Preparation and characterization of alkylated carbon nanotube/polyimide nanocomposites
Preparation and characterization of alkylated carbon nanotube/polyimide nanocomposites
复制标题
烷基化碳纳米管/聚酰亚胺纳米复合材料的制备及表征
DOI：
10.1002/pi.2568
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发表时间：
2009-05
影响因子：
3.2
通讯作者：
Zhang, Qinghua
中科院分区：
文献类型：
--
作者：
Zhao, Xin;Chen, Dajun;Li, Jing;Zhang, Qinghua
背景技术背景：碳纳米管在聚合物中难以分散，以及纳米填料与基体之间的弱相互作用阻碍了碳纳米管增强复合材料的发展。碳纳米管的有效分散对于在复合材料基体中形成功能性纳米管网络至关重要。
结果：多壁碳纳米管（MWNTs）被纳入到聚酰亚胺基体中产生MWNT/聚酰亚胺纳米复合材料。为了使MWNTs在基体中分散良好，从而提高纳米管与聚合物的界面结合力，通过十八烷基异氰酸酯与羧化MWNTs反应，将“支链”接枝到纳米管表面。将官能化的MWNTs悬浮在前体溶液中，并将分散体浇铸，然后干燥和酰亚胺化，得到MWNTs/聚酰亚胺纳米复合材料。
结论：功能化多壁碳纳米管在聚合物基体中呈均匀分散。功能化的多壁碳纳米管与聚酰亚胺基体之间存在较强的相互作用，使材料的热稳定性和力学性能得到了很大的提高。版权所有© 2009化学工业协会
BACKGROUND: The development of carbon nanotube-reinforced composites has been impeded by the difficult dispersion of the nanotubes in polymers and the weak interaction between the nanofiller and matrices. Efficient dispersion of carbon nanotubes is essential for the formation of a functional nanotube network in a composite matrix.
RESULTS: Multiwalled carbon nanotubes (MWNTs) were incorporated into a polyimide matrix to produce MWNT/polyimide nanocomposites. To disperse well the MWNTs in the matrix and thus improve the interfacial adhesion between the nanotubes and the polymer, ‘branches’ were grafted onto the surface of the nanotubes by reacting octadecyl isocyanate with carboxylated MWNTs. The functionalized MWNTs were suspended in a precursor solution, and the dispersion was cast, followed by drying and imidization to obtain MWNT/polyimide nanocomposites.
CONCLUSION: The functionalized MWNTs appear as a homogeneous dispersion in the polymer matrix. The thermal stability and the mechanical properties are greatly improved, which is attributed to the strong interactions between the functionalized MWNTs and the polyimide matrix. Copyright © 2009 Society of Chemical Industry
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