Effects of thermal and chemical treatments on the structural stability of cellulose acetate nanofibers

被引：24
作者：
Greish, Yaser E. [1 ]
Meetani, Mohammed A. [1 ]
Al Matroushi, Eisa A. [2 ]
Al Shamsi, Bothaina [3 ]
机构：
[1] United Arab Emirates Univ, Dept Chem, Coll Sci, Al Ain, U Arab Emirates
[2] United Arab Emirates Univ, Coll Engn, Dept Chem & Petr Engn, Al Ain, U Arab Emirates
[3] Al Ain Municipal, Al Ain, U Arab Emirates
来源：
CARBOHYDRATE POLYMERS | 2010年 / 82卷 / 03期
关键词：
Cellulose; Nanofibers; Thermal stability; Alkali treatment; Microstructure; SOLVENT SYSTEM; ELECTROSPUN; FIBERS; MORPHOLOGY; MEMBRANES;
D O I：
10.1016/j.carbpol.2010.05.012
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
Cellulose nanofibrous membranes made by electrospinning are characterized by their high porosity and interconnectivity, and therefore, considered potential candidates for ultrafiltration processes. Due to the difficulty to dissolve cellulose, electrospinning of cellulose derivatives followed by regeneration of cellulose is a more convenient approach. Using a previously optimized set of electrospinning parameters, the effects of thermal and chemical treatment of cellulose acetate (CA) nanofibers on their structural stabilities are thoroughly discussed in the current article. Nanofibrous membranes initially made from solutions containing 10-20 wt% CA were investigated. Structural stability was monitored using infrared spectroscopy (IR), differential scanning calorimetry (DSC), and scanning electron microscopy (SEM) techniques. Results showed the possibility of de-acetylation of CA nanofibers during the thermal treatment step, more precisely on the procedure and temperature of treatment. Combining thermal and alkali treatment of CA nanofibers was found crucial to their morphologies. Optimization of these processes is, therefore, attempted. Phase purity of the regenerated cellulose nanofibers was investigated. (C) 2010 Elsevier Ltd. All rights reserved.
引用
收藏
页码：569 / 577
页数：9
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