Synthesis of cellulose methylcarbonate in ionic liquids using dimethylcarbonate.
Dialkylcarbonates are viewed as low-cost, low-toxicity reagents, finding application in many areas of green chemistry. Homogeneous alkoxycarbonylation of cellulose was accomplished by applying dialkycarbonates (dimethyl and diethyl carbonate) in the ionic liquid-electrolyte trioctylphosphonium acetate ([P8881 ][OAc])/DMSO or 1-ethyl-3-methylimidazolium acetate ([emim][OAc]). Cellulose dialkylcarbonates with a moderate degree of substitution (DS∼1) are accessible via this procedure and cellulose methylcarbonate was thoroughly characterized for its chemical and physical properties after regeneration. This included HSQC & HMBC NMR, ATR-IR, molecular weight distribution, morphology, thermal properties, and barrier properties after film formation.
Chemistry Department, University of Helsinki, A I Virtasen Aukio 1, 00014 (Finland).
Sara R
SR
Labafzadeh
K Juhani
KJ
Helminen
Ilkka
I
Kilpeläinen
Alistair W T
AW
King
D002482:Cellulose / Q000031:analogs & derivatives / Q000138:chemical synthesis*; D060326:Chemistry Techniques, Synthetic; D005561:Formates / Q000737:chemistry*; D055772:Green Chemistry Technology; D052578:Ionic Liquids / Q000737:chemistry*
D005561:Formates; D052578:Ionic Liquids; D002482:Cellulose; C023025:methyl carbonate
carbonates; cellulose; dimethyl carbonate; ionic liquids