Title of article :
Investigations about dissolution of cellulose in the 1-allyl-3-alkylimidazolium chloride ionic liquids
Author/Authors :
Liu، نويسنده , , De-tao and Xia، نويسنده , , Kun-feng and Cai، نويسنده , , Weihua and Yang، نويسنده , , Ren-dang and Wang، نويسنده , , Liqin and Wang، نويسنده , , Bin، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2012
Abstract :
In this work, the 1-allyl-3-alkylimidazolium chloride ionic liquids were synthesized and characterized by increasing carbon atoms (n ≤ 6) of alkyl chains on a cationic 3-imidazole ring. The results indicated that 1-allyl-3-alkylimidazolium chloride with asymmetrical structure on the two sides of a cationic 3-imidazole ring (i.e., n = 1, 2, 6) exhibited alkalinity and lower thermal stabilities, and showed better solubility to the cellulose samples at 60–120 °C than those with symmetrical structures (n = 3, 4). The cellulose samples treated by 20% (w/w) ethylenediamine solution showed better solubility in 1-allyl-3-ethyl, hexyl-imidazolium chloride ionic liquids than that treated with 20% (w/w) NaOH solution at 5 °C for 72 h. XRD and TG analysis indicated that 0 0 2 plane apparent crystallite size as well as thermal stability of the regenerated cellulose samples from the ionic liquids decreased significantly compared with the untreated cellulose samples.
Keywords :
Carbon atom , Regenerated cellulose , Cellulose dissolution , 1-Allyl-3-alkylimidazolium chloride ionic liquids
Journal title :
CARBOHYDRATE POLYMERS
Journal title :
CARBOHYDRATE POLYMERS