Preparation and insulation properties of epoxy-layered silicate nanocomposite [insulating material applications]

Herein, we report the insulation properties of an epoxy-layered silicate nanocomposite, prepared by dispersing modified layered silicates in an epoxy resin. This nanocomposite has an intercalated structure formed by the insertion of resin molecules into the spaces between each silicate layer, and it has higher insulation breakdown strength than that of an epoxy resin without layered silicate fillers. The electrical treeing progress, with many branches, in the nanocomposite seemed to result in an increase in insulation breakdown strength. These results suggest the possibility of their application as insulating materials in heavy apparatus.

[1]  Yang Cao,et al.  The electrical conduction in polyimide nanocomposites , 2003, 2003 Annual Report Conference on Electrical Insulation and Dielectric Phenomena.

[2]  D. Tu,et al.  Effect of space charge in nanocomposite of LDPE/TiO/sub 2/ , 2003, Proceedings of the 7th International Conference on Properties and Applications of Dielectric Materials (Cat. No.03CH37417).

[3]  A. Terauchi,et al.  Phase structure and mechanical and adhesion properties of epoxy/silica hybrids , 2001 .

[4]  Lee Wook Jang,et al.  Preparation and Characterization of PMMA-Clay Hybrid Composite by Emulsion Polymerization , 1996 .

[5]  T. Pinnavaia,et al.  Clay-Reinforced Epoxy Nanocomposites , 1994 .

[6]  Y. Ohki,et al.  Surface change of polyamide nanocomposite caused by partial discharges , 2003, 2003 Annual Report Conference on Electrical Insulation and Dielectric Phenomena.

[7]  T. Dakin.  Application of Epoxy Resins in Electrical Apparatus , 1974, IEEE Transactions on Electrical Insulation.

[8]  P. Messersmith,et al.  Synthesis and Characterization of Layered Silicate-Epoxy Nanocomposites , 1994 .

[9]  R. Vaia,et al.  Thermoset-Layered Silicate Nanocomposites. Quaternary Ammonium Montmorillonite with Primary Diamine Cured Epoxies , 2000 .

[10]  Chan Eon Park,et al.  Real Time Exfoliation Behavior of Clay Layers in Epoxy−Clay Nanocomposites , 2003 .

[11]  C. A. Wilkie,et al.  A Comparison of Various Methods for the Preparation of Polystyrene and Poly(methyl methacrylate) Clay Nanocomposites , 2002 .

[12]  Linda S. Schadler,et al.  Thermal and mechanical properties of polyimide nanocomposites , 2003, 2003 Annual Report Conference on Electrical Insulation and Dielectric Phenomena.

[13]  Thomas J. Pinnavaia,et al.  Hybrid Organic−Inorganic Nanocomposites: Exfoliation of Magadiite Nanolayers in an Elastomeric Epoxy Polymer , 1998 .

[14]  G. Montanari,et al.  Electrical properties of polymer nanocomposites based upon organophilic layered silicates , 2003, 2003 Annual Report Conference on Electrical Insulation and Dielectric Phenomena.

[15]  I. Chung,et al.  Synthesis of Exfoliated PS/Na−MMT Nanocomposites via Emulsion Polymerization , 2002 .

[16]  T. Kurauchi,et al.  Synthesis and properties of polyimide–clay hybrid , 1993 .

[17]  R. Mülhaupt,et al.  Morphology and toughness/stiffness balance of nanocomposites based upon anhydride‐cured epoxy resins and layered silicates , 1999 .