PVP-assisted synthesis of dense silica-coated graphite with electrically insulating property

被引：22

作者：

Choi, Seongcheol ^{[1
]}

Kim, Yeongseon ^{[1
]}

Yun, Ju Ho ^{[2
]}

Kim, Il ^{[3
]}

Shim, Sang Eun ^{[1
]}

机构：

[1] Inha Univ, Dept Chem Engn, Inchon 402751, South Korea

[2] Korea Automot Technol Inst, Enviromn Mat & Components R&D Ctr, Chonan Si 330912, Chungnam, South Korea

[3] Pusan Natl Univ, Dept Polymer Sci & Engn, Pusan 609735, South Korea

来源：

MATERIALS LETTERS | 2013年 / 90卷

关键词：

Graphite; Silica; Sol-gel; Coating; Electrical insulation; SURFACE-AREA;

D O I：

10.1016/j.matlet.2012.09.035

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In order to endow graphite with an electrical insulating property, graphite flakes were coated with dense amorphous silica by polyvinylpyrrolidone (PVP) as a coupling agent between graphite and silica. First. PVP was physically adsorbed on graphite in water. Later on, silica layers were grown on the PVP-adsorbed graphite by a basic sol-gel reaction of tetraethyl orthosilicate (TEOS) in ethanol, resulting in dense amorphous silica-coated graphite. This silica-coated graphite is categorized as an electrical insulator with a high surface resistivity (2.14 x 10(12) Omega/sq), originating from very high surface coverage of the silica on the graphite. (c) 2012 Elsevier B.V. All rights reserved.

引用

页码：87 / 89

页数：3

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