摘要
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。
In order to prepare the polylactic acid （PLA） composites with excellent strength and toughness, octa （propylglycidyl ether） polyhedral oligomeric silsesquioxane （Ope-POSS） nano particles were added into PLA, and PLA grafted by glycidyl methacrylate （PLA-g-GMA） was added as compatlbilization and toughening component firstly. Then, PLA-g-GMA/Ope-POSS/PLA composites were prepared by melt blending method. Finally, by the characterization of morphological structure, thermal properties, mechanical properties and hydrophobicity of the composites, the effects of the addition of Ope-POSS nano particles and PLA-g-GMA on the properties of the PLA composites were analyzed. The results show that the addition of PLA-g-GMA plays an effective compatibilizing effect for Ope-POSS nano particles, resulting in the better dispersion of Ope-POSS nano particles in the composites. With the amount of well dispersed Ope-POSS nano particles increasing, the strength, thermostability and hydropho- bicity of PLA composites are all improved significantly, and the toughness is also advanced with PLA-g-GMA con- tent increasing. When the PLA-g-GMA and Ope-POSS nano particle contents are 4wt% and 3wt% of PLA respec- tively, the properties of PLA-g-GMA/Ope-POSS/PLA composite are optimal. The obtained conclusions provide theoretical guidance for the further investigation of POSS hybridized PLA composites.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2016年第1期61-70,共10页
Acta Materiae Compositae Sinica
基金
国家科技支撑计划项目(2014BAD02B06)
广东省科技计划(2013B090600120)
中山市产学研合作项目(2013C2FC0022)
关键词
聚乳酸
聚乳酸接枝甲基丙烯酸缩水甘油酯
八聚(丙基缩水甘油醚)倍半硅氧烷
力学性能
热性能
polylaetic acid
polylactic acid grafted by glycidyl methacrylate
octa（propylglycidyl ether） polyhedraloligomeric silsesquioxane
mechanical properties
thermal properties
