天丝纤维原纤化对纸页吸液性能和孔径的影响

Influence of Fibrillation of Tencel Fiber on Absorption Performance and Pore Size of Paper

原纤化的天丝纤维可应用于电池隔膜、超级电容器隔膜材料领域,改善隔膜孔径结构,影响隔膜的吸液性能。本文主要对天丝纤维进行原纤化处理,探讨了天丝纤维原纤化过程及不同原纤化阶段对应纸页吸液性能的差异及孔径分布的变化。结果表明,天丝纤维的原纤化主要分为皮层脱落,芯层剥离,切断,纵向劈裂,主体崩溃,进一步剥离等过程;天丝纤维原纤化使得纸张吸液性能发生变化,在打浆度为15°SR时,紧度为0.27g/cm^3,吸液高度为137mm/10min,92°SR时,紧度为0.44 g/cm^3,吸液高度为23 mm/10min;随着原纤化程度的提高,纸页平均孔径和最大孔径呈现下降趋势,打浆度为15°SR时平均孔径为19.97μm,最大孔径为103.4μm,打浆度为92°SR时平均孔径为0.30μm,最大孔径为0.83μm。

Fibrillated Tencel Fiber could be applied in the separator of battery and super capacitor to improve the structure of pore and affect the absorption performance of paper. In this paper,the fibrillation process of Tencel fiber was studied,and the influence of different degree of fibrillation on absorption performance and pore distribution of paper were discussed. The results show that the fibrillation process of Tencel fiber can be divided into six stages： cortex shedding,core stripping,cutting,longitudinal cleavage,main collapse and further stripping. Furthermore,the absorption performance of paper changed during the Tencel fiber fibrillation,when the beating degree was 15°SR,density was 0. 27 g / cm3,the capillary rise of paper was 137mm/10 min,while the density was 0. 44 g /cm3,the capillary rise of paper was 23 mm/10 min at 92 °SR. With the increasing of the degree of fibrillation,the average pore size and maximum pore size of paper decreased and the pore distribution area ranged in a relatively narrow area,mean flow pore diameter was 19. 97μm,bubble point pore diameter was 103. 4μm at 15° SR and mean flow pore diameter was 0. 30μm,and bubble point pore diameter was 0. 83μm.