PLLA/聚氧乙烯/改性纳米二氧化钛复合材料制备  

Preparation and Properties of Poly(L-lactic acid)/Polyoxyethylene/Organic Nano-TiO_2 Composites

作　　者：杨刚[1,2] 高群[2] 谢云婷 欧阳春发[2] 郭昀[1] 

机构地区：[1]上海大学材料科学与工程学院,上海200072 [2]上海应用技术学院材料科学与工程学院,上海201418

出　　处：《工程塑料应用》2014年第4期5-8,共4页Engineering Plastics Application

基　　金：上海市科委纳米专项基金资助项目(11 nm0504000)

摘　　要：以左旋聚乳酸(PLLA)、聚氧乙烯(PEO)、改性纳米TiO2为原料,通过熔融共混、热压成型法制备了PLLA/PEO/改性纳米TiO2复合材料,分别采用傅立叶变换红外光谱,电子拉力试验机,广角X射线衍射仪等对改性纳米TiO2的结构及复合材料的力学性能、结晶性能进行表征,并研究了复合材料在NaOH溶液中的降解行为。结果表明,向PLLA/PEO共混物中加入质量分数为1%的改性纳米TiO2能起到增强增韧的作用,并能显著改善复合材料的结晶性能。在NaOH介质中的降解结果表明,复合材料的降解速率随改性纳米TiO2用量的增加而增大,当纳米TiO2质量分数为5%时,复合材料的降解速率最大。Poly（L-lactic acid）（PLLA）/polyoxyethylene（PEO） / organic nano-TiO2 composites were prepared by melt blending and compression molding. The structure of the organic nano-TiO2, and the tensile properties, crystallization performances of the composites were characterized by fourier transform infrared spectrometer, electronic tensile tester, and wide angle X-ray diffraction. The degradation behavior of composites in NaOH solution was also discussed. The results show that the mass fraction of 1% organic nano-TiO2 can reinforce and tough the composites, and improve the crystalline properties of the composites. The degradation results in NaOH solution demonstrates that the degradation rate of the composites is accelerated with the increase of the organic nano-TiO2 content. When the mass fraction of the organce nano-TiO2 is 5%, the degradation rate of the composite is largest.

关 键 词：左旋聚乳酸 聚氧乙烯 改性纳米二氧化钛 复合材料 降解 

分 类 号：TB332[一般工业技术—材料科学与工程]