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<p>For the first time, a comparative study on effects of nanoparticulate and nanofibrous forms of cellulose on structures and ferroelectricity of Rochelle salt (RS) was conducted over a wide range of frequency (1–1011&#xa0;Hz) and temperature (210–330&#xa0;K). Two nanocomposites were synthesized by incorporating Rochelle salt into nanofibrous cellulose featuring nanochannels (40–100&#xa0;nm) or mixing it with nanocellulose particles (40–100&#xa0;nm). Techniques of Scanning Electron Microscopy (SEM), X-ray Diffraction (XRD), Fourier Transform Infrared (FTIR) spectroscopy were used to characterize the studied samples. The obtained results indicated that the nanofibrous cellulose exhibited a significantly stronger influence on crystalline structures, functional groups and ferroelectricity of RS compared to the nanoparticulate form. The lower-temperature phase transition point detected in the RS/nanofibrous cellulose samples was found to be strongly depressed due to the occurrence of domain-wall freezing. Meanwhile, the cellulose nanoparticles did not affect the primary phase transition positions of RS, but it created an additional peak near the lower-temperature phase transition. The size effects and hydrogen bonding were supposed to be responsible for the observed phenomena.</p>

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Effects of nanofibrous and nanoparticulate forms of cellulose on structures and ferroelectricity of Rochelle salt over a wide range of frequency and temperature

  • 期刊论文

  • 发表日期：

    2026年5月29日

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  • Hoai Thuong Nguyen,
  • Phan Thi Bich Thao

摘要

For the first time, a comparative study on effects of nanoparticulate and nanofibrous forms of cellulose on structures and ferroelectricity of Rochelle salt (RS) was conducted over a wide range of frequency (1–1011 Hz) and temperature (210–330 K). Two nanocomposites were synthesized by incorporating Rochelle salt into nanofibrous cellulose featuring nanochannels (40–100 nm) or mixing it with nanocellulose particles (40–100 nm). Techniques of Scanning Electron Microscopy (SEM), X-ray Diffraction (XRD), Fourier Transform Infrared (FTIR) spectroscopy were used to characterize the studied samples. The obtained results indicated that the nanofibrous cellulose exhibited a significantly stronger influence on crystalline structures, functional groups and ferroelectricity of RS compared to the nanoparticulate form. The lower-temperature phase transition point detected in the RS/nanofibrous cellulose samples was found to be strongly depressed due to the occurrence of domain-wall freezing. Meanwhile, the cellulose nanoparticles did not affect the primary phase transition positions of RS, but it created an additional peak near the lower-temperature phase transition. The size effects and hydrogen bonding were supposed to be responsible for the observed phenomena.