Annealing and saponification of electrospun cellulose-acetate nanofibers used as reinforcement materials for composites
Annealing and saponification of electrospun cellulose-acetate nanofibers used as reinforcement materials for composites
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DOI：
10.1016/j.compositesa.2018.07.028
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发表时间：
2018-10
期刊：
影响因子：
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通讯作者：
Shunya Inukai;Naruki Kurokawa;A. Hotta
中科院分区：
文献类型：
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作者：
Shunya Inukai;Naruki Kurokawa;A. Hotta
为了提高再生纤维素纳米纤维（RC-NF）的力学性能，研究了电纺醋酸纤维素纳米纤维（CA-NF）的退火和皂化工艺。结果表明，将CA-NF在50 ℃下的退火时间从0增加到12 h， RC-NF的结晶度从37%增加到41%，并在12 h后保持不变。应用Tsai提出的理论，RC-NF的杨氏模量随着退火时间从0增加到12 h而从9.0增加到28.0 GPa，并且在12 h后保持不变。随着退火温度的升高，RC-NF的最大结晶度和杨氏模量的优化退火时间变短，表明RC-NF的结晶度和杨氏模量具有很强的相关性。最终RC-NF/PVA的杨氏模量从2.1增加到3.0 GPa，而纯PVA的杨氏模量为1.5 GPa。
To enhance the mechanical properties of regenerated cellulose nanofibers (RC-NF), the annealing and the saponification of electrospun cellulose-acetate nanofibers (CA-NF) have been investigated. It was found that, by increasing the annealing time of CA-NF at 50 °C from 0 to 12 h, the crystallinity of RC-NF increased from 37% to 41%, which became constant after 12 h. By applying the theory proposed by Tsai, the Young’s modulus of RC-NF was found to increase from 9.0 to 28.0 GPa by increasing the annealing time from 0 to 12 h, which also became constant after 12 h. The optimized annealing time for the maximum crystallinity and Young’s modulus became shorter by increasing the annealing temperature, indicating that the crystallinity and the Young’s modulus of RC-NF were strongly correlated. Eventually, the Young’s modulus of RC-NF/PVA increased from 2.1 to 3.0 GPa at the maximum, while that of pure PVA was 1.5 GPa.