Regulation of PANI nanofiber conductivity and its influence on the DC dielectric properties of LDPE

Polymer Testing

Xiangqing Kong¹  Chengcheng Zhang²  Hong Zhao³  Wenxin Liu³  Jiaming Yang³ 

[1]Key Laboratory of Engineering Dielectrics and Its Application, Ministry of Education, Harbin University of Science and Technology, Harbin, 150080, PR China

[2]Corresponding author.

[3]Key Laboratory of Engineering Dielectrics and Its Application, Ministry of Education, Harbin University of Science and Technology, Harbin, 150080, PR China

关键词: Low density polyethylene;    Polyaniline;    Space charge;    Conductivity;    DC breakdown strength;   

DOI  :  

来源: DOAJ

【 摘 要 】

To study the effect of electrical conductivity of nanomaterials on the space charge accumulation in low density polyethylene (LDPE), doped and dedoped polyaniline (PANI) nanofibers with the same diameter and different conductivity were prepared and added into LDPE. The PANI nanofibers and nanocomposites were characterized by scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscope, thermogravimetric analysis (TGA), X-ray diffraction analysis (XRD) and differential scanning calorimeter (DSC). The space charge distribution, direct current (DC) conductivity and DC breakdown strength of the nanocomposites were measured. The addition of either PANI nanofibers enhanced the crystallization, improved the space charge distribution and reduced the conductivity of LDPE. Doped PANI nanofibers had higher conductivity and could more effectively suppress space charge accumulation than dedoped PANI nanofibers. However, doped PANI nanofibers reduced the DC breakdown strength of PANI/LDPE nanocomposites. Overall, dedoped PANI nanofibers were superior for DC dielectric properties of LDPE.

【 授权许可】

Unknown