Various chemical treatments have been reported to improve the physicochemical performance of natural fibers such as mercerization, silane treatment, acetylation, benzoylation
, plasma treatment, etc [22-25].
After completion of benzoylation
, the reaction mixture was worked-up as usual which afforded a residue.
of the secondary alcohol in 9 was followed by selective removal of the isopropylidene group to give primary alcohol 10.
0 Treatments Mercerization Benzoylation Silane HRH a Parts per hundred rubber (phr).
After benzoylation, as a result of esterification of the hydroxy] group, the intensities of the peak corresponding to the -OH stretching vibrations in the region 3400-3450 [cm.
The benzoylation and silance treatment reduces the hydrophilic nature of microfibrils.
N-Terminal acetylation or benzoylation
lowered reactivity, suggesting either steric effects or preference for a free amine over an amide.
of the BF makes the surface of the fiber more rough and provides better mechanical interlocking with the polymer matrix.
In benzoylation treatment, benzoyl chloride is most often used in fiber pretreatment and inclusion of benzoyl ([C.
4) showed that the silane, benzoylation and peroxide pretreatment of flax fiber improved the surface properties.
Silane, benzoylation and peroxide treated flax fiber composites showed superior physical and mechanical properties due to better adhesion between fibers and matrix (Table 7) (95).
of sisal fiber was found to enhance the tensile properties of resulting composites.