交联型阳离子聚丙烯酰胺乳液的合成与应用

Synthesis and Application of Cross-linked Cationic Polyacrylamide (CPAM) Emulsion

关键词:  助留助滤剂  阳离子聚丙烯酰胺  交联

Key Words:retention and drainage aid  cationic polyacrylamide  cross-linked

摘要:水基分散体交联型阳离子聚丙烯酰胺（CPAM）是一种新型的阳离子助留助滤剂，具有抗高剪切力和抗盐作用。本实验采用分散聚合法合成了一种固含量为15%的交联型CPAM乳液，研究了其合成的最佳工艺条件，并将自制交联型CPAM与市售直链型CPAM进行比较。结果表明，当总单体质量分数为15%，甲基丙烯酰氧乙基二甲基氯化铵（DMC）与丙烯酰胺（AM）的摩尔比为0.15，引发剂用量为单体总质量的0.11%，N，N′-亚甲基双丙烯酰胺（MBA）用量为40 mg/kg，甲基烯丙基磺酸钠（SMAS）用量为600 mg/kg，反应温度为56℃时，所合成产品的性能最优。在高剪切力与高电导率条件下，自制交联型CPAM的助留助滤性能优于市售直链型CPAM乳液的。

Abstract:Water-based dispersive cross-linked cationic polyacrylamide (CPAM) is a new cationic aid of retention and drainage, which has good performance under high shear and high conductivity circumstance. In the present work, a type of cross-linked CPAM emulsion with solid content of 15% was prepared, the optimum synthesis conditions were investigated, and the cross-linked CPAM was applied in imitating fine paper production as retention and drainage aid to compared with a linear polymer. The results showed that the synthetic CPAM had optimal performance when the mass fraction of comonomers was 15%, initiator, MBA and SMAS were 0.11%, 40 mg/kg and 600 mg/kg, respectively, reaction temperature was 56℃. The retention and drainage performance of cross-linked CPAM was better than that of the commercial linear CPAM emulsion under high shear and high conductivity conditions.