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

Zervos, S; Moropoulou, A

dc.contributor.author	Zervos, S	en
dc.contributor.author	Moropoulou, A	en
dc.date.accessioned	2014-03-01T01:22:02Z
dc.date.available	2014-03-01T01:22:02Z
dc.date.issued	2005	en
dc.identifier.issn	0969-0239	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/16453
dc.subject	Cellulose ageing model	en
dc.subject	Degree of polymerization	en
dc.subject	Mechanical properties	en
dc.subject	Optical properties	en
dc.subject	Sealed vessels	en
dc.subject.classification	Materials Science, Paper & Wood	en
dc.subject.classification	Materials Science, Textiles	en
dc.subject.classification	Polymer Science	en
dc.subject.other	Aging of materials	en
dc.subject.other	Catalysis	en
dc.subject.other	Chemical bonds	en
dc.subject.other	Cotton	en
dc.subject.other	Depolymerization	en
dc.subject.other	Mechanical properties	en
dc.subject.other	Moisture	en
dc.subject.other	Optical properties	en
dc.subject.other	pH effects	en
dc.subject.other	Reaction kinetics	en
dc.subject.other	Solids	en
dc.subject.other	Tensile strength	en
dc.subject.other	Cellulose ageing model	en
dc.subject.other	Cotton cellulose	en
dc.subject.other	Sealed vessels	en
dc.subject.other	Cellulose	en
dc.subject.other	Aging	en
dc.subject.other	Catalysts	en
dc.subject.other	Cellulose	en
dc.subject.other	Chemical Bonds	en
dc.subject.other	Cotton	en
dc.subject.other	Depolymerization	en
dc.subject.other	Mechanical Properties	en
dc.subject.other	Moisture	en
dc.subject.other	Optical Properties	en
dc.subject.other	Ph	en
dc.subject.other	Reaction Kinetics	en
dc.subject.other	Solids	en
dc.subject.other	Tensile Strength	en
dc.subject.other	aging	en
dc.subject.other	cellulose	en
dc.subject.other	cotton	en
dc.subject.other	depolymerization	en
dc.title	Cotton cellulose ageing in sealed vessels. Kinetic model of autocatalytic depolymerization	en
heal.type	journalArticle	en
heal.identifier.primary	10.1007/s10570-005-7131-7	en
heal.identifier.secondary	http://dx.doi.org/10.1007/s10570-005-7131-7	en
heal.language	English	en
heal.publicationDate	2005	en
heal.abstract	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 CIELab* 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
heal.publisher	SPRINGER	en
heal.journalName	Cellulose	en
dc.identifier.doi	10.1007/s10570-005-7131-7	en
dc.identifier.isi	ISI:000232663300005	en
dc.identifier.volume	12	en
dc.identifier.issue	5	en
dc.identifier.spage	485	en
dc.identifier.epage	496	en