Sustainable conversion regenerated cellulose into cellulose oleate by sonochemistry  

作　　者：De-Fa Hou Pan-Pan Yuan Zi-Wei Feng Meng An Pei-Yao Li Can Liu Ming-Bo Yang 

机构地区：[1]National Joint Engineering Research Center for Highly-Efficient Utilization Technology of Forestry Resource,Southwest Forestry University,Kunming 650224,China [2]College of Polymer Science and Engineering,State Key Laboratory of Polymer Materials Engineering,Sichuan University,Chengdu 610065,China

出　　处：《Frontiers of Chemical Science and Engineering》2023年第8期1096-1108,共13页化学科学与工程前沿（英文版）

基　　金：The authors are grateful for financial support from the National Natural Science Foundation of China(Grant Nos.52273040 and 51873128);Yunnan Fundamental Research Projects(Grant No.202301AT070232).

摘　　要：Derivatization has great potential for the high-value utilization of cellulose by enhancing its processability and functionality.However,due to the low reactivity of natural cellulose,it remains challenging to rapidly prepare cellulose derivatives with high degrees of substitution.The“cavitation effect”of ultrasound can reduce the particle size and crystalline index of cellulose,which provides a possible method for preparing cellulose derivatives.Herein,a feasible method was proposed for efficiently converting regenerated cellulose to cellulose oleate with the assistance of ultrasonic treatment.By adjusting the reaction conditions including ultrasonic intensity,feeding ratios of oleic acid,reaction time,and reaction solvent,a series of cellulose oleates with degrees of substitution ranging from 0.37 to 1.71 were synthesized.Additionally,the effects of different reaction conditions on the chemical structures,crystalline structures,and thermal behaviors were investigated thoroughly.Cellulose oleates with degrees of substitution exceeding 1.23 exhibited amorphous structures and thermoplasticity with glass transition temperatures at 159.8 to 172.6℃.This study presented a sustainable and practicable method for effectively derivatizing cellulose.

关 键 词：regenerated cellulose cellulose oleate SONOCHEMISTRY degree of substitution THERMOPLASTICITY 

分 类 号：O62[理学—有机化学]