Photochemical Degradation of Cotton Cellulose

Gingras, B. A.; Cooney, David O.; Jackson, Koblar Alan; Bayley, C. H.

doi:10.1177/004051756303301201

Cited by 11 publications

(3 citation statements)

References 14 publications

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“…Volatile and nonvolatile acids were also formed. In a study of the water-soluble products from irradiation of cotton cellulose by Gingras et al (10), glucose, arabinose, cellobiose and f3-D-glucosido-D-arabinose were identified. There was some indication of the presence of glycollic acid and erythrose, but these compounds were not consistently present.…”

Section: Discussionmentioning

confidence: 99%

Resistance of Weathered Cotton Cellulose to Cellulase Action

Kaplan

Mandels

Pillion

et al. 1970

Applied Microbiology

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Section: Discussionmentioning

confidence: 99%

Resistance of Weathered Cotton Cellulose to Cellulase Action

Kaplan

Mandels

Pillion

et al. 1970

Applied Microbiology

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“…, Other fabric samples were purified before exposure by a benzene-methanol ( ---2.5 :1, v/v) Soxhlet extraction for 24 hr (about 18 cycles). This was followed, in some cases only, by three alkali scours with aqueous 1 % sodium hydroxide solution in a nitrogen atmosphere, as reported previously [6]. ' Moisture content measurements were made on the cotton samples which had been treated in the various ways described above, using Canadian Government Specification 4-GP-2, Method 3.…”

Section: Methodsmentioning

confidence: 99%

“…Fortier, Pierre, The Cause and Control of Pilling, Textile Forum, University of North Carolina, June (1965). 6. Gintis, D., and Mead, E. J., Textile Res.…”

mentioning

confidence: 99%

The Effect of Solvents on Some Properties of Cotton Cellulose 1

Wiles

Cooney

Gingras

1967

Textile Research Journal

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Samples of cotton duck were immersed in pyridine, aqueous methylamine solutions, and a variety of other solvents. Pyridine and methylamine caused swelling of the cellulose fibers and an increase in the moisture content of the fabric. Pyridine also increased the fabric breaking strength. This is explained in terms of enhanced plasticization by pyridine and water molecules which are hydrogen-bonded to cellulose. Treatment by pyridine or aqueous methylamine reduced the rate of photochemical degradation of fabric samples exposed in a Weather-Ometer. An explanation for this is based on the changes these solvents cause in the fiber structure, e.g., less dense packing of cellulose chains in the swollen fibers. It is suggested that swollen fibers absorb less of the incident light from a carbon-arc and dissipate more of the absorbed energy without chain scission.

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Photolysis of cellulose and related compounds by 253.7 nm light. I. Rates of gas production from hydrocellulose

Bos

Buchanan

1973

J. Polym. Sci. Polym. Chem. Ed.

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The initial stages of the photolysis of cellulose under vacuum can be followed by the gas production. A photolysis cell is described which allows a rigorous temperature control and gives a reproducible photolysis surface of the solid carbohydrate sample. A mass spectrometer was used to analyze the gases. To measure accurately the small amounts produced in a small volume requires careful calibration of this instrument, together with a fixed routine for the experimental procedure. Using this apparatus, we have photolyzed hydrocellulose under vacuum with 253.7 nm light. Only H2, CO, and CO2 were evolved, the rate of H2 production increasing to a constant value, that of CO increasing more slowly without becoming constant, and that of CO2 decreasing rapidly to a constant value. No induction periods were observed. The gas evolution was not caused by residual O2 or CO2 adsorbed on the polymer, but the rates were altered by leaving the photolyzed sample under vacuum overnight or heating the unphotolyzed sample under vacuum at 100°C. The rates of gas production increased markedly when the light filter was changed to allow a combined photolysis by 253.7 and 184.9 nm light. The results illustrate that stringent precautions must be taken to filter off the latter line in polymer photolyses with Hg arc light if the results are to be meaningfully interpreted in terms of 253.7 nm light photolysis. On photolyzing hydrocellulose previously boiled in NaOH solution, a larger H2 production rate and a smaller CO2 rate (compared with untreated hydrocellulose) were observed. It is suggested that this standard alkali treatment is the reason for the differences between our results and the results of the photolysis of cellulose reported in the literature.

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Photochemical Degradation of Cotton Cellulose

Cited by 11 publications

References 14 publications

Resistance of Weathered Cotton Cellulose to Cellulase Action

Resistance of Weathered Cotton Cellulose to Cellulase Action

The Effect of Solvents on Some Properties of Cotton Cellulose 1

Photolysis of cellulose and related compounds by 253.7 nm light. I. Rates of gas production from hydrocellulose

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