Properties of hemp fibre polymer composites -An optimisation of ...

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146 Risø-PhD-11
Risø’s research is aimed at solving concrete problems in the society. Research targets are set through continuous dialogue with business, the political system and researchers. The effects <strong>of</strong> our research are sustainable energy supply and new technology for the health sector. www.risoe.dk
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Risø-PhD-11(EN) Properties of hemp
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Contents Preface 6 1 Resumé 7 2 Li
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PhD thesis: Properties of hemp fibr
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1 Resumé Karakterisering af hampef
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2.4 Oral presentations Anders Thyge
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4 Introduction Hemp (Cannabis sativ
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4.2 The outline of the thesis The f
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The only fertilizer used was 360/48
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Temperature [ o C] 35 30 25 20 15 1
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A B Figure 7. A: Model of transvers
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Figure 8. Lignin (a), pectin (b) an
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Figure 11. Microfibril angles (MFA)
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Teleman, 1997). The crystal structu
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to the computing effort and the sub
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Figure 15. The structure of hemicel
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fibre mats, which are made by air-d
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Figure 18. From fibre filament to a
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A B C D Figure 20. Chemical structu
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water vapour and air are removed fr
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7 Defibration methods Defibration m
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Table 5. Fibre yield and cellulose
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a b c Composition [% w/w] 100 Compo
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8 Fibre strength in hemp The streng
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8.2 Effect of pre-treatment of hemp
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E-modulus [GPa] 90 80 70 60 50 40 3
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Second mode: Failure is controlled
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structure, which made much higher f
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Table 7. Porosity factors determine
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Thereby, the effective fibre streng
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a b Composite tensile strength σcu
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Table 9. Mechanical properties in a
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a σ c/ρ c [10 3 m 2 /s 2 ] b Ec/
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Fibre strength σ f [MPa] Fibre sti
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11 References Andersen TL, Lilholt
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Kaar WE, Cool LG, Merriman MM, Brin
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Stowell EZ, Liu TS, 1961. On the Me
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Appendix A: Comprehensive composite
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The porosity constants can now be d
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Appendix D: Density and mechanical
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Paper I Changes in chemical composi
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Paper II Hemp fiber microstructure
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ABSTRACT Characterization of hemp f
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METHODS AND TECHNIQUES Treatment of
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Page 97 and 98: By TEM microscopy, the single fiber
Page 99 and 100: Table 1. Chemical composition of th
Page 101 and 102: Table 2. Tensile strength (σ) and
Page 103 and 104: Morvan, C., Jauneau, A., Flaman, A.
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Page 119 and 120: Paper IV Comparison of composites m
Page 121 and 122: ABSTRACT Aligned epoxy-matrix compo
Page 123 and 124: the calculation of volume fractions
Page 125 and 126: solution (pH 4) for 4 h at 85°C. L
Page 127 and 128: E ⎛ dσ c ⎞ = ⎜ ⎟ ⎝ dε
Page 129 and 130: Table 2. Chemical composition, stru
Page 131 and 132: transverse section of the small hem
Page 133 and 134: Long fibres that pass through the e
Page 135 and 136: Figure 6. Effect of composite fabri
Page 137 and 138: DISCUSSION The defibration of hemp
Page 139 and 140: This investigation showed that the
Page 141 and 142: Bos, H.L., Molenveld, K., Teunissen
Page 143 and 144: Thygesen, A., 2006. Properties of h
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