The Behaviour of Paper Treated in a Carbon Dioxide Modified Atmosphere
| Hlavní autori: | , |
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| Médium: | Článok |
| Jazyk: | angličtina slovenčina |
| ISSN: | ISSN 0034-5806 |
| On-line prístup: | http://www.viks.sk/chk/res_2_03_81_87.doc |
| Abstrakt: | SUMARRIES. Four different kinds of paper, consisting of different pulps, were submitted to treatment within an atmosphere of carbon dioxide concentrations at 100% RH, as it is suggested for the disinfecting of art objects. The treatment atmosphere was conditioned by argon or air respectively. As a general observation there was a negligible influence on the mechanical properties of the cotton and pure cellulose samples and a much greater negative effect on the properties of groundwood containing paper, manifested in reduced folding endurance, which is the most sensitive parameter. CONCLUSION. It can be concluded that treatment in a modified atmosphere of 70% carbon dioxide at 100% RH leads to a small decrease in the values of physical and me chanical properties of paper consisting of cotton, sulphite and sulphate cellulose and noticeably decreases the values of wood pulp containing paper. Folding endurance as the most sensitive value undergoes the greatest changes. It is possible that a high concentration of carbon dioxide and a high relative humidity promoted more intense processes of paper deterioration. Carbonic acid formation can be expected when carbon dioxide encounters water during treatment. Carbonic acid causes a pH of 4, which might promote the hydrolysis of cellulose and lignin. Treatment in an atmosphere with a high concentration of carbon dioxide (60-70 vol.%) at a relative humidity of 100% leads to a small decrease of physical and mechanical properties of paper made from 100% cotton, sulphite and sulphate cellulose and noticeably decreases the physical and mechanical properties, particularly folding endurance, of wood pulp containing paper. |
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| ISSN: | ISSN 0034-5806 |
