Journal
CARBOHYDRATE POLYMERS
Volume 90, Issue 2, Pages 982-987Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2012.06.031
Keywords
Cellulose; Nanofiber; Solution blowing; Core-shell
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Funding
- National Natural Science Foundation of China [51103104]
- Tianjin Natural Science Foundation [10JCYBJC02700, 09JCZDJC22700]
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Solution blowing is an innovative process for spinning micro-/nano-fibers from polymer solutions using high-velocity gas flow as fiber forming driving force. Submicron-scale cellulose fibers were successfully solution blown by two improvement measures. First, cellulose solution was directly blown to fibers of 260-1900 nm in diameter by raising the air temperature along the spinning line which was proved to accelerate the evaporation of solvent and fiber forming. Second, coaxial solution blowing technique was established with cellulose solution and polyethylene oxide (PEO) solution used as core and shell liquids, respectively. The core-shell structures of the fibers were examined by SEM and TEM. Cellulose fibers with diameter between 160 nm and 960 nm were further obtained after removing PEO shell. X-ray diffraction studies showed that the two kinds of submicron-scale cellulose fibers are mostly amorphous. (C) 2012 Elsevier Ltd. All rights reserved.
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