Gilman J W, Woodcock Jeremiah, Fox Douglas
Materials Science and Engineering Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA.
Department of Chemistry, American University, Washington, DC, USA.
ECS Trans. 2016;75(15). doi: 10.1149/07515.0045ecst.
Ionic liquids, and the novel cations and anions which they are comprised of, have been used to modify the properties of many classes of materials. This includes their use as co-solvents and co-catalysts in simple chemical reactions. However, ionic liquid cations and anions have also been used to improve the properties and processing of nanomaterials as well. This paper will present recent efforts utilizing ionic liquid cations to dramatically improve the properties of cellulose nanocrystals (CNCs) such as water sensitivity, thermal stability, dispersibility, and polymer-miscibility. This is accomplished via a classic continuous, industrial process using ion-exchange resin. Novel measurement methods, used to characterize the impact of these cations on the CNC properties such as dynamic vapor desorption (DVS), optical imaging and inverse gas chromatography (iGC), will also be presented.
离子液体以及构成它们的新型阳离子和阴离子已被用于改变许多类材料的性质。这包括它们在简单化学反应中用作共溶剂和共催化剂。然而，离子液体的阳离子和阴离子也被用于改善纳米材料的性质和加工过程。本文将介绍利用离子液体阳离子显著改善纤维素纳米晶体（CNC）性质的最新研究成果，如对水的敏感性、热稳定性、分散性和与聚合物的混溶性。这是通过使用离子交换树脂的经典连续工业过程实现的。还将介绍用于表征这些阳离子对CNC性质影响的新型测量方法，如动态蒸汽吸附（DVS）、光学成像和反相气相色谱（iGC）。
