摘要
采用活性稀释剂的环氧基团与纳米SiO2反应,以达到对纳米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)同时对聚氨酯预聚体进行封端,与TDE-85环氧树脂共混,组成纳米SiO2/聚氨酯/环氧树脂复合体系。采用FT-IR、DMA、SEM和万能实验机对体系的相关性能进行表征,结果表明,与纯环氧树脂和聚氨酯/环氧树脂/活性稀释剂复合体系相比,纳米SiO2/聚氨酯/环氧树脂复合体系的相关性能更加优异;加入纳米SiO2的Tg最高为78℃;断面形貌显示体系相容性好且纳米SiO2没有发生团聚;加入3%纳米的SiO2后,体系的拉伸强度和冲击强度达到最高,室温下分别为78.23MPa和50.85kJ/m2,液氮下(-196℃)分别为93.09MPa和62.56kJ/m2。
Chemical functionalization on nano-scaled silica particles and prevention of agglomeration through the reaction between the silanol group of silica and oxirane ring of reactive diluents,E-44 and glycidyl-terminated PU,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,DMA,SEM and universal testing machine,the results showed that the modification of nano-scaled silica particles has success synthesize,the nano SiO2/polyurethane/epoxy resin composite was more excellent performance than epoxy resin and G/E-polyurethane/epoxy resin/reactive diluents composite,it＇s the highest Tg was 78℃ with nano-scaled silica particles,the morphology of section showed good compatibility and prevention of agglomeration,the highest tensile strength and impact strength were appeared when joining 3% of the nano-scaled silica particles,its 78.23MPa and 50.85kJ/m2 at room temperature,its 93.09MPa and 62.56kJ/m2 at liquid nitrogen temperature（-196℃）,respective.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2013年第7期922-925,931,共5页
Journal of Functional Materials
基金
中国工程物理研究院双百人才基金资助项目(20088074)
