Soulié-Ziakovic Corinne, Nicolaÿ Renaud, Prevoteau Alexandre, Leibler Ludwik
Matière Molle et Chimie, UMR 7167-ESPCI-ParisTech, 10 rue Vauquelin, 75005 Paris (France), Fax: (+33) 1-40795117.
Chemistry. 2014 Jan 27;20(5):1210-7. doi: 10.1002/chem.201303818. Epub 2013 Dec 20.
A method is proposed to produce nanoparticles dispersible and recyclable in any class of solvents, and the concept is illustrated with the carbon nanotubes. Classically, dispersions of CNTs can be achieved through steric stabilization induced by adsorbed or grafted polymer chains. Yet, the surface modification of CNTs surfaces is irreversible, and the chemical nature of the polymer chains imposes the range of solvents in which CNTs can be dispersed. To address this limitation, supramolecular bonds can be used to attach and to detach polymer chains from the surface of CNTs. The reversibility of supramolecular bonds offers an easy way to recycle CNTs as well as the possibility to disperse the same functional CNTs in any type of solvent, by simply adapting the chemical nature of the stabilizing chains to the dispersing medium. The concept of supramolecular functionalization can be applied to other particles, for example, silica or metal oxides, as well as to dispersing in polymer melts, films or coatings.
本文提出了一种制备可在任何类型溶剂中分散和循环利用的纳米颗粒的方法，并以碳纳米管为例对该概念进行了说明。传统上，碳纳米管的分散可通过吸附或接枝聚合物链诱导的空间稳定作用来实现。然而，碳纳米管表面的改性是不可逆的，并且聚合物链的化学性质决定了碳纳米管能够分散于其中的溶剂范围。为解决这一局限性，超分子键可用于将聚合物链连接到碳纳米管表面以及从碳纳米管表面分离。超分子键的可逆性为碳纳米管的循环利用提供了一种简便方法，并且通过简单地使稳定链的化学性质适应分散介质，还能够将相同的功能化碳纳米管分散于任何类型的溶剂中。超分子功能化的概念可应用于其他颗粒，例如二氧化硅或金属氧化物，以及用于在聚合物熔体、薄膜或涂层中的分散。
