摘要
以多胺小分子二乙烯三胺(DETA)为还原剂和结构增强剂,采用水热还原法,制备了具有三维交联网络结构的高弹性石墨烯气凝胶(GA)。通过X射线衍射仪(XRD)、四探针测试仪、扫描电子显微镜(SEM)、万能拉力机和吸附实验等手段对GA的微观结构和性能进行了表征和测试。研究了氧化石墨烯(GO)和DETA的质量浓度对GA性能的影响。结果表明:GA的密度和导电率随着GO和DETA的质量浓度变化而变化,压缩强度随着GO和DETA质量浓度的升高而增大。当GO的质量浓度为8mg/mL,GO与DETA的质量浓度之比为1 000∶7.5时,其最大压缩强度高达6.8 MPa。GA被压缩后,其形貌可基本完全回复,表现出较好的抗疲劳性能。GA对7种常见有机溶剂的吸附量为自身质量的41~83倍,其中对二氯甲烷的吸附量最大,达到了自身质量的83倍。
Triethylenediamine(DETA)was used as a reducing agent and structural enhancer to prepare ultra-elastic graphene aerogel(GA)by means of hydrothermal reduction method.The realationship between the properties of GA and the mass concentrations of GO and DETA were studied.The microstructures and properties of GA were characterized by X-ray diffraction(XRD),four-point probe,scanning electron microscopy(SEM),universal tensile testing machine and absorption measurement,respectively.The density and conductivity of GA vary with mass concentrations ratio of GO to DETA.The compressive strength increases with increasing mass concentrations ratio of GO to DETA.The maximum compressive strength is up to 6.8 MPa when the concentration of GO reaches 8 mg/mL and the mass concentration ratio of GO to DETA keeps at 1 000∶7.5.Besides,GA can recover its shape completely after compression,showing good anti-fragile performance.As confirmed from the brightness of Light-Emitting Diode(LED)light,the larger compression strain was,the better conductivity would achieve.In addition,absorption behavior of GA towards seven organic solvents was studied.It is presented that GA could absorb these liquids at 41 to 83 times of its own mass requiring no further pretreatment,showing highly efficient absorption feature of organic solvents.
作者
汪利娜
张弛道
王新灵
郑震
WANG Li-na;ZHANG Chi-dao;WANG Xin-ling;ZHENG Zhen(State Key Laboratory of Metal Matrix Composites,School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University,Shanghai 200240,China)
出处
《功能高分子学报》
CAS
CSCD
北大核心
2018年第5期462-467,共6页
Journal of Functional Polymers
关键词
石墨烯气凝胶
二乙烯三胺
水热还原
压缩
吸附
graphene aerogel
diethylenetriamine
hydrothermal reduction
compression
absorption
