Preparation of BaTiO3-MWNT/Polyvinylidene Fluoride Three-phase Composites with Novel Dielectric Behavior
A three-phase composite with multiwall carbon nanotube (MWNT) and BaTiO3 particles embedded into polyvinylidene fluoride (PVDF) is prepared by using a flocculation and hot-molding technique, which is eco-friendly compared with solution method avoiding the pollution of solvent to the air. The uniform dispersion of fillers in matrix is realized and the dielectric constant is as high as 924 at 102 Hz when the volume concentrations of MWNT and BaTiO3 are 0.02 and 0.2, respectively, which is four times larger than that of MWNT/PVDF composite with 2vol％ MWNT prepared by solution method (ε=231). Meanwhile, the incorporation of the third phase decreases the dielectric loss abruptly (672→67at 102Hz). This phenomenon can be explained well by employing the interaction between two kinds of fillers and the evolutions of microcapacitance structure.
three-phase composites carbon nanotube BaTiO3 dielectric constant
Shenghong YAO Jinkai YUAN Zhimin DANG Jinbo BAI
Key Laboratory of Beijing City for Preparation and Possessing of Novel Polymer Materials, Beijing Un Key Laboratory of Beijing City for Preparation and Possessing of Novel Polymer Materials,Beijing Uni Laboratoire MSSMAT, Ecole Centrale Paris, Paris, 92295, FRANCE
国际会议
哈尔滨
英文
765-768
2009-07-19（万方平台首次上网日期，不代表论文的发表时间）