Modified ammonium persulfate oxidations for efficient preparation of carboxylated cellulose nanocrystals

被引:70
作者
Liu, Yunxiao [1 ]
Liu, Lehuan [1 ]
Wang, Kuntao [1 ]
Zhang, Hui [1 ]
Yuan, Yuan [1 ]
Wei, HongXiu [1 ]
Wang, Xin [1 ]
Duan, Yongxin [1 ]
Zhou, Lijuan [1 ,2 ]
Zhang, Jianming [1 ]
机构
[1] Qingdao Univ Sci & Technol, Key Lab Rubber Plast, Minist Educ Shandong Prov, Key Lab Rubber Plast, Qingdao 266042, Shandong, Peoples R China
[2] Sichuan Univ, State Key Lab Polymer Mat Engn, Chengdu 610065, Sichuan, Peoples R China
基金
中国国家自然科学基金;
关键词
Carboxylated cellulose nanocrystals; Activation of ammonium persulfate; N; N'; N'-tetramethylethylenediamine; (TMEDA); Ultrasound; ACID HYDROLYSIS; MECHANISM; REMOVAL; WASTE; WATER; ACTIVATION; EXTRACTION; RESIDUES; STRATEGY; SYSTEMS;
D O I
10.1016/j.carbpol.2019.115572
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
Ammonium persulfate (APS) was able to produce carboxylated cellulose nanocrystals (CNCs-COOH) directly from the raw materials of cellulose. However, the industrial production of CNCs-COOH by this method is obstructed by the lower preparation efficiency. Herein, by the activation via N,N,N',N'-tetramethylethylenediamine (TMEDA) and ultrasonic assisted disintegration, modified APS method to extract CNCs-COOH from pulp was presented. A high yield (up to 62.5 %), low usage of APS (8.5 g APS per gram pulp) and less reaction time (6 h) was achieved. The as-prepared CNCs-COOH exhibited high carboxyl group content (1.45 mmol/g) and high crystallinity index of 93 %. The reaction mechanism has been studied, and the results show that with the addition of TMEDA, S2082-can be converted to free radicals and hydrogen peroxide more quickly. Our studies suggested that modified APS method may be a suitable and economic alternative for the preparation of CNCsCOOH.
引用
收藏
页数:8
相关论文
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