ULTRASOUND-ASSISTED MODIFICATION OF BEET PULP CELLULOSE WITH PHTHALIC ANHYDRIDE IN IONIC LIQUID

作者：Ma, S.^*; Yu, S. J.; Wang, Z. H.; Zheng, X. L.

来源：Cellulose Chemistry and Technology, 2013, 47(7-8): 527-533.

• ultrasound-assisted
• cellulose
• beet pulp
• phthalation
• ionic liquid (IL)

Cellulose phthalates were synthesized from beet pulp cellulose and phthalic anhydride in ionic liquid (IL) 1-butyl-3-methylimidazolium chloride assisted by ultrasound. The parameters investigated included ultrasound time (from 15 to 60 min), temperature (between 95 and 120 degrees C), the molar ratio of phthalic anhydride/anhydroglucose units in cellulose (from 2:1 to 6:1), and reaction time (from 30 to 70 min). The results showed that the synergy of the combined use of ultrasound and IL successfully enhanced the degree of substitution of cellulose phthalates under the experimental conditions of the present study. After the chemical modification, the results of FT-IR and solid-state CP/MAS C-13 NMR showed the appearance of hydroxyl groups and reduction of OH bonds on the cellulose. The TGA data indicated that the cellulose phthalate showed lower thermal stability than native cellulose.

• 出版日期2013-8
• 单位河南工业大学; 华南理工大学