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<p>The structure and properties of polyvinylidene fluoride (PVDF)-based composites containing 2,2,6,6-tetramethylpiperidine 1-oxyl (TEMPO)-free-radical-oxidized cellulose nanofibers (CNF) and polyrotaxane as an organic filler were evaluated. The TEMPO-oxidized CNF and polyrotaxane were melt-compounded and composited with PVDF in a dry process. The resulting composite was oriented using uniaxial drawing. The degree of crystallinity increased from less than 30% to less than 60% owing to drawing orientation. However, the crystallization temperature did not change, and it was predicted that the thickness of the PVDF lamellae would not change. Before drawing, the composite showed a slightly improved Young’s modulus and Maximum stress value and Maintained its elongation properties compared with neat PVDF. After drawing, even samples drawn five and seven times showed elongation rates of over 50%, and Young’s moduli were just over 2000&#xa0;MPa and 3000&#xa0;MPa, respectively. When composited with CNF that had not been TEMPO-oxidized, the elongation values were approximately 30% at high draw ratios, suggesting that TEMPO-oxidation promotes the improvement of PVDF elongation properties.</p> Graphical abstract <p></p>

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Creation of drawn-oriented composites based on the fluorinated polymer containing TEMPO-oxidized cellulose nanofibers and polyrotaxane with excellent elongation properties

  • 期刊论文

  • 发表日期：

    2025年9月10日

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  • Pinjung Chu,
  • Chisato Nara,
  • Rokibul Hasan Rumon,
  • Kai Xu,
  • Atsuhiro Fujimori

摘要

The structure and properties of polyvinylidene fluoride (PVDF)-based composites containing 2,2,6,6-tetramethylpiperidine 1-oxyl (TEMPO)-free-radical-oxidized cellulose nanofibers (CNF) and polyrotaxane as an organic filler were evaluated. The TEMPO-oxidized CNF and polyrotaxane were melt-compounded and composited with PVDF in a dry process. The resulting composite was oriented using uniaxial drawing. The degree of crystallinity increased from less than 30% to less than 60% owing to drawing orientation. However, the crystallization temperature did not change, and it was predicted that the thickness of the PVDF lamellae would not change. Before drawing, the composite showed a slightly improved Young’s modulus and Maximum stress value and Maintained its elongation properties compared with neat PVDF. After drawing, even samples drawn five and seven times showed elongation rates of over 50%, and Young’s moduli were just over 2000 MPa and 3000 MPa, respectively. When composited with CNF that had not been TEMPO-oxidized, the elongation values were approximately 30% at high draw ratios, suggesting that TEMPO-oxidation promotes the improvement of PVDF elongation properties.

Graphical abstract