Dispersion of single walled carbon nanotubes in organogels by incorporation into organogel fibers.
Dispersion of single walled carbon nanotubes in organogels by incorporation into organogel fibers.
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DOI：
10.1016/j.jcis.2010.08.025
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发表时间：
2010-12
影响因子：
9.9
通讯作者：
H. Oh;B. Jung;Hyun Lee;J. Chang
中科院分区：
文献类型：
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作者：
H. Oh;B. Jung;Hyun Lee;J. Chang
我们制备了杂化有机凝胶，其中单壁碳纳米管（SWNTs）被纳入有机凝胶纤维。单壁碳纳米管共价官能化的有机分支，具有类似的结构的有机胶凝剂。研究了碳纳米管（CNTs）、有机凝胶剂和溶剂分子之间的相对相互作用对杂化有机凝胶结构的影响。以3，4，5-三（癸氧基）苯甲酸和1，8-二氨基辛烷为原料合成了化合物1和2，分别作为单壁碳纳米管的有机胶凝剂和功能基团。有机胶凝剂1对烷烃和醇类具有良好的胶凝能力。原始SWNT被酸氧化以产生羧酸基团，并使用亚硫酰氯与化合物2共价官能化。在癸烷和N，N-二甲基甲酰胺（DMF）中制备化合物1与官能化SWNT（f-SWNT）的杂化有机凝胶。透射电子显微镜（TEM）图像显示，在癸烷中形成的杂化有机凝胶中的f-SWNTs主要位于有机凝胶纤维的内部或表面，而在DMF中形成的杂化有机凝胶中的f-SWNTs均匀地分布在样品上。当有机凝胶剂具有与单壁碳纳米管表面上的有机官能团不同的化学结构时，单壁碳纳米管作为大的聚集体或长束存在，其不被并入有机凝胶纤维的内部。
We prepared hybrid organogels, where single walled carbon nanotubes (SWNTs) were incorporated into organogel fibers. The SWNTs were covalently functionalized with organic branches that had a similar structure to the organogelator. The effect of relative interactions between the carbon nanotubes (CNTs), organogelator, and solvent molecules on the hybrid organogel structure was investigated. Compounds 1 and 2 were synthesized from 3,4,5-tris(decyloxy)benzoic acid and 1,8-diaminooctane, as an organogelator and a functional group for SWNTs, respectively. Organogelator 1 showed excellent ability to gelate alkanes and alcohols. The pristine SWNTs were oxidized by acids to create carboxylic acid groups and functionalized covalently with compound 2 using thionyl chloride. Hybrid organogels of compound 1 with functionalized SWNTs (f-SWNTs) were prepared in decane and N,N-dimethylformamide (DMF). Transmission electron microscopy (TEM) images showed that the f-SWNTs in the hybrid organogel formed in decane were mainly located inside or on the surface of the organogel fibers, while the f-SWNTs in the hybrid organogel formed in DMF were distributed evenly over the sample. When an organogelator had a different chemical structure to that of an organic functional group on the SWNT surface, SWNTs existed as large aggregates, or long bundles, which were not incorporated inside of the organogel fibers.