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为了制备具有优异强度与韧性的聚乳酸(PLA)复合材料,首先,将八聚(丙基缩水甘油醚)倍半硅氧烷(Ope-POSS)纳米粒子引入PLA中,并加入PLA接枝甲基丙烯酸缩水甘油酯(PLA-g-GMA)作为增容增韧组分;然后,通过熔融共混法制备了PLA-g-GMA/Ope-POSS/PLA复合材料;最后,通过对复合材料形态结构、热性能、力学性能及疏水性的表征分析了Ope-POSS纳米粒子及PLA-g-GMA的加入对PLA复合材料性能的影响。结果表明:PLA-g-GMA的加入对Ope-POSS纳米粒子具有良好的增容效果,可使得Ope-POSS纳米粒子在复合材料中均匀分散;随着良好分散的Ope-POSS纳米粒子的数量增加,PLA复合材料的强度、热稳定性及疏水性均得到明显的提高,韧性也随PLA-g-GMA含量增加而得到改善;当PLA-g-GMA和Ope-POSS纳米粒子含量分别为PLA的4wt%和3wt%时,PLA-g-GMA/Ope-POSS/PLA复合材料性能最佳。所得结论为POSS杂化PLA复合材料的深入研究提供了理论指导。
To prepare polylactic acid (PLA) composites with excellent strength and toughness, first, Ope-POSS nanoparticles were introduced into PLA and PLA grafted armor PLA-g-GMA as compatibilizing toughening component; then PLA-g-GMA / Ope-POSS / PLA composites were prepared by melt blending method; finally, Characterization of Structure, Thermal Properties, Mechanical Properties and Hydrophobicity The effects of Ope-POSS nanoparticles and PLA-g-GMA on the properties of PLA composites were analyzed. The results show that the addition of PLA-g-GMA has good compatibilizing effect on Ope-POSS nanoparticles, which can make the Ope-POSS nanoparticles disperse uniformly in the composites. With the increase of the number of Ope-POSS nanoparticles dispersed well G-GMA and PLA-g-GMA, respectively. The strength, thermal stability and hydrophobicity of PLA composites were significantly improved. The toughness of PLA composites was also improved with the PLA-g-GMA content increasing. PLA-g-GMA / Ope-POSS / PLA composites performed best at 4wt% and 3wt%. The conclusions obtained provide theoretical guidance for the further study of POSS hybrid PLA composites.