Preparation and characterization of thermally stable cellulose nanocrystals via a sustainable approach of FeCl3-catalyzed formic acid hydrolysis

被引：136

作者：

Du, Haishun ^{[1
,2
]}

Liu, Chao ^{[2
]}

Mu, Xindong ^{[2
]}

Gong, Wenbo ^{[3
]}

Lv, Dong ^{[2
]}

Hong, Yimei ^{[1
]}

Si, Chuanling ^{[1
]}

Li, Bin ^{[2
]}

机构：

[1] Tianjin Univ Sci & Technol, Coll Papermaking Sci & Technol, Tianjin Key Lab Pulp & Paper, Tianjin 300457, Peoples R China

[2] Chinese Acad Sci, Qingdao Inst Bioenergy & Bioproc Technol, Key Lab Biobased Mat, Qingdao 266101, Peoples R China

[3] Shanghai Inst Technol, Sch Chem & Environm Engn, Shanghai 201418, Peoples R China

来源：

CELLULOSE | 2016年 / 23卷 / 04期

基金：

中国国家自然科学基金;

关键词：

Cellulose nanocrystals (CNCs); Formic acid hydrolysis; FeCl3; catalysis; Cationic modification; Renewable resources; ENZYMATIC-HYDROLYSIS; POLY(LACTIC ACID); CORN STOVER; NANOCELLULOSE; PRETREATMENT; EXTRACTION; NANOFIBRILS; ENHANCEMENT; SELECTIVITY; AGENT;

D O I：

10.1007/s10570-016-0963-5

中图分类号：

TB3 [工程材料学]; TS [轻工业、手工业、生活服务业];

学科分类号：

0805 ; 080502 ; 0822 ;

摘要：

Cellulose nanocrystals (CNCs) can be used as building blocks for the production of many renewable and sustainable nanomaterials. In this work, CNCs were produced from bleached eucalyptus kraft pulp with a high yield over 75 % via FeCl3-catalyzed formic acid (FA) hydrolysis process. It was found that the particle size of resultant CNC products (F-CNC) decreased with the increase of FeCl3 dosage in FA hydrolysis, and a maximum crystallinity index of about 75 % could be achieved when the dose of FeCl3 was 0.015 M (i.e. about 7 % based on the weight of starting material). Thermogravimetric analyses revealed that F-CNC exhibited a much higher thermal stability (the decomposition temperature was over 260 A degrees C) than S-CNC prepared by typical sulfuric acid hydrolysis. In the FeCl3-catalyzed FA hydrolysis process, FA could be easily recovered and reused, and FeCl3 could be transferred to Fe(OH)(3) as a high value-added product. Thus, the FeCl3-catalyzed FA hydrolysis process could be sustainable and economically feasible. In addition, F-CNC could be well dispersed in DMSO and its dispersibility in water could be improved by a cationic surface modification.

引用

页码：2389 / 2407

页数：19