Abstract :
[en] The aim of this study is to compare the effect of different homogenization treat- 12
ments on the physicochemical properties and the hydrolysis rate of a pure bleached 13
cellulose. Results obtained show that homogenization treatments improve the enzymatic 14
hydrolysis rate of the cellulose fibers by 25 to 100 %, depending of the homogenization 15
treatment applied. Characterization of the samples showed also that homogenization had an 16
impact on some physicochemical properties of the cellulose. For moderate treatment inten- 17
sities (pressure below 500 b and degree of homogenization below 25), an increase of water 18
retention values (WRV) that correlated to the increase of the hydrolysis rate was highlighted. 19
Result also showed that the overall crystallinity of the cellulose properties appeared not to be 20
impacted by the homogenization treatment. For higher treatment intensities, homogenized 21
cellulose samples developed a stable tridimentional network that contributes to decrease 22
cellulase mobility and slowdown the hydrolysis process.
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