摘要
Inorganic nanotubes of tungsten disulfide （INTs-WS2） are insoluble in common solvents and practically inert, hindering their usefulness in both research and commercial applications. The covalent attachment of functional species onto the surface of INT-WS2 is a critical first step in realizing the potential that INT-WS2 offer for high-performance materials and products. Although a few attempts have been reported regarding preparing modified nanotubes, only a limited range of surface functionalities is possible with these methods. We have developed a versatile method, based on a modified, highly electrophilic acidic Vilsmeier- Haack reagent, to produce covalently bonded, polycarboxylated functional WS2 nanotubes that are dispersible in polar liquids, including water. The surface polycarboxylated shell provides a means for additional derivatization, enabling matching compatibility of derivatized nanotubes to both hydrophobic and hydrophilic materials. Nanocomposites incorporating derivatized INT-WS2 are expected to show improved properties as a result of enhanced interfacial compatibility, made possible by the large number of classes of functionalization available through the initial polycarboxylation step.
钨二硫化物的无机的 nanotubes (INTs-WS < 潜水艇 class= “ a-plus-plus ” > 2 </sub>) 在普通溶剂并且实际上是不可溶解的惰性，在研究和商业应用妨碍他们的实用性。功能的种类的共有原子价附件到 INT-WS 的表面上 < 潜水艇 class= “ a-plus-plus ” > 2 </sub> 是一批评首先在认识到潜力走那 INT-WS < 潜水艇 class= “ a-plus-plus ” > 为高效的材料和产品的 2 </sub> 提议。尽管一些尝试关于准备修改 nanotubes 被报导了，仅仅表面功能的一个有限范围与这些方法是可能的。我们开发了一个万用的方法，基于一修改，高度 electrophilic 酸的 Vilsmeier-Haack 试剂，结合了 covalently 生产， polycarboxylated 功能的 WS < 潜水艇 class= “ a-plus-plus ” > 在极的液体是可分散的 2 </sub> nanotubes，包括水。表面 polycarboxylated 壳为另外的 derivatization 提供一个工具，启用到恐水病、吸水的材料的 derivatized nanotubes 的匹配的相容性。Nanocomposites 合并 derivatized INT-WS < 潜水艇 class= “ a-plus-plus ” > 2 </sub> 被期望由于提高的界面的相容性显示出改进性质，由通过起始的 polycarboxylation 步可得到的 functionalization 的班的大数字成为可能。
