NDLI: 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

Please wait, while we are loading the content...

Carbon-13 solid state NMR investigation and modeling of the morphological reorganization in regenerated cellulose fibres induced by controlled acid hydrolysis

Kinetics of autocatalytic acid hydrolysis of cellulose with crystalline and amorphous fractions

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

Comparison of the characteristics of cellulose microfibril aggregates isolated from fiber and parenchyma cells of Moso bamboo (Phyllostachys pubescens)

Water dispersion of cellulose II nanocrystals prepared by TEMPO-mediated oxidation of mercerized cellulose at pH 4.8

High reinforcing capability cellulose nanocrystals extracted from Syngonanthus nitens (Capim Dourado)

Preparation of cellulose nanofibers with hydrophobic surface characteristics

Fourier transform infrared spectroscopic approach to the study of the secondary cell wall development in cotton fiber

NMR cryoporometry to study the fiber wall structure and the effect of drying

Crystal and pore structure of wheat straw cellulose fiber during recycling

Activated peroxide bleaching of regenerated bamboo fiber using a butyrolactam-based cationic bleach activator

Microstructure and mechanical properties of bacterial cellulose/chitosan porous scaffold

Dynamic interaction between the growing Ca–P minerals and bacterial cellulose nanofibers during early biomineralization process

Viscoelasticity and water plasticization of polymer-cellulose composite films and paper sheets

DMA analysis and wood bonding of PVAc latex reinforced with cellulose nanofibrils

Mutagenesis induced by high hydrostatic pressure treatment: a useful method to improve the bacterial cellulose yield of a Gluconoacetobacter xylinus strain

Surface-sensitive method to determine calcium carbonate filler contents in cellulose matrices

Chemical and physical analysis of cotton fabrics plasma-treated with a low pressure DC glow discharge

FT Raman investigation of sodium cellulose sulfate

Interactions of ionic liquids with polysaccharides 9. Hydroxyalkylation of cellulose without additional inorganic bases

2,3-O-Methyl cellulose: studies on synthesis and structure characterization

Cellulose : Volume 17, Issue 1, February 2010

Cellulose : Volume 16

Cellulose : Volume 15

Cellulose : Volume 14

Cellulose : Volume 13

Cellulose : Volume 12

Cellulose : Volume 11

Cellulose : Volume 10

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

Content Provider	Springer Nature Link
Author	Gilbert, Roland Jalbert, Jocelyn Duchesne, Steve Tétreault, Pierre Morin, Brigitte Des, Yves
Copyright Year	2009
Abstract	In order to go further in demonstrating that methanol can be used as a universal cellulose degradation indicator in power transformers, the ageing study of standard wood kraft specimens in oil in the range of 60–130 °C (Gilbert et al. in Cellulose 16:327–338, 2009) has been extended to thermally-upgraded (TU) papers. The kinetic model that best tracks the ageing patterns was shown to be a function that can accelerate or decelerate the pseudo-zero kinetics by the adjustment of a free parameter. The results showed a non-negligible contribution of 1,4-β-glycosidic bond breaking in the crystalline regions suggesting that the degradation at this level is not necessary occurring through a quantum mode mechanism. The results also showed a significant error in the determination of the rate constants when obtained from isotherms of varying degree of depolymerization. In the case of TU papers, provided that there is a sufficient amount of stabilizers in the fibrous structure, not only could the self-catalyzing nature of the cellulose ageing process as well as the effect of an external supply of catalysts be lost but the chain-breaking could decrease to nearly zero for an undetermined period well before reaching the levelling-off degree of polymerization. The initial rate constants (k 1o) for the depolymerization and methanol formation of these papers were found to be very near those of standard cellulose (giving about the same activation energy), which indicates that they are obtained from the ageing patterns well before the retardant action has fully taken place. The life extension of TU papers is achieved by a reduction with time of the frequency at which the bonds are ruptured. Moreover, the production of methanol and chain-end groups showed about the same value for the frequency factor, which introduces the possibility that the rate of production of CH3OH from chopped chains is much higher than the rate of depolymerization, so that the latter becomes the rate determining step of the overall reaction. On the other hand, the apparent yield of CH3OH molecules per scission is seen to increase substantially with the amount of stabilizers (from ~0.4 to 0.8 and to 1.4 for a paper containing 0 to 1.15 and to 3.9% (w/w) N2) and to a lesser extent, with the moisture in the specimens. However, these variations could either be attributed to a modification of the CH3OH paper/oil partitioning by the stabilizers and moisture in fibrous structure. Finally, pre-aged systems (130 °C for 168 h) conditioned at 20 °C for variable lengths of time provided further evidence that O2 is not necessarily involved in CH3OH production.
Starting Page	253
Ending Page	269
Page Count	17
File Format	PDF
ISSN	09690239
Journal	Cellulose
Volume Number	17
Issue Number	2
e-ISSN	1572882X
Language	English
Publisher	Springer Netherlands
Publisher Date	2009-11-28
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Cellulose ageing 1,4-β-glycosidic bond scission Methanol Depolymerization indicator Kinetics Activation energy Frequency factor Thermally-upgraded insulating paper Moisture content Insulating oil Transformer Remaining life Polymer Sciences Organic Chemistry Physical Chemistry Bioorganic Chemistry
Content Type	Text
Resource Type	Article
Subject	Polymers and Plastics

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Kinetics of the production of chain-end groups and methanol from the depolymerization of cellulose during the ageing of paper/oil systems. Part 1: Standard wood kraft insulation

Identification of a chemical indicator of the rupture of 1,4-β-glycosidic bonds of cellulose in an oil-impregnated insulating paper system

Pulsed KrF excimer laser induced degradation of cellulose based insulating paper

Understanding ethanol versus methanol formation from insulating paper in power transformers

Kinetics of the production of chain-end groups and methanol from the depolymerization of cellulose during the ageing of paper/oil systems. Part 3: extension of the study under temperature conditions over 120 °C

Understanding ethanol versus methanol formation from insulating paper in power transformers

Ageing of oil impregnated thermally upgraded papers

Ageing effects of mineral oil mixtures with thermally upgraded paper.

Methanol Marker for the Detection of Insulating Paper Degradation in Transformer Insulating Oil

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

Similar Documents

Kinetics of the production of chain-end groups and methanol from the depolymerization of cellulose during the ageing of paper/oil systems. Part 1: Standard wood kraft insulation

Identification of a chemical indicator of the rupture of 1,4-β-glycosidic bonds of cellulose in an oil-impregnated insulating paper system

Pulsed KrF excimer laser induced degradation of cellulose based insulating paper

Understanding ethanol versus methanol formation from insulating paper in power transformers

Kinetics of the production of chain-end groups and methanol from the depolymerization of cellulose during the ageing of paper/oil systems. Part 3: extension of the study under temperature conditions over 120 °C

Understanding ethanol versus methanol formation from insulating paper in power transformers

Ageing of oil impregnated thermally upgraded papers

Ageing effects of mineral oil mixtures with thermally upgraded paper.

Methanol Marker for the Detection of Insulating Paper Degradation in Transformer Insulating Oil

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