期刊
MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS
卷 20, 期 1, 页码 53-61出版社
UNIV FED SAO CARLOS, DEPT ENGENHARIA MATERIALS
DOI: 10.1590/1980-5373-MR-2015-0528
关键词
Graphene oxide; few layer graphene; graphite; graphene
资金
- CNPq
- CAPES
- FAPERGS
This work aimed to produce graphene oxide with few graphene layers, a low number of defects, good conductivity and reasonable amount of oxygen, adequate for use as filler in polymeric composites. Two starting materials were evaluated: expanded graphite and graphite flakes. The method of oxidation used was the Staudenmaier one, which was tested over different lengths of time. No appreciable differences were found among the oxidation times and so the lowest oxidation time (24 h) was chosen as the most adequate. An investigation was also conducted into suitable temperatures for the reduction of graphite oxide. A temperature of 1000 degrees C gave the best results, allowing a good quality material with few defects to be obtained. The reduction was also evaluated under inert and normal atmosphere. The best results were obtained when the least modified material, e.g., graphite flakes, was used as a starting material, oxidized for 24h and reduced at 1000 degrees C for 30 s in a quartz ampoule under a normal atmosphere.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据