Enhancing the Thermal Stability of Carbon Nanomaterials with DNA
Enhancing the Thermal Stability of Carbon Nanomaterials with DNA
复制标题
利用 DNA 增强碳纳米材料的热稳定性
DOI：
10.1038/s41598-019-48449-x
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发表时间：
2019
影响因子：
4.6
通讯作者：
Roxbury, Daniel
中科院分区：
文献类型：
--
作者：
Safaee, Mohammad Moein;Gravely, Mitchell;Lamothe, Adeline;McSweeney, Megan;Roxbury, Daniel
单壁碳纳米管（SWCNT）最近被用作填料，可以降低复合材料的可燃性并提高强度和导热性。当这些材料应用于高温应用时，增强单壁碳纳米管的热稳定性至关重要。在许多情况下，单壁碳纳米管应用于具有对生物体有毒的表面涂层的复合材料。另外，单链 DNA（一种天然存在的生物聚合物）最近已被用来与 SWCNT 形成单分散的杂交体，并抑制其已知的毒理学效应。这些混合物在水悬浮液或干燥材料中均表现出无与伦比的稳定性。此外，由于在氧气存在下加热时会产生保护性炭，DNA 具有某些已记录的阻燃效果。在此，利用各种热重分析技术，我们发现单链DNA对SWCNT具有显着的阻燃效果，并有效增强其热稳定性。与 DNA 杂交导致纯化的 SWCNT 的热分解温度升高超过 200°C。我们将这一发现应用于其他碳纳米材料，包括多壁碳纳米管 (MWCNT)、还原氧化石墨烯 (RGO) 和富勒烯 (C60)，并在与 DNA 络合时显示出类似的效果。还探索了 SWCNT 的热分解速率，发现其很大程度上取决于所使用的 DNA 序列。
Single-walled carbon nanotubes (SWCNTs) have recently been utilized as fillers that reduce the flammability and enhance the strength and thermal conductivity of material composites. Enhancing the thermal stability of SWCNTs is crucial when these materials are applied to high temperature applications. In many instances, SWCNTs are applied to composites with surface coatings that are toxic to living organisms. Alternatively, single-stranded DNA, a naturally occurring biological polymer, has recently been utilized to form singly-dispersed hybrids with SWCNTs as well as suppress their known toxicological effects. These hybrids have shown unrivaled stabilities in both aqueous suspension or as a dried material. Furthermore, DNA has certain documented flame-retardant effects due to the creation of a protective char upon heating in the presence of oxygen. Herein, using various thermogravimetric analytical techniques, we find that single-stranded DNA has a significant flame-retardant effect on the SWCNTs, and effectively enhances their thermal stability. Hybridization with DNA results in the elevation of the thermal decomposition temperature of purified SWCNTs in excess of 200 °C. We translate this finding to other carbon nanomaterials including multi-walled carbon nanotubes (MWCNTs), reduced graphene oxide (RGO) and fullerene (C60), and show similar effects upon complexation with DNA. The rate of thermal decomposition of the SWCNTs was also explored and found to significantly depend upon the sequence of DNA that was used.
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影响因子：
9.5
作者：
Jena PV;Safaee MM;Heller DA;Roxbury D
通讯作者：
Roxbury D
影响因子：
38.3
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影响因子：
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作者：
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通讯作者：
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影响因子：
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作者：
Gillen, Alice J.;Kupis-Rozmyslowicz, Justyna;Boghossian, Ardemis A.
通讯作者：
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影响因子：
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作者：
Zhenzi Li;Zhenyu Wu;Kang Li
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