DISSOLUTION OF CELLULOSE IN IONIC LIQUID ACTIVATED WITH DIFFERENT METHODS
Different pretreatment methods including mechanical milling, alcohol treatment, ultrasound irradiation, and microwave irradiation were discussed. The results showed that compared with cellulose without any activation, cellulose pretreated with ethanol at room temperature for 10 h were easily dissolved in C4mimCl and the dissolution time decreased from 11.1 h to 2.57 h. Further treatment with ultrasonic and microwave irradiation in ethanol could further reduce the dissolution time needed in C4mimCl. It was found that the dissolution time of ultrasound- and microwave-activated cellulose could be reduced to 0.87 h and 1.28 h, respectively. The physicochemical properties of regenerated cellulose were characterized with FT-IR, CP/MAS 13C-NMR, and thermal analysis. It was found that the crystalline structure of native cellulose was destroyed and the regenerated cellulose was converted into cellulose II. The thermal stability of cellulose decreased and the pyrolysis residues increased after dissolution and regeneration.
cellulose Ionic liquid dissolution ultrasound microwave activation
Liu Chuanfu Zhang Aiping Lan Wu Sun Runcang Chen Mingjie
State Key Laboratory of Pulp and Paper Engineering, South China University of Technology,Guangzhou, State Key Laboratory of Pulp and Paper Engineering, South China University of Technology,Guangzhou,
国际会议
广州
英文
236-239
2010-11-08（万方平台首次上网日期，不代表论文的发表时间）