Effect of fiber orientation in dynamic FTIR study on native cellulose

Hinterstoisser, Barbara; Åkerholm, Margaretha; Salmén, Lennart

doi:10.1016/s0008-6215(01)00167-7

Cited by 113 publications

(76 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The peak absorbance at 3329 cm −1 represents the O-H functional group. The peak absorbance located close to 3340 cm −1 is a typical characteristic of cellulose [27]. As shown in these figures, it is clear that the peak absorbance value of the O-H functional group located close to 3329 cm −1 decreases with aging due to the oxidation process.…”

Section: Fourier Transform Infrared (Ftir) Spectroscopy Analysis Of Tmentioning

confidence: 69%

Fourier Transform Infrared (FTIR) Spectroscopy Analysis of Transformer Paper in Mineral Oil-Paper Composite Insulation under Accelerated Thermal Aging

2018

View full text Add to dashboard Cite

Abstract:Mineral oil is the most popular insulating liquid for high voltage transformers due to its function as a cooling liquid and an electrical insulator. Kraft paper has been widely used as transformer solid insulation for a long time already. The degradation process of transformer paper due to thermal aging in mineral oil can change the physical and chemical structure of the cellulose paper. Fourier transform infrared (FTIR) spectroscopy analysis was used to identify changes in the chemical structure of transformer paper aged in mineral oil. FTIR results show that the intensity of the peak absorbance of the O-H functional group decreased with aging but the intensity of the peak absorbance of the C-H and C=O functional groups increased with aging. Changes in the chemical structure of the cellulose paper during thermal aging in mineral oil can be analyzed by an oxidation process of the cellulose paper and the reaction process between the carboxylic acids in the mineral oil and the hydroxyl groups on the cellulose. The correlation between the functional groups and the average number of chain scissions of transformer paper gives initial information that the transformer paper performance can be identified by using a spectroscopic technique as a non-destructive diagnostic technique.

show abstract

Section: Fourier Transform Infrared (Ftir) Spectroscopy Analysis Of Tmentioning

confidence: 69%

Fourier Transform Infrared (FTIR) Spectroscopy Analysis of Transformer Paper in Mineral Oil-Paper Composite Insulation under Accelerated Thermal Aging

2018

View full text Add to dashboard Cite

show abstract

“…The result shows that the weight percent of the C element in transformer insulation paper has increased with aging as shown in Figure 15. Figure 16a [33]. Figure 13a,b show that the intensity of the absorbance peaks of the O-H functional group decreased during aging.…”

Section: O-h C-h C=o C-omentioning

confidence: 87%

“…Figure 12 shows the correlation between the intensity of peak absorbance of C=O functional group at wavenumber 1743 cm −1 and the average number of chain scission of transformer insulation paper. [33]. Figure 13a,b show that the intensity of the absorbance peaks of the O-H functional group decreased during aging.…”

Section: O-h C-h C=o C-omentioning

confidence: 91%

Study on the Effects of Thermal Aging on Insulating Paper for High Voltage Transformer Composite with Natural Ester from Palm Oil Using Fourier Transform Infrared Spectroscopy (FTIR) and Energy Dispersive X-ray Spectroscopy (EDS)

Munajad

Subroto

Suwarno³

2017

Energies

View full text Add to dashboard Cite

Abstract:Mineral oil is widely used as liquid insulation in high voltage equipment. Due to environmental considerations, recently natural esters have been considered as naturally friendly liquid insulation candidates for high voltage transformers. In this experiment, transformer insulation paper was subjected to get accelerated aging test with copper strip in natural ester in a hermeneutical heat-resistant glass bottle at temperatures of 120 • C and 150 • C for 336 h, 672 h and 1008 h. The experimental results of Fourier transform infrared spectroscopy (FTIR) showed that the intensity of the absorbance peak of the O-H functional group decreased with aging, while the intensity of the C-H and C=O functional group absorbance peaks have increased with aging and the intensity of the C-O functional group absorbance peak has a tendency to increase with aging. The energy dispersive X-ray spectroscopy (EDS) experimental results showed that the weight percent of the element C increased with aging and the weight percent of the element O has decreased with aging. The experimental results show a good correlation between the degree of polymerization (DP) and the weight percent of O element. This indicates that EDS may be used as a new method for estimating the DP of transformer insulation paper.

show abstract

“…Free OH, weakly absorbed water, OZH stretching of water bound by hydrogen bonds (Hinterstoisser et al, 2001;Luna et al, 2012;Olsson and Salmen, 2004;Popescu et al, 2006) 3500-3100, 3600 3425-3400, 2940, 2920, 2880-2850 3568, 3561, 3499-3468, 3430-3423, 3419 3600-3000…”

Section: Short-term Artificial Exposurementioning

confidence: 99%

“…Cellulose I β, 6ZOH·OZ3 intermolecular H-bond (Hinterstoisser et al, 2001;Popescu et al, 2007) 3270, 3310-3230 -3278, 3277, 3271 Asymmetric CH, CH 2 stretching, OCH 3 stretch (Hinterstoisser et al, 2001;Luna et al, 2012;Popescu et al, 2006) Wood facade materials ageing analysis by FTIR spectroscopy Gupta, Jelle and Gao distribution in the exposure chamber. A steel perforated mesh was used as a solar radiation filter to reduce the oxidative solar radiation stress on the specimens by 50% of original radiation.…”

Section: Short-term Artificial Exposurementioning

confidence: 99%

Wood facade materials ageing analysis by FTIR spectroscopy

Gupta

Jelle

Gao

2015

Proceedings of the Institution of Civil Engineers - Constructio

View full text Add to dashboard Cite

Attenuated total reflection Fourier transform infrared spectroscopy is used in this study to quantify wood degradation. Nine different types of wood materials were studied. All types of wood were exposed in an Atlas solar simulator against artificial climate conditions. Additionally, natural climate exposure was performed for all types of wood at an outdoor test site in Trondheim, Norway, for 4 years. Surface treatment enhanced the durability of the wood and their performance against weathering. Rough surfaces might reduce the resistance against degradation in comparison with planed surfaces. The degradation during climate exposure created loss of lignin and accumulation of cellulose at the surface.

show abstract

Effect of fiber orientation in dynamic FTIR study on native cellulose

Cited by 113 publications

References 19 publications

Fourier Transform Infrared (FTIR) Spectroscopy Analysis of Transformer Paper in Mineral Oil-Paper Composite Insulation under Accelerated Thermal Aging

Fourier Transform Infrared (FTIR) Spectroscopy Analysis of Transformer Paper in Mineral Oil-Paper Composite Insulation under Accelerated Thermal Aging

Study on the Effects of Thermal Aging on Insulating Paper for High Voltage Transformer Composite with Natural Ester from Palm Oil Using Fourier Transform Infrared Spectroscopy (FTIR) and Energy Dispersive X-ray Spectroscopy (EDS)

Wood facade materials ageing analysis by FTIR spectroscopy

Contact Info

Product

Resources

About