期刊
ULTRASONICS SONOCHEMISTRY
卷 36, 期 -, 页码 319-325出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ultsonch.2016.12.013
关键词
Ultrasonic energy; Cellulose acetate; Cellulose nanofibers; Electrospinning; Deacetylation
资金
- Mehran University of Engineering and Technology, Jamshoro, Pakistan
Herein we report a rapid method for deacetylation of cellulose acetate (CA) nanofibers in order to produce cellulose nanofibers using ultrasonic energy. The CA nanofibers were fabricated via electrospinning thereby treated with NaOH and NaOH/EtOH solutions at various pH levels for 30, 60 and 90 min assisted by ultrasonic energy. The nanofiber webs were optimized by degree of deacetylation (DD%) and wicking behavior. The resultant nanofibers were further characterized by FTIR, SEM, WARD, DSC analysis. The DD % and FTIR results confirmed a complete conversion of CA nanofibers to cellulose nanofibers within 1 h with substantial increase of wicking height. Nanofibers morphology under SEM showed slightly swelling and no damage of nanofibers observed by use of ultrasonic energy. The results of ultrasonic-assisted deacetylation are comparable with the conventional deacetylation. Our rapid method offers substantially reduced deacetylation time from 30 h to just 1 h, thanks to the ultrasonic energy. (C) 2016 Elsevier B.V. All rights reserved.
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