聚乳酸/酯化纤维素/纳米CaCO_3复合材料的制备与表征  

Preparation and Characterization of PLA/Esterified Cellulose/Nano-CaCO_3 Composites

作　　者：邓长勇[1,2] 张秀成[2] 

机构地区：[1]湖北省利川市第一高级中学,湖北利川445400 [2]东北林业大学理学院,黑龙江哈尔滨150040

出　　处：《中国塑料》2011年第1期42-46,共5页China Plastics

摘　　要：采用熔融共混法制备了聚乳酸(PLA)/酯化纤维素/纳米CaCO3复合材料,并通过力学性能测试、差示扫描量热仪、热重分析和扫描电镜等测试手段对复合材料的性能进行了表征。结果表明,当酯化纤维素和纳米CaCO3的总含量小于5%时,能够起到较好的增强作用,复合材料的力学性能明显优于纯PLA;酯化纤维素和纳米CaCO3的加入起到了异相成核作用,但会降低复合材料的热稳定性;酯化纤维素在复合材料中分散充分,无聚集现象;但当填料总含量大于10%时,纳米CaCO3发生明显发生聚集。Poly（lactic acid） （PLA）/esterified cellulose/nano-CaCO3 composites were prepared via melt blending. Properties of the composites were investigated by means of mechanical properties testing, differential scanning calorimeter, thermogravimetry, and scanning electron microscope. When the filler content was less than 5 %, esterified cellulose could be well dispersed in PLA matrix, and the mechanical properties of the composites were improved obviously compared with pure PI.A. The filler acted as a nucleating agent in PLA matrix. However, the thermal stability of the composites was lower than that of PLA. When the filler content was more than 10 %, the aggregation of nano-CaCO3 was observed, which led to unsatisfactory properties of the composites.

关 键 词：聚乳酸 酯化纤维素 纳米CACO3 复合材料 制备 表征 

分 类 号：TB332[一般工业技术—材料科学与工程]