摘要
用氨基硅油微乳液与水的原位分散方法,制备了有机硅聚合物共混改性接枝环氧树脂水分散液,采用FT-IR、ATR、TEM以及TGA等对该水分散液的粒子形态、粒径以及成膜后的物理性能进行了表征。实验结果表明:与未改性的水分散液相比,改性水分散液的粒径减小,粒径分布变宽,粘度增大。TEM照片表明:有机硅聚合物在分散过程中被包裹在环氧树脂内部,形成“核-壳”结构的复合颗粒。改性水分散液成膜后的疏水、疏油性能和热性能显著提高,表面能降低。膜的超薄切片TEM照片显示:有机硅聚合物在成膜过程中向表面取向与迁移,FT-IR与ATR的测试结果进一步证实它们在膜的表面富集。
Polysiloxane modified epoxy resin aqueous dispersions were prepared by in-situ dispersing waterborne graft epoxy resin with amino-polysiloxane microemulsion. Properties of the modified aqueous dispersions and their films were studied. The modification resulted in dispersions of smaller particles, broader ranges of particle size, and higher viscosity. Observations by TEM （transmission electon microscopy） showed that polysiloxane was wrapped by the epoxy resin to form a ＂core-shell＂ structure. The water and oil repelleycy as well as the heat resistance of the modified film were significantly improved the surface energy of the films was lowered. TEM photographs of the modified films suggested that the polysiloxane particles reoriented and migrated to the film surface during the film formation. Results of ATR （attenuated total refraction） and FT-IR （Fourier transform infrared） spectrum measurements confirmed the enrichment of polysiloxane on the modified surface film.
出处
《华东理工大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2005年第6期747-751,共5页
Journal of East China University of Science and Technology
基金
上海市科委纳米专项基础研究项目(0212nm008)
关键词
环氧树脂
氨基硅油微乳液
水分散液
表面性能
热性能
epoxy resin
polysiloxane microemulsion
aqueous dispersion
surface property
thermal property
