The flax fibres were soaked in demineralised water
for an hour, filtered and placed in a round bottom
flask, containing acetylating solution. Acetylating
solution consist of 250 ml toluene, 125 ml acetic
anhydride and a small amount of catalyst perchloric
acid (60%). The process temperature of acetylation
was 60°C and duration was 1 to 3 hour. After modification,
the fibre was washed periodically with
distilled water until acid free. Finally modified flax
fibres were air dried for certain time before investigation.