Dispersability and particle size distribution of CNTs in an aqueous surfactant dispersion as a function of ultrasonic treatment time
Dispersability and particle size distribution of CNTs in an aqueous surfactant dispersion as a function of ultrasonic treatment time
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DOI：
10.1016/j.carbon.2010.04.002
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发表时间：
2010-08-01
期刊：
影响因子：
10.9
通讯作者：
Petzold, Gudrun
中科院分区：
文献类型：
--
作者：
Krause, Beate;Mende, Mandy;Petzold, Gudrun
通过使用LUMiSizer（R）装置在离心力下研究分散在表面活性剂水溶液中的CNT在不同超声处理时间下的沉降来评估碳纳米管（CNT）的分散性。比较了不同的市售多壁CNT，即Baytubes（R）C150 P、Nanocyl（TM）NC 7000、Arkema Graphistrength（R）C100和FutureCarbon CNT-MW，它们显示出非常不同的动力学。此外，使用动态光散射和离心分离分析来分析粒度分布。发现Nanocyl（TM）NC 7000和FutureCarbon CNT-MW的分散性最好;为了制备Baytubes（R）C150 P或Graphistrength（R）C100的稳定分散体，需要五倍的能量。作为离心分离分析的结果，可以得出结论，Nanocyl TM NC 7000和Baytubes C150 P使用超声处理分散为单个纳米管，而在含有FutureCarbon CNT-MW和Graphistrength C100的分散体中存在小的附聚物或束。(C)2010爱思唯尔有限公司版权所有。
The dispersability of carbon nanotubes (CNTs) was assessed by studying the sedimentation of CNTs dispersed in aqueous surfactant solutions at different ultrasonication treatment times using a LUMiSizer (R) apparatus under centrifugal forces. Different commercially available multiwalled CNTs, namely Baytubes (R) C150P, Nanocyl (TM) NC7000, Arkema Graphistrength (R) C100, and FutureCarbon CNT-MW showing quite different kinetics were compared. In addition, the particle size distributions were analyzed using dynamic light scattering and centrifugal separation analysis. The best dispersabilities were found for Nanocyl (TM) NC7000 and FutureCarbon CNT-MW; to prepare stable dispersions of Baytubes (R) C150P or Graphistrength (R) C100 five times the energy was needed. As a result of the centrifugal separation analysis, it was concluded that Nanocyl (TM) NC7000 and Baytubes (R) C150P were dispersed as single nanotubes using ultrasonic treatment whereas small agglomerates or bundles are existing in dispersions containing FutureCarbon CNT-MW and Graphistrength (R) C100. (C) 2010 Elsevier Ltd. All rights reserved.