Study on the Dielectric Properties of PSF/BaTiO3/MWCNT Composite Materials
Using physical dispersion emulsification technology,BaTiO3 and carbon nanotubes(MWCNT)were dispersed in polysulfone,and a series of PSF/BaTiO3/MWCNT ternary composite materials were prepared by changing the content of MWCNT.The results showed that BaTiO3 and MWCNT in lotion were evenly coated by PSF resin through thin layer structure,with good dispersion and stability.In addition,the prepared PSF/BaTiO3/MWCNT composite material has a high and stable glass transition temperature(Tg=185 ℃)and initial thermal decomposition temperature(T5％=474 ℃).The dielectric constant of PSF/BaTiO3/MWCNT composite material with 2.5 wt％MWCNT content increased by 104％at 1 MHz,reaching 14.5;But the dielectric loss is still below 0.06.All composite materials have stable dielectric properties between 25 and 185 ℃.
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