TY - JOUR
T1 - Effects of thermal and chemical treatments on the structural stability of cellulose acetate nanofibers
AU - Greish, Yaser E.
AU - Meetani, Mohammed A.
AU - Al Matroushi, Eisa A.
AU - Shamsi, Bothaina Al
PY - 2010/10/15
Y1 - 2010/10/15
N2 - 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.
AB - 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.
KW - Alkali treatment
KW - Cellulose
KW - Microstructure
KW - Nanofibers
KW - Thermal stability
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U2 - 10.1016/j.carbpol.2010.05.012
DO - 10.1016/j.carbpol.2010.05.012
M3 - Article
AN - SCOPUS:77955654666
SN - 0144-8617
VL - 82
SP - 569
EP - 577
JO - Carbohydrate Polymers
JF - Carbohydrate Polymers
IS - 3
ER -