胶黏物不同组分在纸浆中沉积性能的研究

Study on the Deposition Properties of the Components of Stickies in Pulp

关键词:  胶黏物  模型物  沉积性能  滤液性能

Key Words:stickies  model compounds  deposition properties  filtrate properties

摘要:选取甘油三酸酯、聚丙烯酸酯、聚乙烯醇、聚醋酸乙烯酯和丁苯胶乳为胶黏物模型物，添加到二氯甲烷抽提后的漂白硫酸盐针叶木浆中，分析了各胶黏物模型物的沉积性能以及对纸浆滤水性能和滤液性能的影响。实验结果表明，添加有聚丙烯酸酯的纸浆中大胶黏物的产生量较大且滤水性能较差，其中单独添加聚丙烯酸酯的纸浆中大胶黏物面积由0增加到3996 mm²/m²、数量由0增加到9117个/^m2、滤水时间由3.9 s延长到10.8 s；添加模型物后纸浆滤液的阳离子需求量（CD）、滤液中的微粒粒径、滤液浊度较空白样均增大，其中甘油三酸酯对滤液性质的影响最大，单独添加甘油三酸酯后，滤液阳离子需求量由0.060 mmol/L增大到0.229 mmol/L，微粒粒径由284.7 nm增大到378.6 nm，滤液浊度从3.45 NTU增大到181 NTU。

Abstract:The triglycerides, polyacrylate, polyvinyl alcohol, polyvinyl acetate and styrene butadiene latex were used as the model compounds of stickies and added to the bleached kraft softwood pulp which had been extracted with dichloromethane in order to study the deposition properties of the stickies. The deposition properties of the stickies’ model compounds and it’s effect on dewatering of the pulp and the property of the filtrate were analyzed. Results showed that, pulp adding polyacrylate produced more macro stickies and had poorer dewatering properties than the samples adding other model compounds. For the pulp only adding polyacrylate, the area of macro stickies increased from 0 to 3996 mm²/m² , the number of stickies increased from 0 to 9117 m², and water filtrating time prolonged from 3.9 s to 10.8 s. The cationic demand（CD）, particle size and turbidity of pulp filtrate increased after adding model compounds, and triglycerides had the highest impact on the filtrate. Cationic demand of filtrate of the pulp adding triglycerides increased from 0.060 mmol/L to 0.229 mmol/L, the particle size increased from 284.7 nm to 378.6 nm, and the turbidity of filtrate increased from 3.45 NTU to 181 NTU.