Dissolving pulp is an important source of cellulose raw material, and its key quality parameter is the Fock reactivity for viscose rayon application. Cellulase treatment is an effective method for improving the Fock reactivity of kraft-based dissolving pulp. In this study, a novel process concept of improving the cellulase treatment for this purpose was developed, and it consists of mechanical pre-refining and PDADMAC-assisted cellulase treatment. The hypothesis is based on: 1) opening up the fiber structures to improve the cellulase accessibility by pulp prerefining, 2) the addition of cationic poly DADMAC to the subsequent cellulase stage enhances the cellulase adsorption onto anionic fibers due to favorable electrostatic interactions. The results showed that the Fock reactivity of the resultant pulp from the combined treatment is much higher than that of the control, yet, achieved at a much lower cellulase dosage.

中文翻译：

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预精炼与聚二甲基二烯丙基氯化铵辅助纤维素酶联合处理提高溶解浆Fock反应活性


溶解浆是纤维素原料的重要来源，其关键质量参数是粘胶人造丝应用的福克反应性。纤维素酶处理是提高牛皮纸溶解浆Fock反应活性的有效方法。在这项研究中，为此目的开发了一种改进纤维素酶处理的新工艺概念，它包括机械预精炼和PDADMAC辅助纤维素酶处理。该假设基于：1) 通过纸浆预精炼打开纤维结构以提高纤维素酶的可及性，2) 在随后的纤维素酶阶段中添加阳离子聚 DADMAC 由于有利的静电相互作用而增强了纤维素酶在阴离子纤维上的吸附。结果表明，联合处理所得纸浆的 Fock 反应活性远高于对照，但纤维素酶用量却低得多。