溶剂辅助原位分散纳米二氧化硅/聚酯生物弹性体复合材料的制备、结构及性能  

Preparation,structure and properties of nano-silica/poly(glycerol-sebacate-citrate) bioelastomer composites by solvent assistant in-situ dispersion technique

作　　者：刘全勇[1] 胡庆华[2] 张立群[2] 

机构地区：[1]北京航空航天大学化学与环境学院,北京100191 [2]北京化工大学,北京市新型高分子材料制备与加工重点实验室,北京100029

出　　处：《复合材料学报》2011年第1期1-7,共7页Acta Materiae Compositae Sinica

基　　金：中国博士后科学基金(20080430307);国家杰出青年基金(50725310);国家自然科学基金重点项目(50933001)

摘　　要：采用溶剂辅助原位分散方法,制备纳米二氧化硅(nano-SiO2)/聚(癸二酸-甘油-柠檬酸)酯(PGSC)生物弹性体复合材料。通过FTIR、SEM、广角X射线衍射(WXRD)、DSC以及力学测试等手段,对复合材料的结构和性能进行了表征。PGSC基体不仅对nano-SiO2产生包覆,还与nano-SiO2之间形成化学结合。随nano-SiO2质量分数增加,其在基体中的分散更精细均匀。nano-SiO2的加入消弱了基体的有序结构,但是无机填料网络的形成则使复合材料的有序结构增强;加入少量nano-SiO2有利于提高基体的玻璃化转变温度(Tg),但加入较多nano-SiO2时,Tg反而降低。复合材料具有优良的回弹性,其拉伸强度和模量随nano-SiO2质量分数的增加而提高;当质量分数为16.67%时,强度和模量分别提高了602.20%和258.21%。Nano-SiO2/poly（glycerol-sebacate-citrate）（PGSC） bioelastomer composites were prepared by solvent assistant in-situ dispersion technique,and their structure and properties were characterized by FTIR,SEM,WXRD,DSC and tensile tests.Results demonstrate that nano-SiO2 is imbedded in the PGSC matrixes,and chemical bonding is formed between them.Nano-SiO2 presents finer and more homogeneous dispersion with the increasing of its mass fractions.The ordered structures of the matrixes are weakened after nano-SiO2 is added,but the ordered structures of the composites are intensified with the formation of inorganic filler networks.The glass transition temperature（Tg） of the matrix increases when the nano-SiO2 mass fraction is lower,while the Tg decreases when its mass fraction is higher.The composites possess excellent resilience,and their tensile strength and modulus rise with the increasing of nano-SiO2 mass fractions,separately rising by 602.20% and 258.21% at its mass fraction of 16.67% than those of the pure matrixes.

关 键 词：NANO-SIO2 聚(癸二酸-甘油-柠檬酸)酯 制备 原位分散 弹性体 复合材料 力学性能 

分 类 号：TB332[一般工业技术—材料科学与工程]