Heat Dissipation of Transparent Graphene Defoggers

被引：273

作者：

Bae, Jung Jun ^{[1
]}

Lim, Seong Chu

Han, Gang Hee

Jo, Young Woo

Doung, Dinh Loc

Kim, Eun Sung

Chae, Seung Jin

Ta Quang Huy

Nguyen Van Luan

Lee, Young Hee

机构：

[1] Sungkyunkwan Univ SKKU, Phys Div BK21, Dept Energy Sci, Suwon 440746, South Korea

来源：

ADVANCED FUNCTIONAL MATERIALS | 2012年 / 22卷 / 22期

基金：

新加坡国家研究基金会;

关键词：

graphene; defoggers; heat transfer; heat dissipation; Joule heating; ENERGY-DISSIPATION; FILM HEATERS; CONDUCTION; MONOLAYER; SYSTEM;

D O I：

10.1002/adfm.201201155

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

In spite of recent successful demonstrations of flexible and transparent graphene heaters, the underlying heat-transfer mechanism is not understood due to the complexity of the heating system. Here, graphene/glass defoggers are fabricated and the dynamic response of the temperature as a function of input electrical power is measured. The graphene/glass defoggers reveal shorter response times than Cr/glass defoggers. Furthermore, the saturated temperature of the graphene/glass defoggers is higher than for Cr/glass defoggers at a given input electrical power. The observed dynamic response to temperature is well-fitted to the power-balance model. The response time of graphene/glass defogger is shorter by 44% than that of the Cr/glass defogger. The convective heat-transfer coefficient of graphene is 12.4 x 10-4 W cm-2 degrees C-1, similar to that of glass (11.1 x 10-4 W cm-2 degrees C-1) but smaller than that of chromium (17.1 x 10-4 W cm-2 degrees C-1). The graphene-based system reveals the lowest convective heat-transfer coefficient due to its ideal flat surface compared to its counterparts of carbon nanotubes (CNTs) and reduced graphene oxide (RGO)-based systems.

引用

页码：4819 / 4826

页数：8

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