Cellulase treatment is an effective approach to upgrade dissolving pulp in a natural friendly way. In this study, a comprehensive experiment was conducted to understand the correlation of Fock reactivity increase and intrinsic viscosity decrease during cellulase treatment by varying cellulase charge and treatment time. Results showed that the Fock reactivity and intrinsic viscosity were improved simultaneously, which was caused by the cellulose chain scission. Two phases consisting of an initial fast phase and a second slow phase were identified for the improvement process, which was attributed to the varied recalcitrance of crystalline and amorphous regions of cellulose. A modeling between Fock reactivity and intrinsic viscosity was developed based on Ln S (natural logarithm of cellulose chain scission number). It can be used for prediction and controlling of cellulase treatment of dissolving pulp.

中文翻译：

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Fock反应性与纤维素酶处理过程中溶解浆的特性粘度的相关性

纤维素酶处理是一种以自然友好的方式升级溶解浆的有效方法。在这项研究中，进行了一项综合实验，以了解在纤维素酶处理过程中，通过改变纤维素酶电荷和处理时间，Fock 反应性增加和特性粘度降低之间的相关性。结果表明，Fock反应性和特性粘度同时提高，这是由纤维素断链引起的。为改进过程确定了由初始快速相和第二慢相组成的两个相，这归因于纤维素的结晶和无定形区域的不同顽抗性。基于 Ln S（纤维素断链数的自然对数）建立了 Fock 反应性和特性粘度之间的模型。