Preparation of cellulosic ion exchange fiber using an ionic liquid as reaction reagent and medium

Abstract

A cellulosic ion exchange fiber (CIEF) was prepared by using room-temperature ionic liquid 1-(3-chloro-2-hydroxypropyl)-3-methylimidazolium chloride as reaction reagent and medium. The results showed the degree of substitution of the CIEF was up to 0.78. The product was characterized by Fourier transform infrared spectrometry, thermogravimetric analysis, scanning electronic microscope. The thermal stability of the CIEF was over 200C. The adsorption experiments of CIEF for Cr(VI) were performed. The adsorption capacity of CIEF for Cr(VI) was found to be 196.1 mg g À1 at 30

Development of Greener Multi-Responsive Chitosan Biomaterials Doped with Biocompatible Ammonium Ionic Liquids

“…Ionic liquids (ILs) are organic salts, comprising a cation and an anion, which are liquids at temperatures below 100 °C. They have been presented as greener organic solvent alternatives mainly because of their good thermal stabilities, negligible vapor pressures, broad liquid ranges, tailor-made potentialities, and excellent dissolution capabilities (for organic/inorganic compounds and for natural polymers). − These properties make them suitable to be applied, for example, as plasticizers, catalysts, extraction solvents, and for the production of advanced polymeric materials . Because of their ionic nature, ILs also present a broad electrochemical window that justifies their recent use to improve the conductivity of various materials, especially polymers and polymer composites. − As examples, polymeric materials doped with ILs can be used as solid electrolytes in dye-sensitive solar cells for photovoltaic applications, and as electrochemical actuators. ,− …”

“…15−17 These properties make them suitable to be applied, for example, as plasticizers, 18 catalysts, 19 extraction solvents, 20 and for the production of advanced polymeric materials. 21 Because of their ionic nature, ILs also present a broad electrochemical window that justifies their recent use to improve the conductivity of various materials, especially polymers and polymer composites. 22−26 As examples, polymeric materials doped with ILs can be used as solid electrolytes in dye-sensitive solar cells for photovoltaic applications, 25 and as electrochemical actuators.…”