Effect of enzymatic treatment of cellulose fibres on their chemical and morphological properties
2002
Hernadi, A. (Paper Research Institute, Budapest (Hungary))
A cellulase enzyme (Pergalase A 40 Genecor) was used to investigate its action on chemical, morphological and papermaking properties of cellulose fibres of different origin. It was established that cellulase enzyme as an hydrolysing agent can cause big changes in the chemical properties of pure cellulose (filter paper, TCF pine pulp and TCF birch pulp). Enzyme causes decrease of accessibility measured by iodine sorption, it increases alkali solubility, produces glucose in filtrate, drops the DP of cellulose molecule by 30-50 percent, increases amount of reducing end groups. Enzymatic treatment of differently beaten pulp yields significant drop of øSR, drainage time, decreasing of specific surface and fine content, at the same time it facilitates the drop of pore volume...
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