The maximum intensities for the bands assigned to
Si O C and Si O Si bonds were reached for a soaking time of 1h
(Flax T2). As for the concentration, soaking of the fibres in silane
solutions was achieved at very different times in literature, varying from 5min (Rong et al., 2001) to 24h (Yu et al., 2010). Short
times (Flax T4 – 5min) seem not sufficient for the GPS molecules to
be adsorbed on the fibre surface. On the contrary, too long soaking
times (Flax T5 – 24h)