Effect of alkali treated bamboo fibres on mechanical properties of fibre-reinforced green composites

The fibre-reinforced green composites made from bamboo fibre and biodegraded resin(Polylactic Acid) were fabricated by injection molding, effects of alkali treated bamboo fibres on mechanical properties (tensile strength and impact strength) of fibre-reinforced green composites were studied, and variance of main chemical components of alkali treated bamboo fibres and untreated bamboo fibres was characterized by FT-IR spectroscopy, the tensile fracture surfaces and the interfacial adhesion of composites were examined by scanning electron microscopy(SEM). Results showed that surface of alkali treated bamboo fiber became loose and existed gaps, under pressure action polylactic acid melt infiltrate through fiber surface layer, so “glue nails” were formed on the interface polylactic acid and bamboo fiber, interface mechanical occlusive action was improved, therefore mechanical properties of green composites was increased.