Epoxy-Nanocomposites with Ceramic Reinforcement for Electrical Insulation

被引:16
作者
Amendola, E. [1 ,2 ]
Scamardella, A. M. [1 ,3 ]
Petrarca, C. [4 ]
Acierno, D. [3 ]
机构
[1] Italys Natl Council Res, Inst Composite & Biomed Mat, I-80055 Naples, Italy
[2] IMAST, I-80055 Naples, Italy
[3] Univ Naples Federico II, Dept Mat & Prod Engn, I-80125 Naples, Italy
[4] Univ Naples Federico II, Dept Elect Engn, I-80125 Naples, Italy
关键词
dielectric properties; resins; thermal properties; BEHAVIOR; RESIN;
D O I
10.1002/app.34782
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
Ceramic nanoparticles, that is, SiO2, TiO2, and Al2O3 nanoparticles, with increasingly high thermal conductivity (lambda), represent good candidates for improving the thermophysical properties of epoxy resins. In this study, the influence of filler addition on the thermal, mechanical, and dielectric properties were investigated by means of differential scanning calorimetry, dynamic mechanical analysis, and dielectric spectroscopy to measure lambda, storage and loss moduli, dielectric permittivity, and volume resistivity. Moreover, morphological investigations by scanning electron microscopy were performed to confirm the particle dispersion into the epoxy matrix. The results show that both the elastic modulus and glass-transition temperature increased with particle content. An enhancement of lambda was also observed at high filler contents because of the formation of heat conductive pathways within the matrix. The nanocomposites' relative permittivity at 50 Hz was lower, whereas the dielectric loss was slightly higher compared with that of the neat epoxy matrix. A decrease in the relative permittivity with increasing frequency, both for the unfilled epoxy resin and epoxy-nanocomposites, was observed. (C) 2011 Wiley Periodicals, Inc. J Appl Polym Sci 122: 3686-3693, 2011
引用
收藏
页码:3686 / 3693
页数:8
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