Research on the Improvement of Papermaking Performance of Wikstroemia delavayi Lecomte Bark by Bio-enzymes
This study used pectinase,hemicellulase,pectinesterase,and a composite enzyme composed of these enzymes to pretreat the raw materials of Wikstroemia delavayi Lecomte bark. The removal effect of the biocatalyst on non-fiber substances was evaluated by reducing sug-ar content,and the effects of different bio-enzymes on the papermaking performance of Wikstroemia delavayi Lecomte bark were evaluated by testing some indices such as the pulp yield,Kappa value,and physical properties of the paper. The results showed that the D1 enzyme com-pounded by pectinase(10 mL),hemicellulase(10 mg),and pectinesterase(10 mL) had the best removal effect,and the reducing sugar con-tent of the D1 enzyme pretreatment solution was 7.4％. The Kappa value of the pulp obtained from cooking after D1 enzyme pretreatment de-creased by 5.3％ and the whiteness of paper increased by 10.3％ compared with the control sample A0. The D1 enzyme pretreated 20 days and non-enzymatic pretreated raw materials were cooked at 5％ and 6％ K2CO3 (in Na2O),respectively,and folding endurance,tensile index,and tear index of the pretreated papers were increased by 30.3％,14.8％,and 11.2％,respectively,which indicated that the bio-enzymatic pre-treatment was able to reduce the amount of chemicals used in the cooking process and improve the physical properties of the paper.
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