纳米SiO_2/蓖麻油封端聚氨酯/环氧树脂复合体系的合成及表征  

The synthesis and characteristics of nano-SiO_2/castor oil based-polyurethane/epoxy resin composites

作　　者：梁玮[1,2,3] 李镇江[1,2,3] 张林[2,3] 朱晓霞[1] 

机构地区：[1]西南科技大学材料科学与工程学院,四川绵阳621010 [2]中国工程物理研究院激光聚变研究中心,四川绵阳621900 [3]西南科技大学中国工程物理研究院激光聚变研究中心,极端条件物质特性联合实验室,四川绵阳621010

出　　处：《功能材料》2013年第12期1772-1777,共6页Journal of Functional Materials

基　　金：中国工程物理研究院双百人才基金资助课题项目(20088074);西南科技大学青年基金资助项目(12zx3117)

摘　　要：采用活性稀释剂的环氧基团与纳米SiO2反应这种新型的改性方法,达到对纳米SiO2的表面改性、防止团聚等目的;以环氧树脂(E44)和缩水甘油(glycidyl)同时对蓖麻油聚氨酯预聚体进行封端,与TDE-85环氧树脂共混,组成纳米SiO2/蓖麻油聚氨酯/环氧树脂的复合体系。采用FT-IR、TGA、SEM和万能试验机对体系的相关性能进行表征并采用DMA对体系的阻尼性能进行了测试,结果表明,与传统的蓖麻油聚氨酯/环氧树脂体系相比,这种新型的纳米SiO2/蓖麻油聚氨酯/TDE-85的复合体系具有更加优异的热性能和力学性能,断面形貌显示体系相容性好且纳米SiO2没有发生团聚;加入改性后的纳米SiO2后,提高了复合体系的阻尼性能,随着改性后纳米SiO2的量不断增加,体系的阻尼性能也不断增强。Chemical functionalization on nano-scaled silica particles and prevention of sgglomeration through the reaction between the silanol group of silica and oxirane ring of reactive diluents, E-44 and glycidyl-terminated COPU, and outstanding performance of TDE-85 epoxy resin, made up of the nano-SiO2/polyurethane/epoxy resin composite. The structure of which was characterized by FT-IR,TGA,SEM and universal testing machine and the damping properties by DMA, the results showed that the modification of nano scaled silica particles has success synthesize, the nano SiO2/polyurethane/epoxy resin composite was more excellent thermal performance and mechanical properties than E/G-poIyurethane/TDE-85 composite, the morphology of section showed good compatibility and prevention of agglomeration, the addition of nano-SiO2 can improve the damping properties of E/G-COPU/TDE-85 composite.

关 键 词：阻尼材料 纳米SIO2 活性稀释剂 聚氨酯 TDE-85环氧树脂 

分 类 号：TQ433.437[化学工程] TG433.436[金属学及工艺—焊接]