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利用注塑机制备了PLA/PBS/秸秆粉可生物降解木塑复合样条,通过电镜扫描(SEM)和力学性能测试,探讨了不同含量的马来酸酐接枝聚乳酸(MAPLA)、5%硅烷处理秸秆粉以及2种相容剂同时加入对PLA/PBS/秸秆粉可生物降解木塑复合材料力学性能和断面微观结构形态的影响。结果表明:当MAPLA含量为5%时,弯曲强度和拉伸强度最大,分别为20.51 MPa和19.03 MPa,较未添加时分别提高了146.72%和118.07%。当MAPLA含量为3%时,冲击强度最大,为20.36 kJ/m~2,较未添加时提高了36.19%。5%硅烷和5%MAPLA组合处理对PLA/PBS/秸秆粉木塑复合材料界面相容性有显著的改善,但对木塑复合材料力学性能的提高不是很明显。
PLA / PBS / straw powder biodegradable wood-plastic composite spline was prepared by using injection molding machine. The effects of different content of maleic anhydride grafted polylactic acid (MAPLA), 5% silane The effects of simultaneous addition of straw powder and two compatibilizers on the mechanical properties and microstructure of PLA / PBS / straw powder biodegradable wood-plastic composites were studied. The results showed that when the content of MAPLA was 5%, the flexural strength and tensile strength were the highest, which were 20.51 MPa and 19.03 MPa, respectively, which increased by 146.72% and 118.07% respectively compared with those without MAPLA. When the content of MAPLA is 3%, the impact strength is the highest, which is 20.36 kJ / m ~ 2, 36.19% higher than that without MAPLA. The combination of 5% silane and 5% MAPLA significantly improved the interfacial compatibility of PLA / PBS / STP wood-plastic composites, but the mechanical properties of wood-plastic composites were not significantly improved.