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Published in: Cellulose 2/2023

19-11-2022 | Original Research

Cellulose hydrogen bond detection using terahertz time-domain spectroscopy to indicate deterioration of oil–paper insulation

Authors: Yuxin He, Lijun Yang, Li Cheng, Qiyu Chen, Hua Yu, Wei Hou

Published in: Cellulose | Issue 2/2023

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Abstract

Nondestructive evaluation of aging state of oil–paper insulation is an important means to prevent aging failure. A characteristic model based on terahertz-sensing hydrogen bond content is proposed in this study to evaluate the aging state of oil-impregnated pressboard nondestructively by analyzing its terahertz absorption spectrum. Oil–paper samples at different aging stages were obtained using accelerated thermal aging in the laboratory, and the terahertz spectrum collection range of oil-impregnated pressboard was 0.3–2.0 THz. Spectral characteristic peaks were extracted and the relationship between peak area and degree of polymerization of oil-impregnated pressboard was investigated on the basis of quantum chemical simulation analysis and Gaussian function fitting of experimental spectral features. Finally, the mechanism of characteristic peak was verified by combining infrared spectroscopy. Results showed that the 1 THz characteristic peak is closely related to hydroxyl and hydrogen bond contents in cellulose, its area presents satisfactory semilogarithmic linear function relationship with the degree of polymerization of insulating paper, and the maximum Pierce correlation coefficient is 0.95. The prediction results of aging samples with different oil–paper ratios further verify the correctness of this relationship, and the prediction error of the degree of polymerization value of insulating paper is within ± 20%. The results of this study can provide new insights into the nondestructive evaluation of the aging state of oil–paper insulation using terahertz technology.

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Literature
go back to reference Gilbert R, Jalbert J, Duchesne S, Tétreault P, Morin B, Denos Y (2010) Kinetics of the production of chain-end groups and methanol from the depolymerization of cellulose during the ageing of paper/oil systems. Part 2: thermally-upgraded insulating papers. Cellulose 17(2):253–269. https://doi.org/10.1007/s10570-009-9365-2CrossRef Gilbert R, Jalbert J, Duchesne S, Tétreault P, Morin B, Denos Y (2010) Kinetics of the production of chain-end groups and methanol from the depolymerization of cellulose during the ageing of paper/oil systems. Part 2: thermally-upgraded insulating papers. Cellulose 17(2):253–269. https://​doi.​org/​10.​1007/​s10570-009-9365-2CrossRef
Metadata
Title
Cellulose hydrogen bond detection using terahertz time-domain spectroscopy to indicate deterioration of oil–paper insulation
Authors
Yuxin He
Lijun Yang
Li Cheng
Qiyu Chen
Hua Yu
Wei Hou
Publication date
19-11-2022
Publisher
Springer Netherlands
Published in
Cellulose / Issue 2/2023
Print ISSN: 0969-0239
Electronic ISSN: 1572-882X
DOI
https://doi.org/10.1007/s10570-022-04950-7

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