中文摘要：

对漂白桉木KP浆的细小纤维及长纤维打浆后产生的细小纤维在电导率作用下的电荷需求量、叩解度和保水值变化情况进行了研究。结果如下：随着电导率升高，P200（原生细小纤维）与P′200（打浆产生的细小纤维）的阳离子需求量及阴离子需求量都在增大，电导率为0．3s／m时分别达到最大值0.0135和0．151meq／g。P200和P′200的初始叩解度分别为51．5和64．5°SR，初始保水值分别为318．7％和452．3％。随着纸料电导率的升高，P200的叩解度有明显下降趋势，而P′200基本不变；P200的保水值在轻微上升，而P′200则呈明显的下降趋势。在电导率接近0s／m时P200的阴离子和阳离子需求量的胶体滴定比率（CTR）值高出P′200的一倍，但在电导率达到0．3s／m以后，两者的CTR值基本接近。在一定的电导率影响下，P200的初始保水值高于其对照值，P′200的初始保水值低于其对照值，随着作用时间的延长，P200和P′200的保水值都呈增大趋势，电导率对P200的保水值影响较小，而对水化程度大的P′200水膜层压缩作用更明显。

英文摘要：

The charge demand, beating degree, and water retention value （WRV） of fines that come from original （P200） and fiber fragment （P′200） were studied under various stock conductivities and treating times. The results showed that cation demand （CD） and anion demand （AD） of both P200 and P′200 increase with stock conductivity raising, and reached the maximum 0. 013 5 and 0. 151 meq/g respectively at 0.3 s/m. The initial beating degrees of both P200 and P′200 were 51.5 and 64.5 °SR respectively, and the initial WRVs of both P200 and P′200 were 318.7 % and 452.3 % respectively. For P200, its beating degree had clearly dropping trend, but its WRV was slightly increasing along with the enhancing of conductivity. For P′200, its beating degree had no change, but its WRV was obviously decreasing along with the enhancing of conductivity. When no other electrolyte was added into fines, the CD of P′200 is higher than P200, and the CTR of P200 was twice of P′200. After 0.3 s/m, the CTR of P200 and P′200 come to approach. At certain stock conductivity, the initial WRV of P200 was higher than that of its control sample, and the initial WRV was lower than that of its control sample. The stock WRVs of both P200 and P′200 had the increasing trend along with the treating time. The stock conductivity has little affection to the WRV of P200, but it has more compression capability to hydration film of P′200.