Benzoylation
The untreated pineapple fibers (46 g) were mixed with
1 wt % of fiber BPO (0.46 g) dissolved in toluene (2 L)
in a round-bottom glass vessel. The amounts of BPO
used varied from 1, 3, and 5 wt % of fiber. The reaction
was carried out at 80°C with stirring for 1 h under N2
atmosphere. The fibers were removed from the reactor
and washed thoroughly with toluene and dried at
70°C.