麦草的生物-化学制浆

Bio-Chemical Pulping of Wheat Straw

报导了用两种菌Ceriporiopsis subvermispora(C.S.)和Phlebia suberialis(P.S.)分别预处理麦草对碱-蒽醌(AQ)蒸煮得到麦草浆、纸性质的影响。结果表明:菌预处理麦草能提高脱木素和碳水化合物的降解作用,P.S.比C.S.预处理更能提高纸浆的白度、降低卡伯值和黏度。菌预处理浆在所有磨浆度情况下可提高纸页的松密度、白度和撕裂指数,而降低抗张和破裂指数,C.S.比P.S.预处理浆对提高纸页松密度和降低抗张、破裂指数更加明显。还研究了阳离子聚乙烯醇(CPVA)用作干强添加剂改性纤维能够弥补菌预处理对纸页强度的损失。C.S.比P.S.预处理的碱-AQ麦草浆更易吸附CPVA,从而提高纸页强度。应用CPVA对菌预处理未磨浆工磨浆的纤维,在相同抗张强度情况下,都能达到降低纸页定量的目的。

This paper discusses the effect of ceriporiopsis subvert mispora（C. S. ）and phlebia subserialis （P. S. ）fungal pretreatments of wheat straw on the pulp and paper properties of soda-AQ pulp. The re- sults showed that both fungal pretreatments enhanced delignification and carbobydrate degradation. The P.S. pretreatment increased the brightness and decreased the kappa number and viscosity of pulps more than the C.S. pretreatment. The bulk, brightness and tear index of paper increased by the fungal pre- treatments,while the tensile and burst index decreased at all refining levels applied. The C.S. pretreat- ment had more pronounced effect than the P.S. pretreatment on increasing the bulk and decrdasing the tensil and burst index. Alsodiscusses cationic modified poly（vinyl alcohol）, CPVA was used as a dry strength additive to compensate for the loss in the strength properties. The strength properties of the pa- pers made of the C. S. pretreated fibesweve improved mord than those of the P. S. pretreated fibers. The application of CPVA on unrefined or rdfined fungal pretreated fibers showed the basis weight of papers to achieve the same tensile strength.