果胶酶协同漆酶/谷氨酸体系改善OCC造纸强度性能的研究

Study on Improving Strength Properties of OCC Reconstituted Paper with Pectinase and Laccase/Glutamic Acid System

关键词:  果胶酶  漆酶/谷氨酸体系  强度性能  OCC

Key Words:pectinase  laccase/glutamic acid system  strength properties  OCC

摘要:研究了果胶酶协同漆酶/谷氨酸体系预处理对废旧瓦楞箱纸板（OCC）造纸强度性能的改善。结果表明，采用果胶酶协同漆酶/谷氨酸预处理可以明显提高OCC抄造纸张的强度性能。采用响应曲面法优化的最佳预处理工艺条件为：果胶酶用量3.5 U/g，漆酶用量12.2 U/g，果胶酶处理时间62 min、漆酶处理时间160 min。与未处理的空白纸张相比，最佳工艺条件下预处理的OCC再造纸张的C1相对含量降低26.2%，C2相对含量增加15.0%，C3相对含量增加11.2%，O/C增加27.9%；抄造纸张的抗张强度提高24.7%，耐破度提高33.7%，撕裂度提高25.5%，环压强度提高31.1%。果胶酶协同漆酶/谷氨酸体系预处理可以降解木素，产生更多的羟基。

Abstract:The improvement of strength performance of old corrugated cardboard （OCC） reconstituted paper by pectinase and laccase/glutamic acid pretreatment system was studied. The results showed that pectinase and laccase/glutamate acid pretreatment could significantly improve the strength properties of OCC reconstituted paper. The optimized process conditions via response surface method were that pectinase dosage of 3.5 U/g， laccase dosage of 12.2 U/g， pectinase treatment time of 62 min， laccase treatment time of 160 min. Compared with untreated OCC reconstituted paper， the relative content of C1 of OCC reconstituted paper pretreated under the optimized process conditions was decreased by 26.2%， whereas the relative content of C2， C3 and O/C increased by 15.0%， 11.2% and 27.9%， respectively. The tensile strength， burs strength， tear strength and the ring compression strength of OCC reconstituted paper pretreated under the optimized process conditions were increased by 24.7%， 33.7%， 25.5% and 31.1%， respectively. The pectinase and laccase/glutamate acid pretreatment could degrade lignin and produce more hydroxyl groups.