Steam explosion impact to technical hemp fibre diameter
2013
Grave, L., Riga Technical Univ. (Latvia). Dept. of Design and Textile Products Technology | Putnina, A., Riga Technical Univ. (Latvia). Dept. of Design and Textile Products Technology | Kukle, S., Riga Technical Univ. (Latvia). Dept. of Design and Textile Products Technology | Stramkale, V., Agriculture Science Centre of Latgale, Vilani, Vilani area (Latvia)
Microfibres and nanofibres from natural products have high mechanical properties. For this reason researchers pay particular attention to the natural fibres and to the method how they are obtained. In the research samples with different treatments (alkaline pretreatment, steam explosion and water extraction) were investigated to evaluate treatment influence on fibre diameters. Fractionation does not provide actual results of fibres diameter as thinner fibres agglomerate to each other and around thicker fibres and cannot be sieved. Fibre diameter measurement with an optical microscope shows that pretreatment and treatment reduced the thickest fibre percentage and increase the number of fine particles. Dew-retted hemp gives 16% of thicker fibres and only 39% fibres with a diameters less than 63μm. 50% of alkaline pretreated and steam explosion treated fibres diameters are less than 63μm and only 8% of diameters fall in range 160-630μm.
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