黏附和介电特性对PDMS-xBaTiO₃复合薄膜摩擦起电性能的影响

Aiming at the problem of limited practical application due to the low output performance of the triboelectricnanogenerator, PDMS-xBaTiO₃ composite films were prepared (x=0%, 10%, 15%, 20% and 30%)by adding different contents (wt.%) of BaTiO₃ nanoparticles to polydimethylsiloxane (PDMS). The influence of the surface adhesion properties and dielectric properties of the composite films on the triboelectric performance of the films was studied with the triboelectricnanogenerator of the contact and separation mode. The results showed that compared with PDMS film, the triboelectric performance of composite film with BaTiO₃was more than doubled. When the weight ratio of BaTiO₃was less than or equal to 15%, the triboelectric performance increased with the increment of the dielectric constant. When the weight ratio of BaTiO₃was 20%, the triboelectric performance of the composite film decreased because the surface adhesion properties reduced. When the weight ratio of BaTiO₃came to 30%, the triboelectric performance of the composite film decreasedfurther due to the agglomeration of BaTiO₃ nanoparticles.