中文摘要：

对文化纸生产线网下白水中的溶解与胶体物质（Dissolved and Colloidal Substance,简称DCS）进行了分离及表征,推断其组成及可能来源,以及无机电解质对DCS稳定性的影响.结果表明,DCS主要来源于造纸助剂的失效或水解产物,而纤维原料抽出物含量极少;去除无机电解质后的DCS为表面光滑的颗粒,且均匀分散在白水中,其平均粒径为1.656 μ,m;单一无机电解质会使DCS的稳定性下降,且失稳程度随金属离子的价态增大及浓度升高而增大;白水电导率控制在1887 μS/cm以下,混合无机电解质对DCS的失稳作用影响较小.

英文摘要：

The continuous enrichment of dissolved and colloidal substances （DCS） as well as salts caused by white water closed recycling resuited in the destabilization of DCS,which exerted serious negative impact on the paper machine runnability and paper quality.This paper separated and characterized DCS from white water to infer their source,analyzed their basic properties and studied the effect of salts on the stability of DCS.The results showed that the major components of DCS were chemical additives while the extractives were very little.The DCS were dispersed in form of smooth drops with average particle size of 1.656 μm after dialysis.Electrostatic destabilization of DCS by a single salt was strongly influenced by valence and concentration of the salt,the conductivity of white water should be controlled under 1887 μS/cm to minimize the destabilization by mixed inorganic electrolytes.