Preparation and Properties of Polymer-grafted Carbon Nanotubes and Nanofibers
Preparation and Properties of Polymer-grafted Carbon Nanotubes and Nanofibers
复制标题
DOI：
10.1295/polymj.37.637
复制
发表时间：
2005-09
期刊：
影响因子：
2.8
通讯作者：
N. Tsubokawa
中科院分区：
文献类型：
--
作者：
N. Tsubokawa
综述了碳纳米管(CNT)和气相生长碳纤维(VGCF)等纳米纤维表面接枝聚合物的研究进展。通过(1)“接枝”法、(2)“聚合物反应”法、(3)“接枝自”法和(4)树枝状大分子合成方法实现了聚合物在这些表面上的接枝。对于聚合物的接枝，使用先前通过硝酸氧化引入表面的羧基和酚羟基等表面官能团作为接枝点。将这些官能团转化为不同的引发基，实现了表面引发接枝聚合。以碳纳米管和VGCF的石墨烯片状(多聚芳环)为接枝点，与含二茂铁基团的聚合物进行配体交换反应。利用碳纳米管和VGCF表面的自由基捕获性进行聚合物的接枝。通过在碳纳米管和VGCF表面接枝聚合物，显著提高了接枝聚合物在溶剂中的分散性。讨论了聚合物接枝碳纳米管和VGCF复合材料的电阻对溶剂、蒸汽和温度的响应。
Recent advances in surface grafting of polymers onto carbon nanotubes (CNT) and nanofibers, such as vapor grown carbon fiber (VGCF), are reviewed. The grafting of polymers onto these surfaces was achieved by (1) the “grafting onto” method, (2) “polymer reaction” method, (3) “grafting from” method, and (4) “stepwise growth” method by dendrimer synthesis methodology. For the grafting of polymers, surface functional groups, such as carboxyl and phenolic hydroxyl groups, previously introduced onto the surface by oxidation with nitric acid, were used as grafting sites. These functional groups were converted into various initiating groups and surface initiated graft polymerization was achieved. The graphene sheet (polycondensed aromatic rings) of CNT and VGCF were used as grafting sites by using ligand-exchange reaction with polymers containing ferrocene moieties. The radical trapping nature of CNT and VGCF surface was used for the grafting of polymers. Dispersibility in solvents for good solvents of grafted polymer was remarkably improved by the surface grafting of polymers onto CNT and VGCF surfaces. The response of electric resistance of the composite prepared from polymer-grafted CNT and VGCF to solvent vapor and temperature is discussed.