1. Home page
  2. Search

Cotton cellulose ageing in sealed vessels. Kinetic model of autocatalytic depolymerization

This item is provided by the institution :
National Technical University of Athens   

Repository :
Digital Library of National Technical University of Athens | Dspace@NTUA   

see the original item page
in the repository's web site and access all digital files if the item*



Cotton cellulose ageing in sealed vessels. Kinetic model of autocatalytic depolymerization (EN)
Zervos, S (EN)
Moropoulou, A (EN)
journalArticle (EN)
2014-03-01T01:22:02Z
2005 (EN)
In this paper, we propose a new kinetic model that describes the depolymerization of pure cotton cellulose, applicable to ageing experiments in sealed vessels. By recording the pH of the salt solutions used for controlling the relative humidity inside the vessels, we demonstrate that volatile acidic species are produced during the ageing of pure cellulose. Based on the proposition that the acids produced must have an autocatalytic effect on the depolymerization of cellulose, we theoretically developed equations describing the time dependence of the percentage of the broken glycosidic bonds, the folding endurance, tensile strength, tensile energy absorption, stretch at break and the L* and b* coordinates of the CIEL*a*b* color system. The experimentally determined values of these pure cellulose paper properties were fit into the model equations by use of a computer statistical package. The very high values of the regression coefficients indicate that the model equations work quite well. The experimental data and the model equations indicate that for long ageing times (up to 150 days at 80 °C), the deterioration of the sample properties accelerates and finally brings about an abrupt breakdown of the samples. Under the light of these findings, we believe that the useful life of the historical paper stored in archives and libraries is less than predicted by the existing models, and steps for its preservation should be taken immediately. As an additional preservation measure, we propose the ventilation of the storage areas so that the volatile acidic products of paper deterioration that accelerate its ageing are removed. © Springer 2005. (EN)
Materials Science, Textiles (EN)
Polymer Science (EN)
Materials Science, Paper & Wood (EN)
Catalysts (EN)
Cellulose (EN)
cotton (EN)
Degree of polymerization (EN)
Cotton (EN)
pH effects (EN)
Depolymerization (EN)
Reaction Kinetics (EN)
Optical properties (EN)
Reaction kinetics (EN)
Chemical bonds (EN)
Aging (EN)
Ph (EN)
Mechanical Properties (EN)
Sealed vessels (EN)
Catalysis (EN)
Tensile Strength (EN)
Optical Properties (EN)
Moisture (EN)
Mechanical properties (EN)
Tensile strength (EN)
Aging of materials (EN)
depolymerization (EN)
Chemical Bonds (EN)
cellulose (EN)
Cotton cellulose (EN)
Solids (EN)
aging (EN)
Cellulose ageing model (EN)
Cellulose (EN)
English
SPRINGER (EN)
National Technical University of Athens
Digital Library of National Technical University of Athens | Dspace@NTUA
Κεντρική Βιβλιοθήκη Ε.Μ.Π.
Ιδρυματικό Αποθετήριο
Δημοσιεύσεις μελών Δ.Ε.Π. σε περιοδικά



*Institutions are responsible for keeping their URLs functional (digital file, item page in repository site)