摘要
采用胺官能团对多壁碳纳米管进行功能化处理.首先对碳纳米管进行氧化处理,然后通过中和反应和氢键作用等与二聚乙二醇十八胺进行反应,制得碳纳米管衍生物,其中碳纳米管的含量达40%,计算表明大约每50个碳原子上含有1个有机分子二聚乙二醇十八胺.其在室温下为黏性液体,并且可以溶于不同的溶剂.
In traditional modified methods,the functionalized nanoparticles appear and behave like solids in the absence of solvents.In this paper,a new family of modified nanoparticles,which exhibit liquid-like behavior in the absence of solvents at room temperature,is prepared.The amine-functionalized multi-wall carbon nanotubes （MWNTs） derivative is obtained in a two-step process comprising of oxidation of the tubes with strong acid and then neutralization reaction and hydrogen bonding followed by a surface reaction with dipoly（ethylene glycol） octadecyl amine.The sample is investigated by Fourier transform-infrared spectrometer analysis （FTIR）,X-ray diffraction （XRD）,thermogravimetric analysis （TGA）,differential scanning calorimeter （DSC） and rheological analysis.As a result,the carboxyl and hydroxyl groups were found on the surface of MWNTs,when MWNTs were modified by strong acid. Dipoly（ethylene glycol） octadecyl amine is 40 wt% corresponding to the dense surface coverage of one modifying molecule per 50 carbon atoms of MWNTs.The material is a viscous liquid at room temperature with lower versatility and it can be dispersed in various solvents due to amphiphilic properties of the modifier molecule.Their dispersion,high thermal stability,low vapor pressure and ability to flow at low temperatures make them attractive as lubricants,plasticizers,or film-forming precursors.
出处
《高分子学报》
SCIE
CAS
CSCD
北大核心
2008年第12期1209-1213,共5页
Acta Polymerica Sinica
基金
陕西省自然基金(基金号2007E108)
西北工业大学引进高层次人才科研启动费
西北工业大学第二批基础研究基金资助项目(项目号NPU-FFR-W018105)
西北工业大学博士论文创新基金(基金号CX200816)
关键词
碳纳米管
二聚乙二醇十八胺
化学修饰
纳米流体
Carbon nanotubes, Dipoly（ethylene glycol） octadecyl amine, Chemical modification, Nanofluid
