Preparation and evaluation of a polymeric gel containing ionic liquid-functionalized MWCNTs as a novel class of organic solvent absorbent

Abstract

Multiwalled carbon nanotubes grafted with vinyl immidazolium‐based ionic liquid (MWCNT‐IL) were synthesized and utilized as a crosslinking agent for the preparation and evaluation of a polymeric gel as a new class of organic solvent absorbent. Based on our earlier organic solvent‐absorbents, the present polymeric gel exhibited high organic solvent absorbency, fast organic solvent absorption rate, and good reusability. To prepare such polymeric gel, radical polymerization was carried out with dodecyl methacrylate and butyl acrylate as comonomers, MWCNT‐ILs as crosslinking agent, and azoisobutyronitrile as initiator, providing polymeric gel in a quantitative yield. The polymeric gel synthesized under the optimized polymerization conditions absorbed 79 times the dry weight in CCl4, 57 times in toluene, 96 in CHCl3, and 100 times in CH2Cl2. The reusability of the prepared‐polymeric gel was also checked which established that the gels could be recycled and reused for at least 10 times. © 2014 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2014, 52, 3166–3172

Cobalt nanoparticles supported on ionic liquid‐functionalized multiwall carbon nanotubes as an efficient and recyclable catalyst for Heck reaction

“…) clearly show round Co present at moderately high density and with fairly even, non‐ordered distribution along the walls and at the ends of nanotubes. Very similar morphology observations have been previously reported . Inductively coupled plasma atomic adsorption emission (ICP‐OES) analyses indicate 55.3 wt% of Co is deposited onto the Co‐IL‐MWCNT corresponding to 87.8% of the Co used.…”

“…The measurements were carried out in the range 30–800°C with a ramp of 10°C min −1 in air. The catalyst sample decomposes in two major steps . It is observed that adsorbed IL starts to degrade at a lower temperature compared to neat IL, which may be due to changes in the IL structure as a result of the interaction with CNTs and the presence of Co NPs on CNT surface .…”