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2645447 
Journal Article 
SPRUCE BARK HYDROLYSIS TO OPTIMIZE PHENOLIC CONTENT 
Xavier, D; Emmanuel, F; Philippe, G; Eric, M 
2012 
Yes 
Cellulose Chemistry and Technology
ISSN: 0576-9787 
46 
9-10 
541-550 
WOS:000209015600003 
In this study, the optimization of polysaccharides hydrolysis in order to increase the phenolic content of Picea Abies bark was investigated by screening experimental design. The high phenolic content of bark was interesting in the thermosetting resins synthesis, but the carbohydrate fraction had a negative effect on the mechanical properties and durability of phenolic resins. The purpose of this paper was to determine the main factors influencing the phenolic content of bark during acid hydrolysis. The hydrolysis was performed under atmospheric pressure in an aqueous solution of sulfuric acid. The effects of the reaction time (5 to 24 hours), acid concentration (3 to 10%), solid/liquid ratio (1/10 to 1/5), and particle sizes on the weight loss, lignin content, holoeellulose content, and sugar, as well as degradation products of the hydrolysis, were studied. 
Norway spruce bark; acid hydrolysis; high phenolic content; experimental design