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Qian J, Li Y, Gao J, et al. The effect of ultrasonic intensity on physicochemical properties of Chinese fir. Ultrason Sonochem. 2020;64:104985doi: 10.1016/j.ultsonch.2020.104985.
Qian, J., Li, Y., Gao, J., He, Z., & Yi, S. (2020). The effect of ultrasonic intensity on physicochemical properties of Chinese fir. Ultrasonics sonochemistry, 64104985. https://doi.org/10.1016/j.ultsonch.2020.104985
Qian, Jing, et al. "The effect of ultrasonic intensity on physicochemical properties of Chinese fir." Ultrasonics sonochemistry vol. 64 (2020): 104985. doi: https://doi.org/10.1016/j.ultsonch.2020.104985
Qian J, Li Y, Gao J, He Z, Yi S. The effect of ultrasonic intensity on physicochemical properties of Chinese fir. Ultrason Sonochem. 2020 Jun;64:104985. doi: 10.1016/j.ultsonch.2020.104985. Epub 2020 Jan 22. PMID: 31999990.
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Ultrason Sonochem. 2020 Jun;64:104985. doi: 10.1016/j.ultsonch.2020.104985. Epub 2020 Jan 22.

The effect of ultrasonic intensity on physicochemical properties of Chinese fir.

Ultrasonics sonochemistry

Jing Qian, Yajing Li, Jingjing Gao, Zhengbin He, Songlin Yi

Affiliations

  1. Beijing Key Laboratory of Wood Science and Engineering, College of Material Science and Technology, Beijing Forestry University, No. 35 Tsinghua East Road, Haidian District, Beijing, PR China.
  2. Beijing Key Laboratory of Wood Science and Engineering, College of Material Science and Technology, Beijing Forestry University, No. 35 Tsinghua East Road, Haidian District, Beijing, PR China. Electronic address: [email protected].
  3. Beijing Key Laboratory of Wood Science and Engineering, College of Material Science and Technology, Beijing Forestry University, No. 35 Tsinghua East Road, Haidian District, Beijing, PR China. Electronic address: [email protected].

PMID: 31999990 DOI: 10.1016/j.ultsonch.2020.104985

Abstract

Cavitation intensity is affected by ultrasonic intensity (UI) and is a key parameter to describe experimental results during ultrasonic treatment. The relationship between the UI and physicochemical properties of Chinese fir was investigated. In this study, four frequencies (25, 28, 40, and 59 kHz) were used at the same intensity of 240 W and the same duration of 35 min. The UI during the ultrasonic treatment was determined, and the chemical components were determined. The chemical structure, crystallinity, morphology, and extractives of wood were respectively analyzed by Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), and gas chromatography-mass spectrometry (GC-MS). The results showed that higher crystallinity was associated with a larger integrated area under the curve of the ultrasonic intensity (UIA). The largest UIA was observed at 25 kHz, followed by those at 40, 59, and 28 kHz. The relative content of hemicellulose was strongly affected by the ultrasonic treatment. No chemical reactions were observed in the wood, whereas the ultrasonic treatment affected the torus of the bordered pits and facilitated the migration of extractives. In general, the higher the UIA, the stronger the effect of the cavitation was. The most significant changes in the physicochemical properties were observed at 25 kHz. The instantaneous ultrasonic intensity (IUI) changed over time, and the UIA was closely associated with changes in the physicochemical properties of the wood. The results of this study demonstrate that UI has a significant influence on the physicochemical properties of wood.

Copyright © 2020 Elsevier B.V. All rights reserved.

Keywords: Chinese fir; Physicochemical properties; Ultrasonic intensity

Conflict of interest statement

Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this pa

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