Optimization of strength properties of bamboo mesoparticles reinforced polyamide 6 using Box-Behnken approach

Bamboo mesoparticles were used as a viable alternative reinforcement in matrix polymers to produce eco-friendly products, and the alternative mesoparticles were used as reinforcement for cheaper processing methods and comparable mechanical properties as nanoparticle. The main factors that influence the mechanical behavior of natural composites are fiber size, fiber loading, and chemical treatment. This study optimized the blending parameters of bamboo mesoparticle/polyamide 6 composites through response surface methodology based on Box-Behnken design. The predicted strength values for these composites as a function of independent variables were obtained from the analysis of variance statistical approach. The analysis of the results showed that fiber size, fiber loading, and alkali concentration variables significantly in quadratic model terms. This model was used to determine the maximum strength, and it was closely in agreement with the experimental finding with the value of R2 = 0.9385. The optimum conditions for tensile strength were identified as fiber size 1 mu m, NaOH of 2 wt.%, and fiber loading of 18 wt.%. The optimum conditions for flexural strength were identified as NaOH of 2 wt.%, particle loading of 13 wt.%, and particle size of 0.46 mu m.