화학공학소재연구정보센터
Journal of Industrial and Engineering Chemistry, Vol.13, No.3, 465-473, May, 2007
Optimizing Cellulosic Paper Obtained from Arundo Donax L. under Hydrothermal Treatment
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This paper deals with the study of the autohydrolysis treatment of Arundo Donax L. to obtain a valuable liquid phase and a suitable solid residue for papermaking. The influence of operational conditions in the organosolv pulping (viz., ethanol concentration, temperature and pulping time) on the yield and physical properties of the paper sheets is studied to determine the best pulping conditions to provide suitable paper quality. Moreover, a refining process was used to increase the quality of paper sheets. Maximum temperature of 185 ℃ was achieved in the autohydrolysis of the raw material in order to ensure a minimum degradation of cellulose fiber, suitable removal of the extractives compounds which could be source of further problems related to pitch, and extraction of part of the hemicellulosic fraction (olygomers and some monomers). Temperature displays great positive influence on the highest number of dependent variables. In that form, suitable physical properties of paper sheets were obtained by operating at high temperature (200 ℃) and ethanol concentration (60 %) and long pulping time (130 min). Under these conditions, paper with 17 kN m kg-1 for tensile index, 0.58 kPa m2 g-1 for burst index and 0.95 kN m2 g-1 for tear index could be obtained. Refining process increases the physical properties of paper sheets in: 125.9 % - tensile index, 113.6 % - burst index and 39.8 % - tear index.
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