Wetting characteristics of long vegetable fibres

摘要

Wettability of long vegetable fibres like jute, ramie, sisal, flax and sunhemp with different binders, such as polyvinyl acetate (PVAc), phenol formaldehyde (PF) and polyester (PET) resin has been determined and compared. Contact angles of different fibre-binder systems have been determined by Sissilidrop method and the wetting parameters such as specific work of adhesion, specific wettability and spreading coefficient calculated. It is observed that the wettability depends on properties of binder and fibre. Polyester resin shows significantly lower wettability than PVAc and PF resins. Additive like diammonium phosphate or urea decreases wettability of PVAc. Among the different fibres studied, ramie shows the highest wettability and sisal the lowest.