聚乳酸/纳米二氧化硅原位复合材料的制备和性能  

Preparation and properties of polylactide/nano-silica in situ composites

作　　者：刘立柱[1] 马红杰[1] 朱兴松[1] 金镇镐[1] 樊渝江[2] 

机构地区：[1]哈尔滨理工大学材料科学与工程学院,黑龙江哈尔滨150040 [2]四川大学国家生物医学材料工程技术研究中心,四川成都650065

出　　处：《北京化工大学学报（自然科学版）》2008年第1期66-69,共4页Journal of Beijing University of Chemical Technology(Natural Science Edition)

基　　金：黑龙江省教育厅海外学人科研资助项目(1055HZ028)

摘　　要：以丙交酯和改性后的纳米二氧化硅为原料,在辛酸亚锡催化作用下,制备了聚乳酸纳米二氧化硅复合材料。分别用红外光谱(FT-IR),热失重分析(TG),扫描电镜(SEM)等对其化学结构和性能进行了分析和表征。FT-IR和SEM分析表明,纳米二氧化硅与聚乳酸发生了化学结合,并且均匀的分散于聚乳酸基体中。TG结果表明,随着纳米二氧化硅含量的增加,聚乳酸纳米二氧化硅复合材料的热稳定性提高。通过力学性能分析可以看出无机纳米粒子的加入提高了材料的拉伸强度。Polylactide/nano-silica composites were synthesized with lactide and modified nano-silica by tin octoate catalyst. The structures and properties of the composites were characterized by FT-IR, TG and SEM. The results of FT-IR and SEM showed that nano-silica and polylactide are connected with covalent bonds, and inorganic phases are dispersed in polylactide homogeneously. The results of TG indicated that thermal decomposition temperature is increased with the increasing of silica content. The tensile strength of composites was enhanced because of adding nano-inorganic particles into polylactide.

关 键 词：聚乳酸 纳米二氧化硅 原位复合材料 

分 类 号：TB332[一般工业技术—材料科学与工程]