原位自组装石墨烯块体材料:性质、结构及pH依赖自组装行为

王刚; 贾丽涛; 侯博; 李德宝; 王俊刚; 孙予罕

doi:10.1016/S1872-5805(15)60173-1

原位自组装石墨烯块体材料:性质、结构及pH依赖自组装行为

doi: 10.1016/S1872-5805(15)60173-1

1.
中国科学院山西煤炭化学研究所煤转化国家重点实验室, 山西太原030001;
2.
中国科学院大学, 北京100049

基金项目: 国家自然科学基金(21003149,21076218).

详细信息

作者简介:
王刚,博士研究生.E-mail:wanggang@sxicc.ac.cn

通讯作者:
孙予罕,研究员.E-mail:yhsun@sxicc.ac.cn;贾丽涛,副研究员.E-mail:jialitao910@163.com

中图分类号: TQ127.1⁺1
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- 被引次数: 0
出版历程
- 收稿日期: 2014-10-20
- 录用日期: 2015-02-13
- 修回日期: 2015-01-29
- 刊出日期: 2015-02-28

Self-assembled graphene monoliths: properties, structures and their pH-dependent self-assembly behavior

1.
State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China;
2.
University of Chinese Academy of Sciences, Beijing 100049, China

Funds: National Natural Science Foundation of China (21003149, 21076218).

摘要

摘要: 通过水热法自组装制备出块体石墨烯水凝胶材料,其具有优异的机械性能和弹性;同时发现在调节水凝胶机械性能方面,控制反应的pH值要比常规的反应时间和反应物的浓度更有效。其次,系统研究了石墨烯水凝胶的结构-性能关系和自组装行为。研究发现,在水热条件下,石墨烯具有pH值依赖自组装行为。其中,石墨烯所含羧酸基团在不同pH值下的电离状态有所不同,进而导致石墨烯自组装行为的差异。将石墨烯独特的组装行为与其分子结构和胶体相互作用相互关联,对于设计新型的、多功能的、良好机械性能的石墨烯结构具有重要指导作用。
- 石墨烯结构 /
- 石墨烯水凝胶 /
- 石墨烯骨架 /
- 三维 /
- 自组装 /
- 构效关系
Abstract: Fabricating self-supporting, three dimensional graphene macroscopic structures from two dimensional graphene sheets by self-assembly has been an intriguing subject in exploring the performance of graphene structures for practical advanced applications. Monolithic graphene hydrogels (GHs) with quite good mechanical properties and excellent resilience were self-assembled from graphene oxide (GO) dispersions under hydrothermal conditions by changing the pH value. The structure-property relationships and the self-assembly behavior of GHs were investigated. It was found that the formation of GHs was pH-dependent. The charge state of carboxyl groups on the graphene was the key factor that influenced the balance of attraction and repulsion interactions of the GO and consequently determined the self-assembly behavior. Both the graphene molecular structure and colloidal interactions were correlated with the unique self-assembly behavior, which can be used to design graphene arrangements with various structures, functions and mechanical properties. This method is superior to the conventional method that adjusts the concentration and reduction time of the GO dispersion.
- Graphene architectures /
- Graphene hydrogels /
- Graphene framework /
- Three-dimension /
- Self-assembly /
- Structure-activity

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