Abstract: Bamboo fibers（BFs）were treated with 10 % NaOH solution, and polyamide 6/bamboo fiber（PA6/BFs）composites were prepared by a twin screw extruder and an injection molding, and analyzed by SEM, DSC, XRD, TG, and mechanical testing. It demonstrated that BFs provided a larger surface area for leaching out the cementing materials during alkali treatment, which improved the mechanically interlocking between bamboo fibers and the PA6 matrix. BFs had good interfacial adhesion with PA6 matrix without obvious gaps. The presence of BFs resulted in more crystal imperfection of the PA6 component, and the increased stiffness of PA6/BFs composite accompanied by a decrease of impact strength, melt flow index, and thermal stability. The combination of reasonably good melt flow index and thermal stability of PA6/BFs composites ensured the processability of the composites during extrusion and injection molding.

Key words: polyamide 6, bamboo fiber, composite, structure, property