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[1]岳晨午,冯坚,姜勇刚,等.N杂化石墨烯气凝胶的组成和热导率[J].南京工业大学学报(自然科学版),2016,38(02):1-6.[doi:10.3969/j.issn.1671-7627.2016.02.001]
 YUE Chenwu,FENG Jian,JIANG Yonggang,et al.Composition and thermal conductivity of N-doped graphene aerogel[J].Journal of NANJING TECH UNIVERSITY(NATURAL SCIENCE EDITION),2016,38(02):1-6.[doi:10.3969/j.issn.1671-7627.2016.02.001]
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N杂化石墨烯气凝胶的组成和热导率()
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《南京工业大学学报(自然科学版)》[ISSN:1671-7627/CN:32-1670/N]

卷:
38
期数:
2016年02期
页码:
1-6
栏目:
出版日期:
2016-04-10

文章信息/Info

Title:
Composition and thermal conductivity of N-doped graphene aerogel
文章编号:
1671-7627(2016)02-0001-06
作者:
岳晨午冯坚姜勇刚冯军宗
国防科学技术大学 新型陶瓷纤维及其复合材料重点实验室,湖南 长沙 410073
Author(s):
YUE ChenwuFENG JianJIANG YonggangFENG Junzong
Science and Technology on Advanced Ceramic Fibers and Composites Laboratory, National University of Defense Technology,Changsha 410073,China
关键词:
裂解 杂化 石墨烯 气凝胶 热导率
Keywords:
pyrolysis doped graphene aerogel thermal conductivity
分类号:
TB32
DOI:
10.3969/j.issn.1671-7627.2016.02.001
文献标志码:
A
摘要:
通过对苯二胺还原和CO2超临界干燥制备N杂化石墨烯气凝胶。采用X线光电子能谱仪(XPS)、场发射扫描电子显微镜(FESEM)、N2吸附仪和热常数分析仪表征样品在1 000 ℃裂解前后的微观结构、组成和热导率变化。结果表明:裂解后N杂化石墨烯气凝胶孔径增大,石墨烯上的杂化原子部分去除,常压和低压(5 Pa)热导率分别由0.031和0.014 W/(m·K)增大到0.057和0.019 W/(m·K)。裂解后气态热导是N杂化石墨烯气凝胶传热的主要方式。
Abstract:
N-doped graphene aerogel with paraphenylene diamine as reducing agent was prepared by CO2 supercritical drying.The differences among microstructure,composition and thermal conductivity of N-doped graphene aerogel with and without pyrolysis at 1 000 ℃ were investigated by X-ray photoelectron spectroscopy(XPS), filed emission scanning electron microscopy(FESEM), N2 adsorption analyzer, and hotdisk apparatus.Results showed that with pyrolysis the pore size became larger.With N atoms getting into the graphene,some doped atoms were removed from graphene.During pyrolysis,the thermal conductivity at atmospheric pressure and that at 5 Pa increased from 0.031 and 0.014 W/(m·K)to 0.057 and 0.019 W/(m·K),respectively.The gaseous thermal conductivity of N-doped graphene aerogel with pyrolysis accounted for the greater part of the total thermal conductivity.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2015-10-20
基金项目:国家自然科学基金(51172279,51302317); 湖南省高校科技创新团队支持计划; 国防科学技术大学陶瓷纤维与复合材料技术创新群体
作者简介:岳晨午(1990—),男,河北宁晋人,博士生,主要研究方向为纳米气凝胶材料; 冯坚(联系人),研究员,E-mail:fengj@nudt.edu.cn.
引用本文:岳晨午,冯坚,姜勇刚,等.N杂化石墨烯气凝胶的组成和热导率[J].南京工业大学学报(自然科学版),2016,38(2):1-6..
更新日期/Last Update: 2016-03-20