黏附和介电特性对PDMS-xBaTiO3复合薄膜摩擦起电性能的影响

Influence of the adhesion and dielectric properties on the triboelectric performance of PDMS-xBaTiO3 composite films

针对摩擦纳米发电机输出性能低导致实际应用受限的问题,通过在聚二甲基硅氧烷(PDMS)中添加不同质量分数的BaTiO3纳米颗粒,制备PDMS-xBaTiO3复合薄膜(x=0%,10%,15%,20%和30%)。在接触分离模式的摩擦纳米发电机中,分别研究复合薄膜的表面黏附和介电特性对薄膜摩擦起电性能的影响。结果表明,相比PDMS薄膜,添加BaTiO3的复合薄膜摩擦起电性能提高1倍以上;当BaTiO3的质量分数≤15%时,摩擦起电性能会随着介电常数的增加而增大;当BaTiO3的质量分数为20%时,尽管介电常数进一步增加,但此时表面黏附力最小,复合薄膜的摩擦起电性能下降;当BaTiO3的质量分数为30%时,由于纳米颗粒的团聚导致复合薄膜的摩擦起电性能进一步降低。

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.