Interfibrillar hydrogen bonds breaking in refining of fibrous pulp

• Autorzy: Godlewska K. U. , Rawicka A.
• Języki publikacji: EN

Abstrakty

EN

During refining process fibres are subjected to mechanical action to develop their optimal papermaking properties with respect to the product being made. Primary effects of refining (ace. Szwarcsztajn) differs refined fibres from no refined, they will not divide it self in to straighter components, and the effects include internal and external fibrillation as well as fibres shortening. During internal fibrillation water penetrate to areas between fibres structural elements breaking hydrogen bonds. The created connections, called "water-hydrogen bonds" are weaker than hydrogen bonds. Internal fibrillation is qualified as degree of swelling by fibres and is expressed in (%) as a WRV (water retention value). The aim of my research was to see if we could describe by empirical equation relations between some process variables affecting refining time, concentration of beaten pulp, beater lever load and internal fibrillation changes. Developed equation precisely describing dependence of WRV changes on concentrations, charge and time is proposed.

Słowa kluczowe

EN

refining; swelling; internal fibrillation; WRV

PL

rafinacja; pęcznienie; migotanie wewnętrzne; WRV

• Wydawca: West Pomeranian University of Technology. Publishing House
• Czasopismo: Polish Journal of Chemical Technology
• Rocznik: 2003
• Tom: Vol. 5, nr 4
• Strony: 44--46
• Opis fizyczny: Bibliogr. 8 poz., rys., tab.

Twórcy

autor

Godlewska K. U.

autor

Rawicka A.

• Institute of Papermaking and Printing, Technical University of Łódź, ul. Wólczańska 223, 93-005 Łódź, tel.: [phone], fax: [phone],

Bibliografia

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• (3) Przybysz K., Fibrylacja wewnętrzna włókien. Cz. II Analiza przebiegu fibrylacji wewnętrznej, P.P, 56, 5, 60, 2000.
• (4) Przybysz K.,Technologia celulozy i papieru. Technologia papieru 2, WSP, Warszawa 1997.
• (5) Smok G.A., Handbook for pulp & paper technologists, AWP, Vancuver 1993.
• (6) Straton R.A., Characterization of fibre-fibre bond strength from out-of-plan paper mechanical properties, JPPS, 19, 1, J6, 1993.
• (7) Sjöström K., Effects of fiber floc dimensions on the beating results, Papermakers Conference, Book I, 275, 1993.
• (8) Miller P.R., Fibre and sheet properties resulting from refining stock concentration variation, Appita, 42, 2, 125 1989.