天丝对碱锰电池隔膜结构性能的影响

Effect of Tencel on Performance of Separator for Alkaline Manganese Battery

通过Valley打浆机制备不同打浆度的原纤化天丝纤维，与合成纤维、植物纤维混合抄造碱锰电池隔膜纸，研究了天丝打浆度、加入量对碱锰电池隔膜纸的孔径结构、吸液保液及强度性能的影响，并与不含天丝纤维的隔膜纸的孔径分布进行了对比。结果表明，经打浆处理的天丝纤维得到充分原纤化，分丝帚化较好，能形成几十至几百纳米直径的超细纤维；天丝纤维的加入及其较高的打浆度有利于提高纸张的抗张强度和减小纸张孔径，但加入量过多，打浆度过高不利于提高纸张的吸碱率和吸碱速度；较佳的天丝纤维添加工艺为打浆度35—45°SR、添加量10％～15％。

Tencel pulp with different beating degrees were prepared by Valley beater, and then were mixed with synthetic fiber and natural fiber to make separator paper for alkaline manganese battery. In this paper, the influence of beating degree of tencel pulp and amount of tencel pulp added on pore structure and electrolyte absorbability and holding performance and strength of paper was studied, the pore size distribution of separator paper without tencel pulp was compared. The result showed that tencel pulp prepared by Valley beater has rich fibrillation structure and can form superfine fibers just some dozens to hundreds nanometers in diameter; tencel pulp with high beating degree is helpful to improve the tensile strength and reduce the pore size, however it is not favorable for absorbing alkaline ratio and absorption rate; the better processing technique is 35 -45°SR beating degree and 10% ～ 15% addition.