and working conditions. They are non-abrasive to mixing and can contribute to significant cost reduction. This work is divided into two phases: Phase 1 deals with developing nonwoven mats composites from flax/polyprop

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26

Sam-Brew, Solace Araba. "The use of flax and hemp resource for particleboard." Thesis, University of British Columbia, 2017. http://hdl.handle.net/2429/60617.

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The focus of this study was to investigate flax shive and hemp hurd as alternate residue for particleboard production, investigate the lowest percentage of the pricier polymeric diphenyl methane diisocyanate (pMDI) resin that can be used to effectively bond the residues and evaluate an acrylic-based resin for particleboard manufacture. The flax shive and hemp hurd had lower bulk densities and higher aspect ratios compared with wood. Their higher aspect ratios offered greater overlap in bonding leading to consistently higher bending properties that exceeded American National Standards Institut

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27

Pisupati, Anurag. "Manufacturing and characterization of flax fiber reinforced thermoset composites." Thesis, Ecole nationale supérieure Mines-Télécom Lille Douai, 2019. http://www.theses.fr/2019MTLD0014.

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Cette thèse présente un aperçu des composites thermodurcissables à base de fibres de lin de deux points de vue : fabrication par moulage par injection de résine et caractérisation mécanique. En particulier, deux matrices thermodurcissables ont été étudiées, à savoir l’époxy classique et la benzoxazine biosourcée. L’influence des propriétés intrinsèques des fibres de lin tels que la variabilité, le gonflement de la fibre et l’absorption de liquide sur la fabrication de pièces composites est étudiée. En considérant le gonflement des fibres et l’absorption des liquides, un modèle mathématique pou

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28

Benoit, Nathalie. "Mechanical recycling of high density polyethylene/flax fiber composites." Doctoral thesis, Université Laval, 2017. http://hdl.handle.net/20.500.11794/27713.

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Ce travail de doctorat est consacré à la production, au recyclage mécanique long-terme et à la caractérisation de matériaux polymères et composites à base de polyéthylène haute densité (HDPE) et de fibre de lin. L’objectif est de déterminer l’aptitude au recyclage long-terme de ces composites et de leur matrice, tout en évaluant la perte de performance subie. Le recyclage est réalisé ici par une extrusion en boucle fermée, durant 50 cycles, sans ajout intermédiaire de matières vierges et sans prise en compte de la détérioration et de la contamination subies lors du cycle de vie des produits. D

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29

Islam, Md Zahirul. "Fatigue Behavior of Flax Fiber Reinforced Polymer Matrix Composites." Thesis, North Dakota State University, 2019. https://hdl.handle.net/10365/31577.

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Bio-based flax fiber polymer composites (FFPC) have the potential to replace metals and synthetic fibers in certain applications due to their unique mechanical properties. However, the long term reliability of FFPC needs to be better understood. In this study, the fatigue limit was evaluated using mathematical, thermographic, and energy-based approaches. Each approach determined fatigue limits around 45% load of ultimate tensile strength at a loading frequency of 5 Hz. Thermographic and energy-based approaches were also implemented at different loading frequencies (5, 7, 10, and 15 Hz) to def

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30

Nassiopoulos, Elias. "Localised low velocity impact performance of FLAX/PLA biocomposites." Thesis, Cranfield University, 2015. http://dspace.lib.cranfield.ac.uk/handle/1826/9682.

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Natural fibre composites are fast emerging as a viable alternative to traditional materials and synthetic composites. Their low cost, lightweight, good mechanical performance and their environmentally friendly nature makes them an ideal choice for the automotive sector. The automotive industry has already embraced these composites in production of non-structural components. At present, however, research studies into composites made of natural fibres/bio-sourced thermoplastic resins are at infancy stage and such works are rare in the literature. This study therefore focuses on the mechanical pr

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31

Mohammad, Khanlou Hossein. "Degradation of flax PLA biocomposites during and after manufacture." Thesis, Griffith University, 2018. http://hdl.handle.net/10072/378553.

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With rapidly increasing interest in green composites, natural fibre reinforced plastic (NFRP) biocomposites are becoming a very real alternative composite to the synthetic/man-made composites in indoor applications. Sustainability concerns of the public and recently approved regulations made by governments, in order to reduce the landfill materials, are among the factors that have intensified interest in natural fibre composites. Natural fibres can be used as renewable, sustainable reinforcement due to their small (perceived) environmental footprint. Apart from the environmental concerns, natu

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32

Yang, Haomiao. "Study of a unidirectional flax reinforcement for biobased composite." Thesis, Normandie, 2017. http://www.theses.fr/2017NORMC226/document.

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Dans cette thèse, un composite unidirectionnel à renfort lin (composite UD biosourcé) a été développé et élaboré par la technique de presse à chaud. Le comportement en traction des composites à renfort végétal montre en général deux domaines, mais un troisième domaine est identifié dans ce travail. Un modèle phénoménologique développé précédemment pour décrire le comportement en traction d'un composite à renfort en fils torsadés a été testé avec le composite UD biosourcé. Nous montrons que l'ajout d'un phénomène de consolidation au modèle précédent est nécessaire pour simuler correctement le t

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33

Assaedi, Hasan Suliman. "Characterization and Development of Flax Fibre Reinforced Geopolymer Nanocomposites." Thesis, Curtin University, 2017. http://hdl.handle.net/20.500.11937/57344.

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34

Islam, Md Rafiqul. "Structure of genes of the L locus in flax controlling resistance to rust /." Title page, contents and abstract only, 1986. http://web4.library.adelaide.edu.au/theses/09PH/09phi822.pdf.

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35

Brady, Jamie L. "Characterisation of putative avirulence genes in flax rust, Melampsora lini /." Title page, contents and abstract only, 1993. http://web4.library.adelaide.edu.au/theses/09SM/09smb812.pdf.

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36

Jawaid, Abrar. "The decortication of flax by the application of hydroacoustic radiation." Thesis, Anglia Ruskin University, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.369387.

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37

Faughey, Garry James. "The relationship between flax (Linum usitatissimum) fibre and yarn characteristics." Thesis, Queen's University Belfast, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.322852.

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38

Long, F. N. J. "Factors affecting fibre yield and quality in glyphosate desiccated flax." Thesis, Queen's University Belfast, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.373552.

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39

Fernandes, Monteiro Sampaio Sandra Cristina. "Wet processing of fibre blends containing pre-harvest retted flax." Thesis, De Montfort University, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.414922.

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40

Li, Xiang. "STRESS-INDUCED GENETIC CHANGE IN FLAX REVEALS GENOME VARIATION MECHANISM." Case Western Reserve University School of Graduate Studies / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=case1565964370435691.

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41

Bogdan, Anatoly F. "An investigation of the technology of flax-containing yarn production." Thesis, De Montfort University, 2008. http://hdl.handle.net/2086/13280.

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42

Jacobsson, Elin. "Environmental Impact Analysis of Flax Fibre Cultivation for Composite Reinforcement." Thesis, Mittuniversitetet, Avdelningen för ekoteknik och hållbart byggande, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-34881.

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Searching for environmentally sustainable alternatives for reinforcement of composite materials, flax fibre has one of the most promising potentials due to its desired mechanical properties. The fact that flax is a bio-material, in contrast to conventional synthetic fibres, does not ensure a less environmental impact. One of the major source of environmental impact related to flax fibre as a reinforcement material is the cultivation of flax fibre. In this study the environmental impact of flax fibre cultivation was studied by performing an environmental impact analysis with a life cycle assess

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43

Omann, Franz. "Isolation and molecular characterisation of a multigene family of peroxidases in flax (Linum usitatissimum L.)." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape10/PQDD_0017/NQ44540.pdf.

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44

Zafeiropoulos, Nikolaos Evangelos. "Engineering and characterisation of the interface in flax propylene composite materials." Thesis, Imperial College London, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.271655.

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45

Blackburn, Barbara May. "Investigating changes in the lignin of flax (Linum usitatissimum) during maturity." Thesis, De Montfort University, 2006. http://hdl.handle.net/2086/4428.

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46

Flynn, Jeff. "Characterization of Mechanical Properties in Hybridized Flax and Carbon Fiber Composites." Thesis, North Dakota State University, 2013. https://hdl.handle.net/10365/27207.

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Natural fiber composites have been found to exhibit suitable mechanical properties for general applications. However, when high strength applications are required, natural fibers are typically not considered as a practical fiber. One method for increasing the field of application for natural fibers is by increasing their mechanical properties through hybridizing them with synthetic fibers. The effects of hybridizing flax fibers with carbon fibers were investigated in this research to determine the trends in mechanical properties resulting from varied carbon and flax fiber volumes. The research

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47

Phillips, Steven. "Characterization of flax fibres for application in the resin infusion process." Thesis, McGill University, 2013. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=119345.

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Increasing concerns over depleting natural resources has led to the development of so-called biocomposites based on fibres from renewable resources such as flax. Although these fibres are seeing use in some applications, there is a lack of understanding concerning their processing requirements in relation to their unique physical and chemical properties. Furthermore, there is limited information regarding the links between their processing behaviour and mechanical performance. With the aim of addressing these missing links, this thesis presents a methodology for characterizing flax fibres for

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48

Fillat, Latorre Amanda. "Flax fibre modification using enzyme systems to obtain high-value cellulose products." Doctoral thesis, Universitat Politècnica de Catalunya, 2011. http://hdl.handle.net/10803/38251.

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The aim of this thesis is to modify flax pulp fibres (Linum usitatissimum) by more friendly environmental processes. Pulp and paper research is focussing through enzyme systems investigation for developing green chemistry technologies due to existing environmental concerns and to legal restrictions. Moreover, it exists also an increasing strategic interest in using flax fibres to obtain high-quality specialty papers. That is why we study the application of biotechnology as an efficient alternative to traditional industrial processes based on the use of chemical agents. This wo

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49

Carlson, Sarah Louise. "An integrated approach to investigating the reintroduction of flax production in Iowa." [Ames, Iowa : Iowa State University], 2008.

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50

Mattsson, Josephie. "Technical Analysis of Flax Fiber Reinforced Polypropylene : Prerequisites for Processing and Recycling." Thesis, Karlstads universitet, Fakulteten för teknik- och naturvetenskap, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-32352.

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Nowadays, when environmental concerns are becoming increasingly important are there great interest in natural materials and recyclability. The possibility of reusing materials with maintained mechanical properties are essential for sustainability. Today produced approximately 90,000 tons of natural fiber reinforced composites in Europe of those are 40,000 tons compression molded of which the automotive industry uses 95%. Natural fiber reinforced composites is recyclable and therefore interesting in many applications. Also, natural fiber reinforced composites is inexpensive, light in weight and

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