Dispersion and Filtration of Carbon Nanotubes (CNTs) and Measurement of Nanoparticle Agglomerates in Diesel Exhaust.
Dispersion and Filtration of Carbon Nanotubes (CNTs) and Measurement of Nanoparticle Agglomerates in Diesel Exhaust.
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DOI：
10.1016/j.ces.2011.12.045
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发表时间：
2013-01-14
影响因子：
4.7
通讯作者：
Pui DY
中科院分区：
文献类型：
--
作者：
Wang J;Pui DY
碳纳米管由于其几何形状和货车德瓦尔斯力的作用而易于形成束，这通常使碳纳米管性质的研究变得复杂。分散在碳纳米管的研究中起着重要的作用，我们总结了分散技术，以产生空气中的碳纳米管从悬浮液或粉末。我们详细描述了我们的CNT雾化技术与控制程度的团聚使用电喷雾系统。使用电喷雾碳纳米管的动物吸入研究的结果。我们通过丝网过滤器对碳纳米管进行了过滤实验。建立了一个数值模型来模拟碳纳米管过滤实验。模拟和实验结果均表明，碳纳米管的穿透能力小于相同迁移率直径的球体，这主要是由于碳纳米管的拦截长度较大。需要能够快速和在线测量气态纳米颗粒团聚体的仪器。本文介绍了自行研制的通用纳米颗粒分析仪（UNPA）对柴油机排气微粒的测量结果。这里给出的结果是相关的非球形气溶胶粒子，并说明粒子形态对气溶胶行为的影响。
Carbon nanotubes (CNTs) tend to form bundles due to their geometry and van der Walls forces, which usually complicates studies of the CNT properties. Dispersion plays a significant role in CNT studies and we summarize dispersion techniques to generate airborne CNTs from suspensions or powders. We describe in detail our technique of CNT aerosolization with controlled degree of agglomeration using an electrospray system. The results of animal inhalation studies using the electrosprayed CNTs are presented. We have performed filtration experiments for CNTs through a screen filter. A numerical model has been established to simulate the CNT filtration experiments. Both the modeling and experimental results show that the CNT penetration is less than the penetration for a sphere with the same mobility diameter, which is mainly due to the larger interception length of the CNTs. There is a need for instruments capable of fast and online measurement of gas-borne nanoparticle agglomerates. We developed an instrument Universal NanoParticle Analyzer (UNPA) and the measurement results for diesel exhaust particulates are presented. The results presented here are pertinent to non-spherical aerosol particles, and illustrate the effects of particle morphology on aerosol behaviors.
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DOI：
10.1080/15459620500444046
发表时间：
2006-01-01
影响因子：
2
作者：
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影响因子：
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