Annealing and saponification of electrospun cellulose-acetate nanofibers used as reinforcement materials for composites

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Abstract

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.

Original languageEnglish
Pages (from-to)158-165
Number of pages8
JournalComposites Part A: Applied Science and Manufacturing
Volume113
DOIs
Publication statusPublished - 2018 Oct 1

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Saponification
Nanofibers
Cellulose
Reinforcement
Annealing
Composite materials
Elastic moduli
acetylcellulose
Mechanical properties

Keywords

  • A. Cellulose
  • A. Natural fibers
  • A. Polymer-matrix composites (PMCs)
  • B. Mechanical properties

ASJC Scopus subject areas

  • Ceramics and Composites
  • Mechanics of Materials

Cite this

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title = "Annealing and saponification of electrospun cellulose-acetate nanofibers used as reinforcement materials for composites",
abstract = "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.",
keywords = "A. Cellulose, A. Natural fibers, A. Polymer-matrix composites (PMCs), B. Mechanical properties",
author = "Shunya Inukai and Naruki Kurokawa and Atsushi Hotta",
year = "2018",
month = "10",
day = "1",
doi = "10.1016/j.compositesa.2018.07.028",
language = "English",
volume = "113",
pages = "158--165",
journal = "Composites - Part A: Applied Science and Manufacturing",
issn = "1359-835X",
publisher = "Elsevier Limited",

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T1 - Annealing and saponification of electrospun cellulose-acetate nanofibers used as reinforcement materials for composites

AU - Inukai, Shunya

AU - Kurokawa, Naruki

AU - Hotta, Atsushi

PY - 2018/10/1

Y1 - 2018/10/1

N2 - 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.

AB - 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.

KW - A. Cellulose

KW - A. Natural fibers

KW - A. Polymer-matrix composites (PMCs)

KW - B. Mechanical properties

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U2 - 10.1016/j.compositesa.2018.07.028

DO - 10.1016/j.compositesa.2018.07.028

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JO - Composites - Part A: Applied Science and Manufacturing

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