Effect of Surface Treatment on Mechanical Properties of Poly（Lactic Acid）/Bamboo Particle Biocomposites

To improve interfacial interaction between bamboo particle（BP）and poly（lactic acid）（PLA），sodium hydroxide solution was employed to pretreat BP and maleic anhydride（MAH）was used to compatibilize PLA/BP biocomposites.The biocomposite was prepared by melt blending and hot-pressing.Effects of alkali and MAH treatment on the properties of BP and its biocomposites were investigated using scanning electron microscope and mechanical measurements.Results showed that interfacial interaction between PLA and BP in the biocomposites was improved with MAH compatibilizer.Tensile strength and elongation at break of PLA/BP biocomposites reached maximal values of 47.6 MPa and 6.22%，respectively，when treated with 1.0% MAH.Maximal flexural strength and flexural modulus of 72.61MPa and 4.65 GPa were obtained with 0.5% MAH treatment.