Characterisation of water hyacinth fibre and effect of alkali on needle-punched nonwoven made from water hyacinth

Le résumé fourni par la source

The mechanically extracted fibres from water hyacinth stems/petioles are used to produce a needle-punched nonwoven structure. The fibre yield is around 5%, and the length of fibres ranges between 37 cm and 60 cm. 83% of water hyacinth fibre dissolves in 59.5% H2SO4. The fibre fineness, as calculated, is 5.6 tex, with a low bundle strength (1.5 g/tex) and specific flexural rigidity of 0.94 cN-mm2/tex2. The scanning electron microscopic image of alkali-treated fibre shows the sign of fibre splitting, and the removal of hemicellulose and lignin is confirmed through the Fourier Transform Infrared Spectroscopic study of alkali-treated fibre. The energy dispersive X-ray spectrometer identifies the presence of different compositional elements. The produced nonwoven has excellent water absorbency (∼ 777%), which increases with an increase in sodium hydroxide dose level up to 10%. The sectional air permeability is higher (23-27%) for various concentrations of alkali treatment compared to untreated samples.

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