engleski

Mechanisms of paper degradation in different conditions

Paper is material which is mostly consisted of cellulose, hemicellulose, lignin and different additives (CaCO3, kaoline) can undergo to chemical and physical changes in different environments. This paper evaluates two mechanisms of bulky paper degradation in two conditions, accelerated aging and biodegradation under anaerobic conditions. The changes were accompanied by FT-IR spectra. Significant changes were observed during the biodegradation for cellulose characteristic bands and bands which describes the structure of the polymer, in this case, paper. Changes in the IR spectral range of 1300-1500 cm-1 shows a significant distortion of the paper structure during biodegradation. In this spectral area during accelerated aging of paper no significant changes were observed, or any changes for cellulose characteristic bands. The most significant changes for accelerated aging were observed in the area that shows paper oxidation, in IR spectrum between 1500 -1900 cm-1. In this area, disappearance of certain bands and formation of new (carbonyl group) can be noticed. Observed changes in the IR spectra indicates that hydrolysis and oxidation of organic components of paper occurred, mostly of cellulose and lignin.

Bulky paper, artificial ageing, biodegradation, FTIR

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