阳离子球形聚电解质刷的助留助滤性能

Performances of Cationic Spherical Polyelectrolyte Brushes Used as Retention and Drainage Aids

关键词:  助留助滤  CS-PDMC  填料  首程留着率  滤水速度

Key Words:retention and drainage properties  CS-PDMC  fillers  retention rate  filtration rate

摘要:制备了以碳球(CS)为核、甲基丙烯酰氧乙基三甲基氯化铵(DMC)为壳的阳离子球形聚电解质刷(CS-PDMC),探讨了其与阴离子聚丙烯酰胺（APAM）形成的二元体系中CS-PDMC用量对两种填料(重质碳酸钙（GCC）、高岭土)的首程留着率及浆料滤水性能的影响。当浆料中GCC用量15%时，加入用量0.8%的CS-PDMC(相对于绝干浆，以下同),GCC的首程留着率最高,为79.3%；当浆料中高岭土用量15%时，加入用量1.0%的CS-PDMC,高岭土的首程留着率最高,为88.5%。当浆料中GCC用量10%时，加入用量0.8%的CS-PDMC,浆料滤水速度最快,为0.91 mL/s；当浆料中高岭土用量5%时，加入用量0.8%的CS-PDMC,浆料的滤水速度最快,为0.83 mL/s。

Abstract:Cationic spherical polyelectrolyte brush has become new area of research as paper retention and drainage aids because of its structure characteristics.In this paper, the spherical polyelectrolyte brushes (CS-PDMC) with carbon spheres (CS) as core and methyl methacrylate three methyl ammonium chloride (DMC) as shell were prepared. The effects of different CS-PDMC dosageson the retention rates of two kinds of fillers (GCC, kaolin) and on the drainage of the furnishescontaining two kinds of fillers (GCC, kaolin) were studied. When 15% GCC(on the oven-dried pulp) and 0.8% CS-PDMC were added to the pulp, the retention rate of the filler was the highest for 79.3%; When 15% kaolin and 1.0% CS-PDMC were added to the pulp, the retention rate of the filler was the highest for 88.5%.When 10% GCC and 0.8% CS-PDMC were added to the pulp, the drainage rate was the fastest for 0.91 mL/s; when 5% kaolin and 0.8% CS-PDMC were added to the pulp, the drainage rate was the fastest for 0.83 mL/s. It indicated that using a certain amount of CS-PDMC was of benefit to the retention and drainage properties of the furnish containing the fillers.