稻草低温p-TsOH制浆性能研究

Research on Low-temperature p-TsOH Pulping of Rice Straw

中文关键词:  对甲苯磺酸  稻草  制浆

Key Words:p-toluenesulfonic acid  rice straw  pulping

中文摘要:

      对稻草进行对甲苯磺酸（p-TsOH）一步法制浆和两步法制浆，并与碱法制浆进行对比，探讨了p-TsOH法制浆的可行性。结果表明，与碱法稻草浆相比，p-TsOH稻草浆的得率更高，成纸的松厚度及强度更好；p-TsOH两步法制浆可以进一步提高木质素脱除率，且浆料纤维断裂少，平均纤维长度更长。其中，稀碱-p-TsOH两步法制浆（N-P45T70t60）比p-TsOH一步法制浆（P45T70t60）的木质素脱除率高12.7个百分点，成纸的抗张指数和耐破指数分别高4.52 N·m/g和0.653 kPa·m²/g，耐破指数与碱法稻草浆成纸相当。

Abstract:

      The one-step p-toluenesulfonic acid （p-TsOH） pulping and the two-step p-TsOH pulping were carried out on rice straw， and the feasibility of p-TsOH pulping was discussed by comparing with alkaline pulping. The results showed that compared with the alkaline rice straw pulp， the yield of p-TsOH rice straw pulp was higher， and the paper bulk and strength better. The two-step p-TsOH pulping， compared with its one-step counterpart， could further improve the delignification rate， lessen the fiber breakage with longer average fiber length. Moreover， the lignin removal ratio of dilute alkali-p-TsOH two-step pulping （N-P45T70t60） was 12.7 percentage points higher than that of one-step p-TsOH pulping （P45T70t60）， the tensile and bursting index were 4.52 N·m/g and 0.653 kPa·m²/g higher， respectively； and its bursting index was comparable to that of alkaline rice straw pulp.