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

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 m L/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 m L/s。

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 for0. 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.